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Journal articles on the topic 'Monopole antenna'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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1

Wang, Quanxin, Zhongxiang Shen, and Erping Li. "Modal-Expansion Analysis of Multiple Monopole Antennas." International Journal of Antennas and Propagation 2007 (2007): 1–10. http://dx.doi.org/10.1155/2007/76930.

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The modal-expansion method is employed to analyze an array of multiple monopole antennas. A perfectly conducting plate is introduced at the top of the monopole array to facilitate the modal-expansion analysis. Expansion coefficients in the field expressions are found by enforcing continuity conditions of the tangential field components across the regional surfaces. Cylindrical function's addition theorem is employed to realize the transformation of field expressions in different coordinate systems. Numerical results for theS-parameters of a two-monopole antenna are presented and they are in good agreement with experimental ones. Also examined is the effect of the distance between two monopoles on the antenna's mutual coupling and radiation pattern. A four-monopole antenna is studied for its beam-steering capability and simulated results for its radiation properties are compared with those obtained by high frequency structure simulator (HFSS).
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2

Saeidi, Tale, Idris Ismail, Wong Peng Wen, Adam R. H. Alhawari, and Ahmad Mohammadi. "Ultra-Wideband Antennas for Wireless Communication Applications." International Journal of Antennas and Propagation 2019 (April 22, 2019): 1–25. http://dx.doi.org/10.1155/2019/7918765.

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A review paper concerning wide-band and ultra-wideband (UWB) antennas used for wireless communication purposes in terms of the materials as well as a numerical analysis is presented. These antennas which are taken into account are listed as wide-band microstrip antenna, wide-band monopole antenna over a plate, wide-slot UWB antenna, stacked patch UWB antenna, taper slot (TSA) UWB antenna, metamaterial (MTM) structure UWB antennas, elliptical printed monopole UWB antenna, and flexible wearable UWB antenna. The antennas’ performance is compared based on their size and how they can be applicable for portable communication device applications. This review paper furnishes a proper direction to select varieties of figures in terms of impedance bandwidth, gain, directivity, dimensions, time domain characteristics, and materials affecting these antenna’s characteristics.
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3

Ray, K. P. "Design Aspects of Printed Monopole Antennas for Ultra-Wide Band Applications." International Journal of Antennas and Propagation 2008 (2008): 1–8. http://dx.doi.org/10.1155/2008/713858.

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This paper presents the design equations for lower band-edge frequency for all the regular shapes of printed monopole antennas with various feed positions. The length of the feed transmission line is a critical design parameter of these monopole antennas. Design curves for the length of the feed transmission line for various lower band-edge frequencies for all these regular shaped monopoles have been generated. A systematic study has been presented to explain the ultra-wide bandwidth obtained from these antennas with an example of elliptical monopole antenna.
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4

Ghorbani, Mehdi, and Habib Ghorbaninejad. "A Novel Ultrawideband Gear-Shaped Dielectric Ring Resonator Antenna." Mathematical Problems in Engineering 2021 (July 12, 2021): 1–8. http://dx.doi.org/10.1155/2021/8069873.

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In this study, a novel ultrawideband (UWB) dielectric ring resonator (DRR) antenna has been proposed. DRR antennas include a single monopole antenna in the center of a ground plane and a dielectric with a symmetric structure around the monopole. This structure will lead to ultrawide band antenna. However, it is still possible to enhance the antenna bandwidth. In this study, we combine the DRR structure with an array antenna. The proposed antenna includes a circular array of four triangle resonators, which is rotated around the center of the triangle base to form a gear-shaped ring resonator antenna. In this design, characteristics of all these antennas are combined to enhance the antenna bandwidth including triangular dielectric resonator, circular array antenna, dielectric ring resonator structure, and a quarter-wave electric monopole. Triangular dielectric resonator antennas are wideband and in small size. Ring resonator antennas are inherently ultrawideband. Quarter-wave electric monopole and circular array structure can also enhance antenna bandwidth. This novel shape of the DRR antenna possesses the wider impedance bandwidth compared to similar works. Impedance bandwidth is 150% (5.2–36.1 GHz), and the bandwidth ratio is 1 : 6.9, which is much greater than earlier reports.
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5

Chen, Xiaodong, Jianxin Liang, Pengcheng Li, and Choo C. Chiau. "UWB Electric and Magnetic Monopole Antennas." African Journal of Information & Communication Technology 2, no. 1 (February 28, 2006): 21. http://dx.doi.org/10.5130/ajict.v2i1.6.

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This paper summarizes our recent advances in antenna designs for ultra wideband (UWB) applications. Two types of monopoles are studied and developed in our research group. The first type belongs to the electric monopole with a circular disc fed by three different feeding structures. The second type is the magnetic monopole with an elliptical slot. The performances of these two types of antennas are evaluated in both frequency and time domains. The important design parameters for achieving optimal operations are also analyzed. It is shown that both electric and magnetic monopoles can provide ultra wide bandwidth with nearly omni-directional radiation patterns over the entire frequency band. In addition, the impulse responses of the selected antennas are shown to correspond well to the frequency domain characteristics.
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6

Nikolaou, Symeon, and Muhammad Ali Babar Abbasi. "Miniaturization of UWB Antennas on Organic Material." International Journal of Antennas and Propagation 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/5949254.

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Three planar, CPW-fed, UWB antennas with increasingly reduced size are presented and the miniaturization method is discussed. The first antenna is a CPW-fed elliptical slot with an uneven U-shaped tuning stub, the second antenna is a cactus shaped monopole, and the third one is a miniaturized version of the cactus shaped monopole antenna. All presented antennas have a simulated and measured return loss below −10 dB over the 3.1 to 10.6 GHz UWB frequency range and mostly omnidirectional radiation patterns. The proposed antennas are fabricated on liquid crystal polymer (LCP). The CPW-fed slot antenna requires an overall board dimension of 38 mm × 40 mm, and the evolved cactus monopole is confined in a 28 mm × 32 mm board, while the final miniaturized cactus monopole is printed on 28 mm × 20 mm board, resulting in a 41% and 63% size reduction, respectively. Using both simulations and measurements, the paper analyzes the response of all three antennas and discusses and demonstrates the effectiveness of the implemented miniaturization method.
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7

Elsheakh, Dalia M., and Amr M. E. Safwat. "Compact 3D USB dongle monopole antenna for mobile wireless communication bands." International Journal of Microwave and Wireless Technologies 6, no. 6 (March 25, 2014): 639–44. http://dx.doi.org/10.1017/s1759078714000245.

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Three-dimensional compact volume internal antenna for universal serial bus (USB) dongle that covers hexa operating bands is proposed in this paper. The volume of the proposed USB dongle is 15×20×4 mm3; it is based on two connected monopoles, one of them is semi-circular monopole ended by three unit cells of meander-line and the other is a bent monopole with four unit cells of high-impedance wire. The proposed antenna is realized on a printed circuit board to reduce the fabrication costs. The coupling between the antenna elements broadens the operating bandwidth, which includes most of the wireless commercial service bands, GSM850/GSM900/UMTS/GSM1800/GSM1900/WCDMA2100/802.11b/g/LTE2600 (824–2690 MHz) as well as 802.11a/n (5150–5825 MHz). The antenna's simulated and experimental results are in good agreement.
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8

Palantei, Elyas, Arif Hidayat, Wardi Wardi, Intan Sari Areni, Sunarno Sunarno, Eko Setijadi, Dewiani Jamaluddin, et al. "6 Monopole Elements Array Intelligent Antennas for IoT Based Environmental Surveillance Network." EPI International Journal of Engineering 3, no. 2 (January 22, 2021): 126–31. http://dx.doi.org/10.25042/epi-ije.082020.06.

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Three types of 6 monopoles array intelligent antennas was numerically and practically examined. The main purposes of the investigation is to guarantee that those designed antennas are feasible to implement and to install in a particular IoT based environmental surveillance network configuration. The basic differences of the three intelligent antennas lied on the frequency operations (i.e. 433 MHz, 875-915 MHz and 2.5 GHz) and the actual environment operations (whether for indoor or outdoor). The extreme differences of such frequency operations, of course, affecting the differences on the whole antenna physical dimension. The higher the frequency operation determined then the smaller the physical size of the designed antennas produced. However, the deep intelligent antenna evaluations presented in the paper is the one that operated on frequency band of 875 -915 MHz. The intelligent electronic part of six monopole wire elements arrayed on a circular ground plate was composed of LoRa chip module, Android Uno microcontroller, and the switching network part. The three parts determined whole antenna operation throughout the IoT network. The results of whole antenna examinations are thoroughly discussed in the paper.
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9

Kumari, Bibha, and Nisha Gupta. "Multifrequency Oscillator-Type Active Printed Antenna Using Chaotic Colpitts Oscillator." International Journal of Microwave Science and Technology 2014 (November 30, 2014): 1–10. http://dx.doi.org/10.1155/2014/675891.

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This paper presents a new concept to realize a multifrequency Oscillator-type active printed monopole antenna. The concept of period doubling route to chaos is exploited to generate the multiple frequencies. The chaotic Colpitts oscillator is integrated with the printed monopole antenna (PMA) on the same side of the substrate to realize an Oscillator-type active antenna where the PMA acts as a load and radiator to the chaotic oscillator. By changing the bias voltage of the oscillator, the antenna can be made to operate at single or multiple frequencies. To test the characteristics of the antenna at single and multiple frequencies of operation, two similar prototype models of printed monopole broadband antennas are developed. One of these antennas used at transmit side is fed by the chaotic Colpitts oscillator while the other is used as the receive antenna. It is observed that the antenna receives single or multiple frequencies simultaneously for particular values of the bias voltage of the oscillator at the transmit end.
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10

IBRAHIM, NUR. "Pendeteksian Lokasi Sumber Noise (Partial Discharge) secara Tiga Dimensi menggunakan Antenna Array." ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika 3, no. 2 (July 1, 2015): 106. http://dx.doi.org/10.26760/elkomika.v3i2.106.

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ABSTRAKPada penelitian ini akan dilakukan simulasi teknik pendeteksian lokasi sumber noise berupa partial discharge (PD) pada peralatan tegangan tinggi, dengan menggunakan susunan antena yang terdiri dari empat buah antena monopole sebagai sensor untuk mendeteksi gelombang elektromagnetik (EM) yang dipancarkan dari partial discharge (PD). Algoritma yang digunakan mengacu kepada time difference of arrival (TDOA) dari sinyal yang diterima antar antena (dengan menjadikan salah satu antena sebagai antena referensi). Metode yang digunakan untuk menentukan TDOA adalah metode Akaike Information Criterion, metode Energy Criterion, metode Gabor Centroid, metode threshold detection, metode peak detection, dan metode cross-correlation. Sistem pendeteksian lokasi sumber noise ini menggunakan konfigurasi susunan antena membentuk Y. Jarak antar antena diatur sejauh 2 meter dan 4 meter. Berdasarkan hasil pengamatan dan analisis, konfigurasi susunan antena membentuk Y memiliki tingkat akurasi 97.67%. Metode yang paling akurat untuk menentukan TDOA adalah metode cross-correlation.Kata kunci: PD, TDOA, susunan antena.ABSTRACTThis paper presents a simulation of locating noise source (Partial Discharge) on high-voltage apparatuses, by using antenna array that consisted of four monopole antennas as sensor to record the electromagnetic waves (EM) emitted from Partial Discharge (PD). The detection algorithm is based on the time difference of arrival (TDOA) of the signals received between antennas (by using one of four antennas as reference antenna). The methods to determine TDOAs are Akaike Information Criterion method, Energy Criterion method, Gabor Centroid method, threshold detection method, peak detection method, and/or cross-correlation method. These system use Y-shaped array configuration. The adjusted distance between antennas are 2 meter and 4 meter. From the observation and analysis results, Y-shaped array antenna configuration has accuracy 97.76%. The best method to get TDOA is the cross-correlation method.Keywords: PD, TDOA, antenna array.
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11

Hamza, Aven Rawf, and Asaad M. Jassim Al-Hindawi. "The Effecting of Human Body on Slotted Monopole Antenna in Wearable Communications." Journal of Engineering 27, no. 2 (February 1, 2021): 27–43. http://dx.doi.org/10.31026/j.eng.2021.02.03.

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In this paper, the characteristics of microstrip monopole antennas are studied firstly in free space. Secondly, the effects of the human body on the studied antenna's performance are investigated for wearable communications. Different patch shapes of microstrip monopole antenna are chosen to operate at two bands: industrial scientific and medical band (ISM) and ultra-wideband (UWB) for wearable applications. The studied antenna consists of a radiating element on one side of the substrate and a partial ground plane on the other side. The antenna is supposed to fabricate on cloth fabric whose relative dielectric constant is Ɛr =1.7. At the same time, the pure copper could be used as the conducting part representing both the radiating monopole and the partial ground plane. The software program of Computer Simulation Technology (CST) for Microwave Studio (MWS) is utilized to simulate the studied antennas. The obtained results have illustrated that in the free space, the proposed antennas of slotted hexagonal, rectangular, and circular shapes can operate from 2-12 GHz and of the bandwidth of 10.31 GHz, 10.19 GHz, and 9.67 GHz, respectively. The hexagonal antenna is selected and proposed to investigate the effects of the human body on its performance. The human body is simulated, and its effects on the performance of the proposed antenna are studied. The reflection coefficient, Voltage Standing Wave Ratio (VSWR), gain, and efficiency are found over that frequency range. The simulated results indicate that the human body effects are significant, and the proposed antenna showed to be a good candidate for wearable communications.
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12

Bag, Biplab, Priyabrata Biswas, Sushanta Biswas, Partha Pratim Sarkar, and Dibyendu Ghoshal. "Novel Monopole Microstrip Antennas for GPS, WiMAX and WLAN Applications." Journal of Circuits, Systems and Computers 29, no. 03 (May 29, 2019): 2050050. http://dx.doi.org/10.1142/s0218126620500504.

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In this paper, two novel low-profile monopole antennas are presented for simultaneous operation in GPS (Global Positioning System), WLAN (Wireless Local Area Network) and WiMAX (Worldwide Interoperability for Microwave Access) applications. The antennas constitute of a T-shaped microstrip feed line and directly coupled strips to generate multiple bands. The proposed antennas are printed on one side of a low-cost FR4 epoxy substrate and partial ground plane (metal plane is etched partially) are fabricated on the other side of the substrate. The overall dimension of antenna is [Formula: see text][Formula: see text]mm3. Measured results show that the antenna1 (quad band) covers the four distinct operating bands of 320[Formula: see text]MHz (2.17–2.49[Formula: see text]GHz), 190[Formula: see text]MHz (3.31–3.50[Formula: see text]GHz), 270[Formula: see text]MHz (5.18–5.45[Formula: see text]GHz) and 700[Formula: see text]MHz (5.5–6.20[Formula: see text]GHz). Antenna2 (penta band) covers the frequency bands of 1.29–1.98[Formula: see text]GHz (center frequency 1.61[Formula: see text]GHz), 2.78–2.91[Formula: see text]GHz (center frequency 2.83[Formula: see text]GHz), 3.59–3.94[Formula: see text]GHz (center frequency 3.75[Formula: see text]GHz), 5.15–5.33[Formula: see text]GHz (center frequency 5.24[Formula: see text]GHz) and 5.39–6.06[Formula: see text]GHz (center frequency 5.56[Formula: see text]GHz). The detail antenna design and parametric analyses are discussed in steps. The characteristic of radiation pattern and gain are measured. The measured and simulated results are in good agreement. The antennas are designed using a simulation software HFSS v.15.
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13

Zubair, Muhammad, and Muhammad Moinuddin. "Joint Optimization of Microstrip Patch Antennas Using Particle Swarm Optimization for UWB Systems." International Journal of Antennas and Propagation 2013 (2013): 1–8. http://dx.doi.org/10.1155/2013/649049.

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Ultra wideband (UWB) systems are the most appropriate for high data rate wireless transmission with low power consumption. However, the antenna design for UWB has been a challenging task. Moreover, it is always desirable to have more freedom by designing different shape antennas with identical characteristics so that they can be used in either transmitter or receiver depending on other physical constraints such as area. To tackle these issues, in this paper, we have investigated a joint optimization of three different shape-printed monopole antennas, namely, printed square monopole antenna, printed circular monopole antenna and printed hexagonal monopole antenna, for UWB applications. More specifically, we have obtained the optimized geometrical parameters of these antennas by minimizing the mean-square-error for desired lower band edge frequency, quality factor, and bandwidth. The objective of joint optimization is to have identical frequency characteristics for the aforementioned three types of PMA which will give a freedom to interchangeably use them at either side, transmitting or receiving. Moreover, we employ particle swarm optimization (PSO) algorithm for our problem as it is well known in the literature that PSO performs well in electromagnetic and antenna applications. Simulation results are presented to show the performance of the proposed design.
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14

Yao, Yuan, Xing Wang, and Junsheng Yu. "Multiband Planar Monopole Antenna for LTE MIMO Systems." International Journal of Antennas and Propagation 2012 (2012): 1–6. http://dx.doi.org/10.1155/2012/890705.

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A novel multiband-printed planar monopole antenna for LTE multi-input and multi-output (MIMO) application is proposed. A meandering microstrip line-loaded monopole antenna with multiband characteristic is presented. The proposed antenna provides five frequency bands for LTE application, covering 0.7, 1.7, 2.1, 2.3, and 2.5 GHz. In order to provide low mutual coupling and envelope correlation, two of the antennas are combined with orthogonal polarizations. The mutual coupling of the antenna is lower than −13 dB across the operation bands. Both the simulated and measured results are shown to illustrate the performances of the proposed antenna.
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15

Yuanqing, Zhao, Qiu Jinghui, and Wang Wei. "Design of Monopole Antenna Based on Fractal Geometry." International Journal of Antennas and Propagation 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/352126.

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This paper presents a circular disc monopole antenna based on fractal geometry. The antenna is designed to be applied in UWB systems. So it is essential to ensure that the bandwidth of the antenna ranges from 3.1 GHz to 10.6 GHz, that is, IEEE 802.15.3a. However, the proposed antenna has achieved working in the required bandwidth. Compared to the antennas illustrated in most similar literatures, the proposed antenna has a much smaller size, which makes the antenna possible to be integrated with portable devices. Firstly, the antenna was designed through CST Microwave Studio. Then, the antenna was fabricated according to the simulated results. At last, the comparison between the simulated results and measured results was carried out which demonstrated good consistency.
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16

Lutfia, Paulen Aulia, Nurhayati Nurhayati, and Samuel Prasad Jones Christydass. "Umbrella Monopole Antenna for 5G Applications." INAJEEE Indonesian Journal of Electrical and Eletronics Engineering 4, no. 1 (May 14, 2021): 8. http://dx.doi.org/10.26740/inajeee.v4n1.p8-11.

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Umbrella Monopole Antenna (UMA) proposed in this paper for 5G application. We designed four models of UMA, i.e: UMA-A, UMA-B, UMA-C, and UMA-D. The antenna has a curvature in the patch as an umbrella shape with a feeding shape a microstrip feed line. Four variations of the patch antenna have been designed and get different performance in VSWR, surface current, and directivity. The proposed antenna has a wide bandwidth that operates 8 GHz – 30 GHz with VSWR <2 dB. The Increasing of directivity is reached for UMA-A, UMA-C, UMA-D, and UMA-B, i.e: 6.38 dBi, 7.97 dBi, 8,84dBi, and 9,15 dBi respectively at 24 GHz. The maximum gain has been reached for UMA-B of 9.15. The lowest frequency that has a return loss of 10 dB has resulted for UMA-D in the frequency around 5 GHz. All of the UMA antennas can be applied for 5G mmwave applications at 24 GHz and 28 GHz.
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17

B., Partibane, Gulam Nabi Alsath M., and Kalidoss Rajakani. "Design of a bandwidth enhanced hybrid slot loop antenna for GSM/UWB standards." Circuit World 43, no. 3 (August 7, 2017): 105–10. http://dx.doi.org/10.1108/cw-03-2017-0009.

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Purpose This paper aims to presents the bandwidth enhancement of a hybrid slot–loop antenna using a modified feed structure. Design/methodology/approach The conventional monopole feed of the hybrid slot–loop radiator is loaded with a flat microstrip patch to excite higher-order modes. The proposed antenna combines the resonant modes of the slot antenna, the loop antenna and the patch loading. Findings The antenna exhibits a dual-band response suitable for GSM 1800/1900 and ultrawideband (UWB) standards. The impedance bandwidth extends from 1.65 to 1.95 GHz (11.42 per cent) and 3 to 11.1 GHz (114.9 per cent). The proposed antenna has the smallest footprint with a peak gain of 5.07 dBi at 1.8 GHz and 4.97 dBi at 6 GHz. The prototype antenna is fabricated and the simulation results are validated using experimental measurements. The performance of the bandwidth-enhanced hybrid slot–loop antenna is compared with that of other slot antennas. Originality/value Thus, a hybrid slot–loop antenna with an enhanced bandwidth has been reported in this study. The conventional monopole feed of the antenna is replaced with a monopole ending with a microstrip patch load. The antenna covers the operating bands of GSM 1800/1900 and UWB. The proposed antenna has a smaller footprint compared with other wide-slot antennas reported in the literature.
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18

Zhu, Ru Sheng, Xue Liang Wang, and Guo Yan Yang. "A Wideband Monopole Antenna Using Parasitic Elements." Applied Mechanics and Materials 52-54 (March 2011): 1515–19. http://dx.doi.org/10.4028/www.scientific.net/amm.52-54.1515.

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A novel wide band U-shaped monopole antenna with two C-shaped parasitic elements, suitable for WLAN and WiMAX operations, is pretented experimentally and numerically. The wide-band characteristics are obtained by using the U-shaped patch and the two C-shaped parasitic elements along the CPW signal strip. And the simulated wide antenna yields a 10dB impedance bandwidth range from 2.51GHz to 6.0GHz. The antenna is as small as 20×30×1.6mm3. The investigated antennas have been successfully designed, simulated, showing good impedance bandwidth and omni-directional radiation patterns.
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19

Li, Si, Atef Elsherbeni, Zhenfeng Ding, and Yunlong Mao. "A Metamaterial Inspired Compact Miniaturized Triple-band Near Field Resonant Parasitic Antenna for WLAN/WiMAX Applications." Applied Computational Electromagnetics Society 35, no. 12 (February 15, 2021): 1539–47. http://dx.doi.org/10.47037/2020.aces.j.351213.

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This paper presents a metamaterial-inspired triple-band antenna specified for WLAN and WiMAX applications with a compact size of 24mm × 18mm × 1mm (at 2.4 GHz). It consists of a dual-band left-handed metamaterial (LHM) unit surrounded by a G-style monopole antenna. The LHM is first designed and analyzed with equivalent circuits and simulations. A loop antenna based on the LHM unit is designed and simulated to investigate the radiating performance of the LHM unit structure. We also ran simulations for the G-style monopole. Later, the LHM unit is employed as a near-field resonant parasitic (NFRP) element that surrounded by the G-style monopole. A prototype of this antenna is fabricated. Simulations and measurements were carried out and the results match well, identifying good omni-directional radiating performance. Radiation comparisons with the loop antenna and the G-style monopole indicate that due to NFRP, the G-style monopole’s pass bands are shifted to lower frequencies to satisfy 2.45 GHz and 5.5 GHz bands requirements, meanwhile the LHM unit structure operates a third pass band of 3.5 GHz. The compact size and good radiation properties of the antenna render it suitable for WLAN/WiMAX applications.
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20

Ustun, Deniz, and Ali Akdagli. "Design of a dual-wideband monopole antenna by artificial bee colony algorithm for UMTS, WLAN, and WiMAX applications." International Journal of Microwave and Wireless Technologies 9, no. 5 (December 21, 2016): 1197–208. http://dx.doi.org/10.1017/s1759078716001355.

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In this study, a dual-wideband monopole antenna has been designed and developed for the universal mobile telecommunications system (UMTS), wireless local area network (WLAN), and worldwide interoperability for microwave access (WiMAX) applications. A novel approach integrating artificial bee colony (ABC) with the HyperLynx® 3D electromagnetic platform based on the method of moments has been employed to calculate the design parameters of the monopole antenna performance for the respective target frequencies and return loss. The proposed dual-wideband antenna operates in the dual-frequency ranges of 1.69–3.99 and 4.75–6.22 GHz applicable for the UMTS, WLAN, and WiMAX applications and it is fabricated on the flame resistant-4 substrate plate of 42 × 51 × 1.6 mm3. The performance of the presented monopole antenna is analyzed in terms of gain, radiation pattern, and s-parameter. The input reflection coefficient (S11) parameter and radiation pattern of the antenna are verified through the measurements. The measured values of the antenna parameters are found to match well within tolerable limits with the simulation results. The results illustrate that the presented dual-wideband monopole antenna obtained by using the ABC algorithm exhibits better performance in point of operating bands and s-parameter as compared with the multi-band antennas previously published in the literature.
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21

Yu, Yan Zhong, Yan Fei Li, and Lin Chen. "A Folded Dual-Band Monopole Antenna for RFID System." Applied Mechanics and Materials 427-429 (September 2013): 1281–84. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1281.

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A folded dual-band monopole antenna for 2.45 GHz and 5.8 GHz RFID tag applications is proposed in the present paper. It is formed by two folded monopole antennas for reducing the geometric size of the tag. One of them operates at 2.45 GHz, and the other operates at 5.8 GHz. The input impedance of the proposed antenna is designed to be conjugate matched to the chip impedance for the maximum power transfer. This antenna is modeled, analyzed, and optimized by HFSS. The simulation results demonstrate that the performances of the proposed antenna can satisfy the requirements of RFID system. The characteristics of the proposed antenna are simple structure, low cost, and small sizes.
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22

Palsokar, A. A., and S. L. Lahudkar. "Review of Reconfigurable Antennas for LTE, WiMAX and WLAN Application." Advanced Electromagnetics 6, no. 4 (October 22, 2017): 11. http://dx.doi.org/10.7716/aem.v6i4.500.

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To satisfy the requirement of advance wireless system various frequency and pattern reconfigurable antennas are designed. Monopole and PIFA antennas with reconfigurability are preferred for various handheld devices. The objective of this paper was to present a review of reconfigurable monopole and PIFA antennas used for LTE, WiMAX and WLAN frequency ranges. Various optimization techniques used for reconfigurable antenna are also reviewed.
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23

El Sayed Ahmad, Ahmad, Marc Thevenot, Jean-Marie Floc'h, and Mohamad Mantash. "High Gain Array of Monopoles-Coupled Antennas for Wireless Applications." International Journal of Antennas and Propagation 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/725745.

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An array of monopole antennas over a ground plane that radiates a directive lobe in the end-fire direction are described in this paper. The design uses the rigorous method described by Drouet et al. 2008 in order to synthesize the radiation through the strong cumulative coupling between the monopoles. A gain higher than 20 dB was achieved in the end-fire direction over a 4.5% bandwidth. However, the antenna has been tilted in order to compensate the beam deviation caused by the edge diffraction. A prototype with 12 elements has been manufactured in order to validate the antenna principle and the whole antenna is successfully measured. The prototype was studied with the software CST-Microwave Studio and the feed network has been designed with Agilent ADS.
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24

Ma, Liang, Rui Xu, Hongchen Wen, Zhenbing Li, Jian Li, and Yongjun Huang. "Low-Profile Ultra-Broadband Log-Period Monopole End-Fire Antenna." International Journal of Antennas and Propagation 2018 (December 23, 2018): 1–8. http://dx.doi.org/10.1155/2018/7483719.

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This paper proposes an ultra-broadband (2–13 GHz) and low-profile log-period monopole end-fire antenna for the flush-mounted applications. 24 monopoles with a log-period rule are used to cover the whole operating frequency band, and those monopoles are printed on both sides of a low-loss dielectric layer vertically placed over a slot feeding line with wideband microstrip-to-slotline transition. The low profile is realized by bending the parts of the long monopoles so that the overall antenna size is obtained as 40 mm × 100 mm × 13.6 mm. The proposed antenna is fabricated, and the measured results agree with the simulated results very well. The measured results indicate that the proposed antenna can work at the whole 2–13 GHz band with very good end-fire radiation patterns and stable gain performances.
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25

Bakry, Mostafa, and Ludger Klinkenbusch. "Application of Kramers-Kronig transformations to increase the bandwidth of small antennas." Advances in Radio Science 17 (September 19, 2019): 65–70. http://dx.doi.org/10.5194/ars-17-65-2019.

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Abstract. The internally stored electric energy (Q-energy) of a disk monopole antenna increases as compared to a monopole antenna without a top disk. Recently it was shown that the Q-energy can be significantly reduced and the bandwidth increased by shielding the disk monopole antenna using a thin magnetic material. In the present paper we consider the same structure to explain another method to increase the bandwidth by using a shield made of dispersive magnetic material. We apply the Kramers-Kronig transforms to derive physically correct real and imaginary parts of the dispersive magnetic material. We do not aim at a reduction of the internal energy but at a compensation of the electric by a magnetic stored energy for a wide frequency range. Disk monopole antennas with shells consisting of such dispersive permeability are finally numerically evaluated by means of a commercial frequency-domain field simulator.
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26

Yeom, Insu, Junghan Choi, Sung-su Kwoun, Byungje Lee, and Changwon Jung. "Analysis of RF Front-End Performance of Reconfigurable Antennas with RF Switches in the Far Field." International Journal of Antennas and Propagation 2014 (2014): 1–14. http://dx.doi.org/10.1155/2014/385730.

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The RF front-end performances in the far-field condition of reconfigurable antennas employing two commonly used RF switching devices (PIN diodes and RF-MEMS switches) were compared. Two types of antennas (monopole and slot) representing general direct/coupled feed types were used for the reconfigurable antennas to compare the excited RF power to the RF switches by the reconfigurable antenna types. For the switching operation of the antennas, a biasing circuit was designed and embedded in the same antenna board, which included a battery to emphasize the antenna’s adaptability to mobile devices. The measurement results of each reconfigurable antenna (radiation patterns and return losses) are presented in this study. The receiving power of the reference antenna was measured by varying the transmitting power of the reconfigurable antennas in the far-field condition. The receiving power was analyzed using the “Friis transmission equation” and compared for two switching elements. Based on the results of these measurements and comparisons, we discuss what constitutes an appropriate switch device and antenna type for reconfigurable antennas of mobile devices in the far-field condition.
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27

Li, Wei, Ying Suo, Jing Hui Qiu, and Xiao Wei Liu. "Research on Plasma Monopole Antenna and its Wideband Design." Applied Mechanics and Materials 441 (December 2013): 158–61. http://dx.doi.org/10.4028/www.scientific.net/amm.441.158.

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A kind of wideband plasma monopole antenna is proposed, such as circular plasma monopole antenna based on circular monopole theory. The impedance and radiation characteristics of this antenna are simulated. The results show that the band width with return loss below-10dB of the circular plasma monopole antenna can get 123%.
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28

Sharma, Madan Kumar, Mithilesh Kumar, and J. P. Saini. "Measurement Analysis of Ultra-Wideband Monopole Antenna With Defected Ground Structure." International Journal of Measurement Technologies and Instrumentation Engineering 6, no. 1 (January 2017): 1–12. http://dx.doi.org/10.4018/ijmtie.2017010101.

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This article describes how a compact, low profile Ultra-wideband (UWB) monopole antenna with a defected ground structure is designed and demonstrated experimentally. The design and experimentation activities have been carried out with the help of a CST Microwave studio tool. The UWB characteristics of the proposed antenna are achieved with a modification of the ground structure of the referenced antenna with novel L shaped defected ground structure (DGS). Both antennas are fabricated on the same substrate with the dimensions of 28.3 x 24 mm2. The comparative analysis of the results for both antennas clearly indicate that the proposed UWB monopole antenna enhanced the impedance bandwidth from 3.7 GHz – 14.9 GHz without DGS and to 3.4 GHz – 20 GHz with DGS. The enhanced bandwidth, constant group delay and good radiation characteristics of the proposed antenna have identified it as a good candidate for portable UWB applications.
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29

Kumar, P., and J. L. Masa-Campos. "Dual Polarized Monopole Patch Antennas for UWB Applications with Elimination of WLAN Signals." Advanced Electromagnetics 5, no. 1 (May 1, 2016): 46. http://dx.doi.org/10.7716/aem.v5i1.305.

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This paper presents the design, fabrication and measurement of dual polarized microstrip patch antennas for ultra wideband (UWB) applications with notch at 5-6 GHz band. The proposed antenna rejects the wireless local area network (WLAN) signals and work properly in the entire remaining ultra-wideband. Two antennas are designed for two different frequency bands of ultra wideband and both antennas together produce the entire ultra wideband with notch at 5-6 GHz band. The antennas are fed by a 50 coaxial probe and the entire design is optimized using CST Microwave Studio. The bandwidth of 3.1-5 GHz is achieved by the optimized design of Antenna-1 and the bandwidth of 6 -10.6 GHz is achieved by the optimized design of Antenna-2. The bandwidth of the optimized combined antenna is 3.1-10.6 GHz with elimination of the 5-6 GHz band. Both antennas are simulated, developed and measured. The simulated and measured results are presented. The two designed dual polarized antennas i.e. Antenna-1 and Antenna-2 can be used for 3.1-5 GHz band and 6-10.6 GHz band dual polarized applications, respectively, and the combined antenna structure can be used for UWB dual polarized applications with elimination of 5-6 GHz band signals.
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30

Ahirwar, S. D., and C. Sairam. "Broadband Corrugated Square-Shaped Monopole Antenna." ISRN Communications and Networking 2011 (October 17, 2011): 1–9. http://dx.doi.org/10.5402/2011/248931.

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Design and development of a corrugated square-shaped monopole antenna is presented with measured results. The operational bandwidth of the antenna is 300 MHz–3000 MHz. The antenna is derived from a square-shaped planar monopole antenna. This basic square-shaped radiating element is corrugated in its lateral dimension. This corrugation reduces the lateral dimension of the antenna by 60%. Electrical performance of this antenna is better than its parent counterpart. This paper presents design and performance characteristics of conventional square-shaped monopole and its derivative, that is, broadband corrugated square-shaped monopole antenna.
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31

Mathur, Rohit, and Santanu Dwari. "Compact 4-Port MIMO/Diversity Antenna with Low Correlation for UWB Application." Frequenz 72, no. 9-10 (August 28, 2018): 429–35. http://dx.doi.org/10.1515/freq-2017-0232.

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Abstract A compact four port multiple-input-multiple-output (MIMO) antenna with polarization diversity for ultrawideband (UWB) application is proposed. The antenna contains four monopoles where each monopole has three concentric rings. Orthogonal arrangement of monopoles of the antenna provides good isolation and polarization diversity. The antenna has compact size of 36×36×1.6 mm3. It operates in the frequency band of 3.2 to 11 GHz where isolation is better than 15 dB. The envelop correlation coefficient (ECC) and diversity gain from S-parameter have been calculated to evaluate MIMO performance of the antenna. In addition to ensure distortion less transmission in UWB group delay is also calculated.
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32

Li, Chao, Fu-Shun Zhang, Fan Zhang, and Kaiwen Yang. "A Compact Dual-Band Circularly Polarized Antenna with Wide HPBWs for CNSS Applications." International Journal of Antennas and Propagation 2018 (2018): 1–10. http://dx.doi.org/10.1155/2018/3563949.

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A compact dual-band circularly polarized antenna with wide half-power beamwidths (HPBWs) for compass navigation satellite system applications is proposed in this paper. The CP radiation is realized by arranging four compact dual-band inverted-F monopoles symmetrically to the center point, where the four monopoles are excited with a 90° phase offset through a compact sequential-phase feeding network. The compactness of the dual-band inverted-F monopole is realized by inserting two chip inductors in the horizontal portion of the monopole. The overall dimension of the antenna is only 0.211λ0 × 0.211λ0 × 0.057λ0, where λ0 is the corresponding free-space wavelength at 1.268 GHz. Experimental results show that the proposed antenna exhibits two overlapped impedance and axial ratio bandwidths of 50 MHz (1.236–1.286 GHz) and 40 MHz (1.532–1.572 GHz). Wide HPBWs of about 120°/125° and 121°/116° (XOZ/YOZ planes) at center frequencies (1.268, 1.561 GHz) of the CNSS-2 B3 and B1 bands are obtained, respectively. With these good performances, the antenna can be a good candidate for CNSS applications.
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33

Jacobsen, Rasmus E., Andrei V. Lavrinenko, and Samel Arslanagić. "Electrically Small Water-Based Hemispherical Dielectric Resonator Antenna." Applied Sciences 9, no. 22 (November 13, 2019): 4848. http://dx.doi.org/10.3390/app9224848.

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Recently, water has been proposed as an interesting candidate for use in applications such as tunable microwave metamaterials and dielectric resonator antennas due to its high and temperature-dependent permittivity. In the present work, we considered an electrically small water-based dielectric resonator antenna made of a short monopole encapsulated by a hemispherical water cavity. The fundamental dipole resonances supported by the water cavity were used to match the short monopole to its feed line as well as the surrounding free space. Specifically, a magnetic (electric) dipole resonance was exploited for antenna designs with a total efficiency of 29.5% (15.6%) and a reflection coefficient of −24.1 dB (−10.9 dB) at 300 MHz. The dipole resonances were effectively excited with different monopole lengths and positions as well as different cavity sizes or different frequencies in the same cavity. The overall size of the optimum design was 18 times smaller than the free-space wavelength, representing the smallest water-based antenna to date. A prototype antenna was characterized, with an excellent agreement achieved between the numerical and experimental results. The proposed water-based antennas may serve as cheap and easy-to-fabricate tunable alternatives for use in very high frequency (VHF) and the low end of ultrahigh frequency (UHF) bands for a great variety of applications.
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34

Paredes, F., G. Zamora, S. Zufanelli, F. J. Herraiz-Martínez, J. Bonache, and F. Martín. "Recent Advances in Multiband Printed Antennas Based on Metamaterial Loading." Advances in OptoElectronics 2012 (October 22, 2012): 1–12. http://dx.doi.org/10.1155/2012/968780.

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It is shown that printed antennas loaded with metamaterial resonators can be designed to exhibit multiband functionality. Two different antenna types and metamaterial loading are considered: (i) printed dipoles or monopoles loaded with open complementary split ring resonators (OCSRRs) and (ii) meander line or folded dipole antennas loaded with split ring resonators (SRRs) or spiral resonators (SRs). In the first case, multiband operation is achieved by series connecting one or more OCSRRs within the dipole/monopole. Such resonators force opens at their positions, and by locating them at a quarter wavelength (at the required operating frequencies) from the feeding point, it is possible to achieve multiple radiation bands. In the second case, dual-band functionality is achieved through the perturbation of the antenna characteristics caused by the presence of the metamaterial resonators. This latter strategy is specially suited to achieve conjugate matching between the antenna and the chip in radiofrequency identification (RFID) tags at two of the regulated UHF-RFID bands.
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35

Li, Hao, Lu Xu, Feng Qian, and Yong Zhou. "Train-mounted Broadband Monopole Antenna for 5G Communication." Applied Computational Electromagnetics Society 36, no. 7 (August 19, 2021): 879–84. http://dx.doi.org/10.47037/2021.aces.j.360709.

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As a convenient and efficient public transport system, high speed railway (HSR) was rapidly deployed in China. Since the fifth generation (5G) mobile communication system is commercially applied, it is necessary for mobile terminals antennas to cover multiple operating bands to be compatible with various communication systems. Here a HSR-mounted broadband and high-gain monopole antenna is proposed. By using the meander technology and introducing the tapered structure, the proposed antenna operates over a bandwidth of 694-960 MHz and 1350-5975 MHz (VSWR<1.8), which covers both 2G-5G mobile communication and WiFi frequency bands. The dimensions of the proposed antenna are 400 mm × 330 mm × 78 mm. The measured average gain is 6.11 dBi over the entire bandwidth.
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36

Bora, Pronami, Mona Mudaliar, Yuvraj Baburao Dhanade, K. Sreelakshm, Chayan Paul, and B. T P Madhav. "Metamaterial extended CSRR based monopole antenna for wideband applications." International Journal of Engineering & Technology 7, no. 1.1 (December 21, 2017): 461. http://dx.doi.org/10.14419/ijet.v7i1.1.10145.

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A metamaterial extended microstrip rectangular patch antenna with CSRR loading and defected ground structures(DGS) is proposed for wideband applications with band notching at the frequencies of KU band. The proposed antenna is designed by embedding it on Rogers RT/Duroid 5880 substrate with good impedance matching of 50 Ω at the feedline.The high frequency structure simulator (HFSS) is used to design and simulate the antennas parameters in the operating band. Measurement results confirm the antenna characteristics as predicted in the simulation with a slight shift in frequencies.
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37

Rajoriya, Kamal raj Singh, and P. K. Singhal. "Monopole Antenna with Modify Ground Plane." International Journal of Engineering & Technology 1, no. 3 (July 11, 2012): 266. http://dx.doi.org/10.14419/ijet.v1i3.142.

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This paper presents on modified the ground plane of monopole antenna with varying the shape and length. Basically the length of ground plane of monopole antenna is equal and greater than ?/4. Here analyzed a different ground plane of monopole antenna that is provided an efficient bandwidth with sufficient return loss.
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38

Pathak, P., and P. K. Singhal. "Compact Broadband Monopole Antenna for C Band Applications." Advanced Electromagnetics 7, no. 5 (December 15, 2018): 118–23. http://dx.doi.org/10.7716/aem.v7i5.815.

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This paper reports a new design of broadband monopole patch antenna. The proposed antenna possess corner truncated rectangular patch with slits and defected ground structure, these modifications considerably improves the impedance bandwidth to 41.29% over a wideband (5.1–7.59 GHz). The design is appropriate for wireless communication including WLAN IEEE 802.11 g/a (5.15–5.35 GHz and 5.725–5.825 GHz) and C Band (4–8 GHz) applications. An antenna prototype is fabricated using FR-4 with an electrical permittivity of 4.4. Experimental and numerical simulations of antenna’s radiation characteristic are also reported and exhibits good concurrence.
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39

Vatamanu, David, and Simona Miclăuş. "UHF Fractal Antennas: Solutions for Radio Links Using Matlab Simulations." International conference KNOWLEDGE-BASED ORGANIZATION 26, no. 3 (June 1, 2020): 179–84. http://dx.doi.org/10.2478/kbo-2020-0135.

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AbstractThe paper proposes the use of MATLAB simulations as a first step in identifying proper antennas to be used in specific ultra-high frequency (UHF) communication links. Giving that fractal antennas provide interesting features, we aimed at comparing a few of their significant parameters with those of a monopole antenna so as to ensure signal coverage between two real sites situated at 5.82 km distance in a mixture of urban and flat – open terrain conditions. We started from the requirements imposed to the return loss of the antenna and to the link margin, we established their desired thresholds and then computed solutions regarding which antenna type in the set provide the highest received power and on which frequency sub-bands can be successfully used. The studied fractal antenna set were from the series Koch, Koch loop and Sierpinski. The chosen radio link refers to a real situation on the map. Generally, different narrow bands were provided by each antenna regardless of its type, but still, comparing them with the monopole, better solutions could be identified.
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40

Chen, Z. N. "Broadband planar monopole antenna." IEE Proceedings - Microwaves, Antennas and Propagation 147, no. 6 (2000): 526. http://dx.doi.org/10.1049/ip-map:20000797.

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41

Hallbjörner, P., and P. Hallbjörner. "Dual feed monopole antenna." IEE Proceedings - Microwaves, Antennas and Propagation 150, no. 3 (2003): 159. http://dx.doi.org/10.1049/ip-map:20030473.

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42

Abbasi, Nisar Ahmad, Richard Langley, and Shahid Bashir. "Multiband shorted monopole antenna." Journal of Electromagnetic Waves and Applications 28, no. 5 (February 5, 2014): 618–33. http://dx.doi.org/10.1080/09205071.2014.882271.

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43

Floc'h, J. M., and L. Desclos. "Surface-mounted monopole antenna." Microwave and Optical Technology Letters 16, no. 6 (December 20, 1997): 349–52. http://dx.doi.org/10.1002/(sici)1098-2760(19971220)16:6<349::aid-mop8>3.0.co;2-k.

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44

Freeman, J. L., B. J. Lamberty, and G. S. Andrews. "Optoelectronically reconfigurable monopole antenna." Electronics Letters 28, no. 16 (1992): 1502. http://dx.doi.org/10.1049/el:19920954.

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45

Mantash, M., A. C. Tarot, S. Collardey, and K. Mahdjoubi. "Wearable monopole zip antenna." Electronics Letters 47, no. 23 (2011): 1266. http://dx.doi.org/10.1049/el.2011.2784.

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46

Premalatha, B., M. V. S. Prasad, and M. B. R. Murthy. "Compact Hexagonal Monopole Antenna." Indian Journal of Science and Technology 10, no. 19 (February 1, 2017): 1–13. http://dx.doi.org/10.17485/ijst/2017/v10i19/113718.

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47

Premalatha, B. "Compact Hexagonal Monopole Antenna." Indian Journal of Science and Technology 10, no. 1 (January 10, 2017): 1–13. http://dx.doi.org/10.17485/ijst/2017/v10i19/91388.

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48

Wu, Yanjie, Kang Ding, Bing Zhang, Jianfeng Li, Duolong Wu, and Kun Wang. "Design of a Compact UWB MIMO Antenna without Decoupling Structure." International Journal of Antennas and Propagation 2018 (2018): 1–7. http://dx.doi.org/10.1155/2018/9685029.

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A compact high isolation ultrawideband (UWB) multiple-input-multiple-output (MIMO) antenna is designed. The proposed MIMO antenna consists of a rectangular monopole antenna and a slot antenna fed by two microstrip lines, respectively. To improve the impedance matching, a circular coupling structure is designed to feed the tapered slot antenna. The parasitic resonance introduced by the ground stub helps to extend the impedance bandwidth of monopole antenna at the upper UWB band. Commonly used complex decoupling or coupling structures are eliminated that endow the proposed antenna minimized foot print, which is preferred in mobile handset. Although without decoupling structure, high isolation is obtained between two antenna elements. Simulation and measurement verify the antenna’s desirable performance, showing a broad impedance bandwidth of 3.1–10.6 GHz with |S11| < −10 dB and |S21| < −20 dB over 3.4–10.6 GHz, and |S21| < −18 dB from 3.1–3.4 GHz.
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49

Elajoumi, S., A. Tajmouati, A. Errkik, Am Sanchez, and M. Latrach. "Microstrip Rectangular Monopole Antennas with Defected Ground for UWB Applications." International Journal of Electrical and Computer Engineering (IJECE) 7, no. 4 (August 1, 2017): 2027. http://dx.doi.org/10.11591/ijece.v7i4.pp2027-2035.

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This paper presents the design of new compact antennas for ultra wide band applications. Each antenna consists of a rectangular patch fed by 50Ω microstrip transmission line and the ground element is a defected ground structure (DGS). The aim of this study is to improve the bandwidth of these antennas by using DGS and the modification geometry of rectangular structure, which gives new compact antennas for UWB applications. The input impedance bandwidth of the antennas with S11&lt;-10dB is more than 10GHz, from 3GHz to more than 14 GHz. The proposed antennas are investigated and optimized by using CST microwave studio, they are validated by using another electromagnetic solver Ansoft HFSS. The measured parameters present good agreement with simulation. The final antenna structures offer excellent performances for UWB system.
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50

Martínez-Lozano, Andrea, Carolina Blanco-Angulo, Héctor García-Martínez, Roberto Gutiérrez-Mazón, Germán Torregrosa-Penalva, Ernesto Ávila-Navarro, and José María Sabater-Navarro. "UWB-Printed Rectangular-Based Monopole Antenna for Biological Tissue Analysis." Electronics 10, no. 3 (January 27, 2021): 304. http://dx.doi.org/10.3390/electronics10030304.

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This paper presents the design of a printed step-type monopole antenna for biological tissue analysis and medical imaging applications in the microwave frequency range. The design starts from a very simple and widely known rectangular monopole antenna, and different modifications to the antenna geometry are made in order to increase the bandwidth. The antenna dimensions are optimized by means of a parametric analysis of each dimension using a 3-D electromagnetic simulator based on the finite element method. The optimized antenna, with final dimensions of 40 × 36 mm2, is manufactured onto a low-cost FR4 (fiber glass epoxy) substrate. The characteristics of the antenna have been measured inside an anechoic chamber, obtaining an omnidirectional radiation pattern and a working frequency range between 2.7 GHz and 11.4 GHz, which covers the UWB frequencies and enables the use of the antenna in medical imaging applications. Finally, the behaviour of four of these antennas located around a realistic breast model, made with biocompatible materials, has been analysed with the electromagnetic simulator, obtaining good results and demonstrating the usefulness of the designed antenna in the proposed application.
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