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Journal articles on the topic 'Directional patterns (antenna)'

Author: Grafiati

Published: 5 June 2025

Last updated: 15 July 2025

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1

Chau, Arnold, John Dawson, Paul Mitchell, and Tian Hong Loh. "Virtual Sensing Directional Hub MAC (VSDH-MAC) Protocol with Power Control." Electronics 9, no. 8 (2020): 1219. http://dx.doi.org/10.3390/electronics9081219.

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Medium access control (MAC) protocols play a vital role in making effective use of a multiple access channel as it governs the achievable performance such as channel utilization and corresponding quality of service of wireless sensor networks (WSNs). In this paper, a virtual carrier sensing directional hub (VSDH) MAC protocol incorporating realistic directional antenna patterns is proposed for directional single hub centralized WSNs. While in most instances, MAC protocols assume idealized directional antenna patterns, the proposed VSDH-MAC protocol incorporates realistic directional antenna pa

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2

Ding, Rong, and Ran Dong Xiao. "Directional Pattern versus Omnidirectional Pattern of Switched Beamform Antennas for Asymptotic Connectivity." Applied Mechanics and Materials 235 (November 2012): 147–51. http://dx.doi.org/10.4028/www.scientific.net/amm.235.147.

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The connectivity of wireless networks is important for data transmission. Gupta and Kumar have already proved that if n nodes with omnidirectional antennas are located randomly, uniformly in a disk of unit area, the critical transmission range to achieve asymptotic connectivity is O( )[1]. In this work, we studied the network connectivity where nodes equipped with switched beamform antennas are randomly and uniformly distributed in a disc of unit area in R2, the antenna can be modeled in omnidirectional and directional patterns. We ﬁrst assume that nodes in the network cooperate in routing eac

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3

Musa, Doaa Salim Mohammed, Ramazan Daşbaşı, and Burak Polat. "Evaluation of Radiation Performances of Various Aperture and Horn Antennas over Sea Surface." European Journal of Research and Development 2, no. 2 (2022): 429–44. http://dx.doi.org/10.56038/ejrnd.v2i2.89.

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Directional Currents Method (DCM) is applied to various aperture and horn antennas including rectangular aperture antenna, circular aperture antenna, dielectric loaded rectangular aperture antenna and E- and H-plane sectoral horn antennas to investigate their radiation performances analytically over sea surface in microwave bands. First, the expressions of the hypothetical directional currents of these antennas are derived in free space and the total radiation patterns are generated by MATLABTM. Then, the same antennas are simulated by the commercial electromagnetic simulation software CSTTM a

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Sedghi, Tohid, Mahdi Jalali, and Tohid Aribi. "Fabrication of CPW-Fed Fractal Antenna for UWB Applications with Omni-Directional Patterns." Scientific World Journal 2014 (2014): 1–5. http://dx.doi.org/10.1155/2014/391602.

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Novel and compact CPW-fed antennas are proposed comprised of a fractal patch and modified ground-plane. The ground-plane is truncated at the center and includes dielectric notches at its side to enhance the antenna’s impedance bandwidth. The dimensions of the notches effectively control the upper and lower band edges of the antenna. The optimized antenna operates across 2.95–12.81 GHz forS11≤-10 dB. Omnidirectional radiation pattern is achieved over the full UWB frequency range. The miniaturized antenna has a total size of14×18×1 mm3. The characteristics of the proposed antenna are suitable fo

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5

Radzivilov, H., M. Ilyinov, and P. Khomenko. "Features computation diagram of annular direction antenna arrays what made on half-wave vibrators located above cylindrical surface." Communication, informatization and cybersecurity systems and technologies, no. 5 (June 1, 2024): 130–37. http://dx.doi.org/10.58254/viti.5.2024.12.130.

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The use of antenna-feeder devices, especially installed on moving objects, indicates the need to modernize and develop new type antenna devices to increase the efficiency of the radio communication system in conditions of active radio electronic suppression. One of the options for providing interference protection in communication channels with moving objects is the use of narrowly directed Smart antennas with a controlled directional pattern. Smart antennas, which are also called intelligent antennas, are one of the varieties of phased antenna arrays. Smart antennas use a set of radiating ele

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6

Safaron, M. S., H. A. Majid, B. A. F. Esmail, et al. "Directional cloverleaf antenna for unmanned aerial vehicle (UAV) application." Indonesian Journal of Electrical Engineering and Computer Science 14, no. 2 (2019): 773. http://dx.doi.org/10.11591/ijeecs.v14.i2.pp773-779.

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3-blade and 4-blade cloverleaf antennas operating at 2.45 GHz have been proposed. In order to achieve directional radiation pattern and high gain, reflector is incorporated to the proposed antennas. The proposed antennas have an average gain of 2.37 dBi while the proposed antennas with reflector have an average gain of 6.38 dBi. The dimension of the proposed antenna is compact enough to be mounted on an unmanned aerial vehicle (UAV). Simulated and measured results are used to demonstrate the performance of the antenna. The simulated and measured return losses, together with the simulated radia

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7

Semenov, Andriy, Olena Semenova, Bogdan Pinaiev, Dmytro Kozin, and Oleksandr Shpylovyi. "Study of the radiation pattern of a rectangular horn antenna in the operation of multimode propagation of electromagnetic waves." Technology audit and production reserves 2, no. 2(64) (2022): 50–55. http://dx.doi.org/10.15587/2706-5448.2022.256560.

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The object of research in the work is the process of radiation of electromagnetic waves and the directional properties of a rectangular horn antenna in a multimode operation. The existing problem is that in practice when developing and researching horn antennas, only the single-mode mode of their operation is taken into account. The fundamental mode of the rectangular waveguide that feeds this horn antenna is chosen as the base mode of the emitted electromagnetic wave. Radiation of higher types of electromagnetic waves is not taken into account. To take into account the impact of higher types

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8

Jin, Hui, Chong-Zhi Han, Yanzhi Fu, and Huaiwen Yang. "A Low-Profile Dual-Band Directional Antenna for Unmanned Aerial Vehicle Applications." International Journal of Antennas and Propagation 2022 (October 17, 2022): 1–7. http://dx.doi.org/10.1155/2022/4765008.

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A low-profile dual-band directional antenna operating at both 2.4 and 5 GHz for wireless local area networks (WLANs) for unmanned aerial vehicles (UAVs) applications is proposed in the paper. Two pairs of dipole antenna arrays with different electrical lengths are utilized to achieve dual-band directional radiation performance, which is desirable for a remote-control unit of the UAVs. Note that the directional radiation characteristic is obtained according to the double-dipole antennas driven by antiphase signals (W8JK), provided the distances between different dipole antennas are properly opt

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9

Yao, Yuan, Wanzhong Chen, Xiaodong Chen, and Junsheng Yu. "Design of Optically Transparent Antenna with Directional Radiation Patterns." International Journal of Antennas and Propagation 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/8125432.

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An optically transparent antenna with directional radiation pattern is proposed in this paper. This antenna consists of a radiation patch above the transparent glass substrate and a frequency selective surface acting as the ground of microstrip antenna on the back of the glass. The frequency selective surface (FSS) performs well as ground in the working frequency range to achieve directional radiation pattern. A SMA connector is used to feed the antenna. The antenna can operate at the on-board dedicated short-range communication band from 5.725 GHz to 5.85 GHz. Simulations and measurements are

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10

Morshed, Khaled M., Debabrata K. Karmokar, and Karu P. Esselle. "Antennas for Licensed Shared Access in 5G Communications with LTE Mid- and High-Band Coverage." Sensors 23, no. 4 (2023): 2095. http://dx.doi.org/10.3390/s23042095.

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Two novel antennas are presented for mobile devices to enable them to access both licensed shared access (LSA) bands (1452–1492 and 2300–2400 MHz) and all the long-term evolution (LTE) mid (1427–2690 MHz) and high (3400–3800 MHz) bands, together with the GSM1800, GSM1900, UMTS, and 3.3 GHz WiMAX bands. These antennas do not require any passive or active lumped elements for input impedance matching. One of them is a dual-band antenna and the other is a wideband antenna. Both antennas have high efficiency in all the LSA bands, as well as the mid- and high-LTE bands, and nearly omnidirectional ra

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11

Andriy, Semenov, Semenova Olena, Pinaiev Bogdan, Kozin Dmytro, and Shpylovyi Oleksandr. "Study of the radiation pattern of a rectangular horn antenna in the operation of multimode propagation of electromagnetic waves." Technology audit and production reserves 2, no. 2(64) (2022): 50–55. https://doi.org/10.15587/2706-5448.2022.256560.

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<em>The object of research in the work is the process of radiation of electromagnetic waves and the directional properties of a rectangular horn antenna in a multimode operation. The existing problem is that in practice when developing and researching horn antennas, only the single-mode mode of their operation is taken into account. The fundamental mode of the rectangular waveguide that feeds this horn antenna is chosen as the base mode of the emitted electromagnetic wave. Radiation of higher types of electromagnetic waves is not taken into account.</em> <em>To take into account the impact of

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12

K, Ramya, Dr G. S. N. Raju, and Dr Sunny Dayal PA. "Array Design Using Genetic Algorithm for the Generation of Sum and Difference Patterns." International Journal of Electrical and Electronics Research 11, no. 1 (2023): 112–18. http://dx.doi.org/10.37391/ijeer.110115.

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In the field of pattern synthesis, the design of arrays to synthesis optimized sum and difference patterns in a successive manner is an important problem in most of the radars. Although several researchers published many papers in the open literature, investigations are made by the authors to design arrays of discrete radiators using a well-formulated Genetic Algorithm (GA). The practical constraints are taken into account to design an amplitude distribution to produce the sum pattern with desired side lobe levels without broadening the main beam. Such sum patterns are found to be very useful

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13

Gavrilova, S. E., A. N. Gribanov, G. F. Moseychuk, and A. I. Sinani. "Features of excitation reconstruction in flat multielement phased antenna array face using dynamic directional patterns." Journal of «Almaz – Antey» Air and Space Defence Corporation, no. 4 (December 30, 2017): 32–39. http://dx.doi.org/10.38013/2542-0542-2017-4-32-39.

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The study focuses on reconstructing the amplitude-phase distribution of flat multielement passive and active phased antenna arrays with the use of dynamic radiation patterns, measured with electronical scanning without mechanical rotations and antenna movements. The paper describes the measurement settings of dynamic radiation patterns, necessary for reconstructing the amplitude-phase distribution. Findings of the research show that to reconstruct the amplitude-phase distribution according to dynamic radiation diagrams, there is no need for increased computational resources due to the use of F

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14

Zhao, Xiaonan, Junping Geng, Ronghong Jin, Yao Jin, Xiang Liu, and Wenyan Yin. "Topological Design of Planar Circularly Polarized Directional Antenna with Low Profile Using Particle Swarm Optimization." International Journal of Antennas and Propagation 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/4983724.

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A topological method for the design and optimization of planar circularly polarized (CP) directional antenna with low profile was presented. By inserting two parasitic layers, generated by particle swarm optimization, between the equiangular spiral antenna and the ground, a low-profile wideband CP antenna with directional radiation pattern and high gain is achieved. The optimized antenna shows an impedance matching band (S11<-10 dB) of 4–12 GHz with a whole-band stable directional pattern in 4–11.5 GHz, and the antenna gain peak is 8 dBi, which work well in the available band. Measured retu

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15

Sheikh, Sharif I. Mitu, W. Abu-Al-Saud, and A. B. Numan. "Directive Stacked Patch Antenna for UWB Applications." International Journal of Antennas and Propagation 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/389571.

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Directional ultrawideband (UWB) antennas are popular in wireless signal-tracking and body-area networks. This paper presents a stacked microstrip antenna with an ultrawide impedance bandwidth of 114%, implemented by introducing defects on the radiating patches and the ground plane. The compact (20×34 mm) antenna exhibits a directive radiation patterns for all frequencies of the 3–10.6 GHz band. The optimized reflection response and the radiation pattern are experimentally verified. The designed UWB antenna is used to maximize the received power of a software-defined radio (SDR) platform. For a

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16

Krasnenko, Nikolay P., Denis S. Rakov, and Alexander S. Rakov. "Directional patterns of the acoustic antenna based on two spatially separated phased antenna arrays." Proceedings of Tomsk State University of Control Systems and Radioelectronics 26, no. 3 (2023): 14–19. http://dx.doi.org/10.21293/1818-0442-2023-26-3-14-19.

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The article presents the results of research and development of the characteristics of the radiation patterns of acoustic antenna systems (linear arrays), consisting of two flat antenna arrays. Their special feature is a large distance between the elements. It is shown that in the near field zone, the directional pattern of the linear system is close to the array factor for the given system. In the far field zone, the directional pattern, in addition to the main lobe, has other (additional) diffraction lobes that depend on the distance and directional characteristics of the system elements. Th

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17

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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18

G., Dattatreya, K. Raghu Vamsi H., Monish Sai Krishna N., and Babu Palli Sekhar. "CPW-FED TEXTILE ANTENNA FOR WEARABLE WIRELESS COMMUNICATION APPLICATIONS." International Journal of Applied and Advanced Scientific Research (IJAASR) 5, no. 2 (2020): 1–6. https://doi.org/10.5281/zenodo.3934700.

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Textile-based miniaturized antennas (20×26×1mm<sup>3</sup>)are designed and analyzed for wearableC-band applications. The proposed antenna uses two rectangular slots to form the first aid-structured antenna. The antenna uses copper foil as a conductive for ground and radiator layers and denim as a dielectric substrate. The structure is simple, compact, conformal, and easy to manufacture using only fabric material. Usually, a primary rectangular antenna has a narrow bandwidth. This paper proposes a rectangular and circular textile-based first-aid structured antenna for wearable appl

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19

Gladyshev, Andrey B. "Investigation of the Directional Characteristics of the Antenna of the Satellite Earth Station Using the Spiral Scanning Method." Journal of Siberian Federal University. Engineering & Technologies 14, no. 7 (2021): 830–39. http://dx.doi.org/10.17516/1999-494x-0349.

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Results of earth station antenna experimental studies of satellite communication were shown. This antenna looks like two-mirror construction designed by Cassegrain circuit with parabolic reflector, which diameter is 1.2 m. This results made with help of spherical scanner by spiral scanning method. Antenna directional patterns were constructed. Deviation reasons of the measured directional characteristics from the calculated ones were analyzed

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20

Amador, Mariana, André Rouco, Daniel Albuquerque, and Pedro Pinho. "Overview of Vivaldi Antenna Selection for Through-Wall Radar Applications." Sensors 24, no. 20 (2024): 6536. http://dx.doi.org/10.3390/s24206536.

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This paper analyzes broadband antennas, with a special focus on Vivaldi antennas, for their suitability for through-wall radar applications. It assesses various antenna designs, emphasizing high gain, wide impedance bandwidth, and effective wall penetration capabilities. Vivaldi antennas are superior due to their broad bandwidth, high gain, and directional radiation patterns. This study further explores structural optimizations, feeding techniques, and performance enhancement strategies to refine Vivaldi antenna designs for through-wall radar systems. Through a comparative analysis and technic

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21

Govardhani, I., M. Venkata Narayana, A. Navya, et al. "Design of high directional crossed dipole antenna with metallic sheets for UHF and VHF applications." International Journal of Engineering & Technology 7, no. 1.5 (2017): 42. http://dx.doi.org/10.14419/ijet.v7i1.5.9120.

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A compact dual band cross dipole antenna surrounded with metallic plates at five sides has been proposed in this article. comparative analysis has been done between the dipole and cross dipole antenna. On comparing these two antennas the proposed antenna has the high gain of 7db and radiation efficiency of 95 percent. The peak directivity of the proposed antenna is 5DB and its front to back ration is 60. The return loss, gain, radiation patterns and co polarization and cross polarization of the antenna has been observed and analysed using AN-soft HFSS v13.The proposed antenna works at the rang

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22

Thivakaran, T. K., and A. Sivabalan. "Compact Ultra-Wideband Slot Antenna with Dual Band Rejection by Using H-Shape Notch." Journal of Computational and Theoretical Nanoscience 16, no. 2 (2019): 687–90. http://dx.doi.org/10.1166/jctn.2019.7791.

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The main objective is to design a dual band rejection micro strip patch antenna. In this antenna, H-shaped slots are made in the patch to achieve notched characteristics at two licensed band employed for Wimax and WLAN band. The above mentioned frequency ranges are licensed for WLAN and satellite communication applications. These antennas maintain the Omni-directional radiation patterns and are mostly suited for ultra wide band applications. For wide band operation, the shape of patch has been altered to octagonal just by chamfering the corners of the rectangular patch. The antenna parameters

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23

Aldhaheri, Rabah, Ibrahim Alruhaili, Kamili Babu, and Muntasir Sheikh. "A Compact CPW-Fed UWB Antenna with Dual-Band Notched Characteristics for WiMAX/WLAN Applications." Applied Computational Electromagnetics Society 36, no. 2 (2021): 145–51. http://dx.doi.org/10.47037/2020.aces.j.360205.

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A dual-notched bands ultra-wideband (UWB) antenna with coplanar waveguide (CPW) fed is presented in the paper. The two notched bands are selected at 3.5 and 5.8 GHz frequencies to overcome the interference from WiMAX and WLAN bands. The overall size of the antenna is 17.5×17.5 mm2, which can be considered as one of the smallest UWB antennas in the literature. The developed antenna has an impedance band width ranging from 2.9 to 13 GHz. The measured radiation patterns on E and H planes are nearly omni-directional and stable with acceptable gain over the entire band. The dual-band notched at WiM

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24

Belichenko, Victor P., Yuri Buyanov, George Dymov, Aleksandr Mironchev, and Aleksandr Gorst. "Three-Dimensional Ultra-Wideband Antenna: From Guiding Physical Considerations to Sequential Computer Optimization of Parameters and Characteristics." Applied Sciences 14, no. 24 (2024): 11658. https://doi.org/10.3390/app142411658.

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Features of radiation from a three-dimensional ultra-wideband (UWB) unidirectional antenna are studied within the framework of the theory of characteristic modes. The antenna has a very simple structure and is distinguished by a rational use of accommodation volume. It has been found that a very wide matching band is provided by the simultaneous excitation of modes of two groups. Since the modes of each group have similar directional patterns, the stability of the antenna directional pattern also occurs practically within the entire matching band.

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Gorobets, N. N., V. A. Katrich, V. A. Lyaschenko, and A. A. Bulgakova. "Formation of Directional Patterns of Planar Antenna Arrays." Telecommunications and Radio Engineering 65, no. 17 (2006): 1547–54. http://dx.doi.org/10.1615/telecomradeng.v65.i17.10.

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Smirnova, M. M., L. G. Statsenko, Yu V. Mirgorodskaya, N. A. Klescheva, and M. V. Bernavskaya. "Research of a Fractal Microstrip Antenna Based on the Modified Minkowski Curve of the Second Iteration." Journal of Physics: Conference Series 2096, no. 1 (2021): 012208. http://dx.doi.org/10.1088/1742-6596/2096/1/012208.

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Abstract Evolving telecommunications systems require modern antennas with improved performance. The creation of miniature antennas with a high gain, multi-band properties and defined polarization is an urgent task. New challenges in the reception and emission of electromagnetic waves are being solved in different ways. The use of fractals in the construction of antennas is becoming widespread. This article presents the results of a study of fractal microstrip antenna of the second iteration based on the Minkowski geometry. The main parameters such as the reflection coefficient, directivity and

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Dou, Yuqing, Guiting Dong, Jiafu Lin, Qibo Cai, and Gui Liu. "A Low Profile Dual-Band High Gain Directional Antenna for Anti-Interference WLAN Station Applications." Applied Sciences 11, no. 5 (2021): 2007. http://dx.doi.org/10.3390/app11052007.

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This paper presents a low-profile dual-band antenna with directional radiation characteristics for wireless local area network (WLAN) applications. The proposed directional antenna is composed of a coupling microstrip line, two F-shaped strips, two rectangular strips, and a defected ground plane. The measured impedance bandwidth of the proposed antenna is 180 MHz (2.33–2.51 GHz) and 830 MHz (5.09–5.92 GHz), which can cover Institute of Electrical and Electronic Engineers (IEEE) 802.11 a/b/g frequency bands. The dual-band antenna exhibits a desirable directional radiation patterns in the vertic

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Desti Putri, Rahayu, Yulindon Yulindon, and Nasrul Nawi. "Antena Mikrostrip Rectangular Patch dengan Inset-Feed dan Array Frekuensi 2.1 Ghz untuk Memperkuat Jaringan 5G." Journal of Comprehensive Science (JCS) 4, no. 3 (2025): 1177–83. https://doi.org/10.59188/jcs.v4i3.3095.

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This study proposes the design of an antenna that works at the frequency of 2.1 GHz used for fifth-generation communication systems. The antenna is designed with FR-4 Epoxy substrate which has the specification of dielectric constant = 4.3, substrate thickness = 1.6 mm. FR-4 Epoxy substrate was chosen because it has a small dielectric constant value, so antenna losses can be reduced. The antenna is designed to have high gain and directional radiation patterns by the inset feed method and array method. The antennas that have been added with the inset feed method and array method have a return l

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Pochaiya, Charernkiat, Srawouth Chandhaket, Prapan Leekul, Jhirat Mearnchu, Tanawut Tantisopharak, and Thunyawat Limpiti. "Bandwidth enhancement of dual-band bi-directional microstrip antenna using complementary split ring resonator with defected structure for 3/5 GHz applications." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (2022): 1683. http://dx.doi.org/10.11591/ijece.v12i2.pp1683-1694.

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<span>This paper presents a bandwidth enhancement of a dual-band bi-directional rectangular microstrip patch antenna. The novelty of this work lies in the modification of conventional rectangular microstip patch antenna by using the combination of two techniques: a complementary split ring resonator (CSRR) and a defected patch structure (DPS). The structure of antenna was studied and investigated via computer </span><span>simulation technology (CST). The dimension and position of CSRR on the ground plane was optimized to achieve dual bandwidth and bi-directional radiation pat

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Al-Saeedi, Mustafa M., Ahmed A. Hashim, Omer H. Al-Bayati, Ali Salim Rasheed, and Rasool Hasan Finjan. "Design of dual band slotted reconfigurable antenna using electronic switching circuit." Indonesian Journal of Electrical Engineering and Computer Science 24, no. 1 (2021): 386–93. https://doi.org/10.11591/ijeecs.v24.i1.pp386-393.

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This paper proposes a dual band reconfigurable microstrip slotted antenna for supporting the wireless local area network (WLAN) and worldwide interoperability for microwave access (WiMAX) applications, providing coverage where both directive and omni-directive radiations are needed. The design consists of a feedline, a ground plane with two slots and two gaps between them to provide the switching capability and a 1.6 mm thick flame retardant 4 (FR4) substrate (dielectric constant Ɛ=4.3, loss tangent δ=0.019), modeling an antenna size of 30x35x1.6 mm3 . The EM simulation, which was carrie

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Wang, Zuojia, Lian Shen, Jun Chen, Huaping Wang, Faxin Yu, and Hongsheng Chen. "Highly Directional Small-Size Antenna Designed with Homogeneous Transformation Optics." International Journal of Antennas and Propagation 2014 (2014): 1–6. http://dx.doi.org/10.1155/2014/891620.

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Achieving high directivity antenna usually requires a large size antenna aperture in traditional antenna design. Previous work shows that, with the help of metamaterials and transformation optics, a small size antenna can perform as high directivity as a large size antenna, but the material parameters are inhomogeneous and difficult to realize. In this paper, we propose a linear homogeneous coordinate transformation to design the small size antenna. Distinguishing from inhomogeneous transformation, we construct a regular polygon in virtual space and then divide it into several triangle segment

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Kiselev, Alexey V., and Anton V. Tayupov. "Error in setting the angular position of a radar object replaced by a two-point model when using an antenna with a difference radiation pattern." Proceedings of the Russian higher school Academy of sciences, no. 4 (December 26, 2024): 15–25. https://doi.org/10.17212/1727-2769-2024-4-15-25.

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The issues of estimating systematic errors in setting the angular position of the apparent radiation center of a radar object simulated by a two-point model when using antennas with difference radiation patterns are considered. The dependence of the angular error on the model parameters, such as the spacing of the emitters, the expected position of the apparent center of radiation and the coefficients of the antenna radiation pattern approximation, is established. The angular error of the bearing is determined by including it in the direction finding characteristic of the antenna as a correcti

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Mursaev, A. N., and S. V. Zinkin. "Features of the Use of Phase-Manipulated Pseudo-Random Signals without On-Board Processing in Satellite Communication Systems with a Nonlinear Repeater." Vestnik IzhGTU imeni M.T. Kalashnikova 24, no. 3 (2021): 46–52. http://dx.doi.org/10.22213/2413-1172-2021-3-46-52.

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The features of the use of phase-manipulated pseudo-random signals without on-board processing in satellite communication systems with a nonlinear repeater are analyzed. In particular, the process of passing signals through a nonlinear repeater is considered, taking into account the resulting combinational interference. In more detail, attention is paid to one of the ways of noise protection of satellite communication lines - the use of spatial signal processing and interference in antenna systems. Depending on the type and number of subscribers served by antenna systems, the implementation of

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Suárez, Carlos, Rafael Rodríguez, and Miguel Ferrando Bataller. "Broadband planar antenna with improved pattern bandwidth." Revista Facultad de Ingeniería Universidad de Antioquia, no. 65 (January 22, 2013): 74–84. http://dx.doi.org/10.17533/udea.redin.14177.

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This article presents the design of an inverted planar F antenna that uses a geometry in which the upper (radiating), short, ground and capacitive excitation plates are divided into two parts. By means of this geometry and the capacitive excitation technique, it is possible to achieve diagram and impedance bandwidths close to 52.44% (1.66 GHz to 2.84 GHz) and 8% (3036 GHz to 3.64 GHz) for a VSWR <= 2.0 The results measured for these parameters are higher than those obtained by the traditional direct terminal excitation technique or other capacitive excitation methods used in inverted F flat

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Ищенко, Е. А., Ю. Г. Пастернак, В. А. Пендюрин, and С. М. Фёдоров. "HALF-WAVE DIPOLE WITH AN ACTIVE REFLECTOR BASED ON OPTO-CONTROLLED METAMATERIAL." ВЕСТНИК ВОРОНЕЖСКОГО ГОСУДАРСТВЕННОГО ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА, no. 4 (October 20, 2021): 71–80. http://dx.doi.org/10.36622/vstu.2021.17.4.010.

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Для обеспечения радиосвязи применяются различные конструкции антенн, которые могут обладать всенаправленными или узконаправленными диаграммами направленности, при этом наибольшей защитой канала связи от помех и от перехвата обладают направленные антенны. Но их недостатком является то, что для обеспечения связи во всех направлениях требуется или установка группы антенн, или использование поворотных платформ, которые ухудшают показатели надежности системы, а также усложняют ее. Поэтому, как правило, для обеспечения связи применяют всенаправленные антенны, которые имеют диаграмму направленности в

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Park, Yeonsang, Jineun Kim, Young-Geun Roh, and Q.-Han Park. "Optical slot antennas and their applications to photonic devices." Nanophotonics 7, no. 10 (2018): 1617–36. http://dx.doi.org/10.1515/nanoph-2018-0045.

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AbstractWe present optical slot antennas and their applications to photonic devices. We show that metallic nanoslots have the properties of a slot antenna by measuring the transmission spectra and far-field radiation patterns and then prove that they can be physically regarded as magnetic dipoles in the optical region. Additionally, we can generate directional radiations from optical slot antennas by adopting the geometry of radiofrequency Yagi-Uda antenna and properly adding auxiliary elements called reflectors and directors to a single slot antenna. We present two cases as the applications o

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Abolade, Jeremiah O., Dominic B. O. Konditi, and Vasant M. Dharmadhikary. "A Comparative Study of Compact Multiband Bio-Inspired Asymmetric Microstrip Fed Antennas (BioAs-MPAs) for Wireless Applications." Journal of Engineering 2021 (February 23, 2021): 1–17. http://dx.doi.org/10.1155/2021/6676689.

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A comparative analysis of compact multiband bio-inspired Asymmetric microstrip fed antennas (BioAs-MPAs) is presented in this paper for the first time. The proposed antennas are based on semi-Carica papaya-leaf shaped, semi-Monstera deliciosa-leaf shaped, semi-Vitis vinifera shaped, Defected Ground Structure (DGS) and L-slit techniques. The antennas are built on a 33 × 15 mm2 Rogers duroid 5880 substrate. The modelling equations for resonant frequencies of the proposed arbitrarily shaped radiating patch is based on modified circular patch modelling equations. The semi-Carica papaya-leaf antenn

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Pelyushenko, S. A. "Measurement of antenna directional patterns using extended radio sources." Radiophysics and Quantum Electronics 29, no. 3 (1986): 249–58. http://dx.doi.org/10.1007/bf01037631.

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Wang, Hao, Shu-Fang Liu, Lei Zhang, Ping Li, Lei Chen, and Xiao-Wei Shi. "Compact wideband and dual-band antenna with directional patterns." Microwave and Optical Technology Letters 57, no. 12 (2015): 2742–45. http://dx.doi.org/10.1002/mop.29423.

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Kuate, Alain Francois, Essiben Dikoundou Jean-François, Joseph Armel Bimogo, Jean Blaise Teguia, and Yameni Fabrice Joel. "Synthesis of Antenna Arrays with Parasitic Elements for Interference Rejection using a LMS Method." International Journal of Engineering and Advanced Technology 11, no. 5 (2022): 52–59. http://dx.doi.org/10.35940/ijeat.e3510.0611522.

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The objective of this paper is to design a parasitic antenna array capable of rejecting interfering signals and directing its main lobe towards the wanted signal. The designed antenna is a linear array consisting of an active monopole and fourteen parasitic monopoles. The method used is LMS, making it possible to calculate the values of the reactive loads to be connected to the ports of the parasitic elements so that the radiation patterns satisfies the fixed constraints. The simulation results in CST-MWS (Computer Simulation Tool Microwave Studio software) of the radiation patterns show an en

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Alain, Francois Kuate, Dikoundou Jean-François Essiben, Armel Bimogo Joseph, Blaise Teguia Jean, and Fabrice Joel Yameni. "Synthesis of Antenna Arrays with Parasitic Elements for Interference Rejection using a LMS Method." International Journal of Engineering and Advanced Technology (IJEAT) 12, no. 5 (2022): 52–59. https://doi.org/10.35940/ijeat.E3510.0611522.

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<strong>Abstract: </strong>The objective of this paper is to design a parasitic antenna array capable of rejecting interfering signals and directing its main lobe towards the wanted signal. The designed antenna is a linear array consisting of an active monopole and fourteen parasitic monopoles. The method used is LMS, making it possible to calculate the values of the reactive loads to be connected to the ports of the parasitic elements so that the radiation patterns satisfies the fixed constraints. The simulation results in CST-MWS (Computer Simulation Tool Microwave Studio software) of the ra

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Smith, Lauryn, and Sungkyun Lim. "Design of a Compact, Planar, Wideband, Overlapped, Bow-Tie Antenna in a Single Layer with Stable Bi-Directional Radiation Patterns." Applied Sciences 14, no. 20 (2024): 9555. http://dx.doi.org/10.3390/app14209555.

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In this paper, a planar, bow-tie antenna with an enhanced bandwidth and a bi-directional radiation pattern is proposed. The concept of multi-resonance is applied by implementing the superposition of three different bow-tie components with various radii and flare angles in an overlapped fashion into a single element, resulting in a significant increase in bandwidth. The antenna has an electrical size, kr, of 1.10, calculated at the lowest frequency of operation. The proposed antenna is simulated, and a prototype is fabricated for verification by measurement. The result is a wide −10 dB bandwidt

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Vira Rahayu, Lhatifatus Sholihah, and Khusnul Khotimah. "SIMULASI DESAIN ANTENA MIKROSTRIP U-SHAPE UNTUK KOMUNIKASI 5G." Jurnal Matematika dan Sains 1, no. 1 (2021): 31–40. http://dx.doi.org/10.55273/jms.v1i1.79.

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5G technology is expected to start spreading in 2020. Underlies the need for study and research on this technology. This study aims to design an antenna that can be used for Fifth Generation (5G) mobile communication transmission. Designing an appropriate antenna design to provide antenna characteristics by the expected working frequency needs to be done so that antenna performance can be maximized. The manufacture of the antenna is carried out with the stages of the process starting from the study of the material, making the antenna design, then this design is analyzed using the CST Suite 201

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Syed, Avez, Nebras Sobahi, Muntasir Sheikh, Raj Mittra, and Hatem Rmili. "Modified 16-Quasi Log Periodic Antenna Array for Microwave Imaging of Breast Cancer Detection." Applied Sciences 12, no. 1 (2021): 147. http://dx.doi.org/10.3390/app12010147.

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In this paper, an effective system for microwave imaging of breast tumor detection using modified 16-planar log periodic antenna (PLPA) array is presented. The modified PLPA operates in the band from 2 to 5 GHz with stable directional patterns in the end-fire direction. Once the results of a single antenna element have been validated, the design is extended to include 16 antenna elements. All 16 transceiver antennas are vertically placed around the phantom in a circular manner where one antenna acts as a transmitter and the rest work as receivers. Delay and Sum (DAS) algorithm is used for post

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Legkiy, N. M., and N. V. Mikheev. "Selection of location of radiators in a non-equivident antenna array." Russian Technological Journal 8, no. 6 (2020): 54–62. http://dx.doi.org/10.32362/2500-316x-2020-8-6-54-62.

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Antennas are one of the main elements of radio engineering systems. Phased antenna arrays (PAR), which make it possible to regulate the direction of radiation due to the ability to control the phases or phase differences of the emitted signal, are the most effective types of antennas. The size, design and shape of the PAR depend on the tasks to be solved, the type of emitters and the nature of their location. The article discusses the transformation of an equidistant PAR into a non-equidistant antenna array in order to reduce the level of side lobes and suppress diffraction maxima with a given

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Dinesh, Sruthi, and Aanandan Chandroth. "Highly Directive and High Gain Multiple Beam Reconfigurable Antenna for Base Stations." International Journal of Electrical and Electronics Research 12, no. 4 (2024): 1337–43. https://doi.org/10.37391/ijeer.120426.

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A directional pattern reconfigurable array with high gain is proposed in this paper in which each antenna element is an array of driven and parasitic arc dipoles. The elements can be selectively excited using RF switches and power dividers to produce high gain patterns in desired single or multiple directions. By providing optimum spacing to array elements via stacking, gain can be further improved by exciting multiple elements simultaneously. The array resonates at 5.8 GHz, which is an ISM frequency. The directivity and realized gain of the unit element are 12 dB and 10.2 dB respectively. We

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Vallappil, Arshad Karimbu, Bilal A. Khawaja, Mohamad Kamal A. Rahim, Muhammad Uzair, Mohsin Jamil, and Qasim Awais. "Minkowski–Sierpinski Fractal Structure-Inspired 2 × 2 Antenna Array for Use in Next-Generation Wireless Systems." Fractal and Fractional 7, no. 2 (2023): 158. http://dx.doi.org/10.3390/fractalfract7020158.

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In this paper, the design, simulation, fabrication, and characterization study of a low-cost and directional hybrid four-element (2 × 2 configuration) Minkowski–Sierpinski fractal antenna array (MSFAA) for the high-efficiency IEEE 802.11ax WLANs (Wi-Fi 6E) and the sub-6 GHz 5G wireless system is presented. Each element of the array is separated by 0.7 λ0. The complete four-element fractal antenna array system includes designing the single-element Minkowski–Sierpinski fractal antenna using two different substrates for performance comparison and an equal-split Wilkinson power divider (WPD) to ac

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Latika Herda, Deri, Joko Suryana, Frenzi Agres Yudithia, Popy Maria, and Najla Raiqah Luthfiah. "A 2-18 GHz Antipodal Vivaldi Antenna for Signal Direction Finding Applications." ELECTRON Jurnal Ilmiah Teknik Elektro 5, no. 2 (2024): 198–206. https://doi.org/10.33019/electron.v5i2.238.

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The demand for advanced direction-finding systems operating in the 2-18 GHz frequency range has surged due to their role in cellular, satellite, and military applications. This increased demand has also led to a rise in illegal transmissions within this spectrum, highlighting the need for accurate signal detection and localization. This paper discusses the design and analysis of a compact antipodal Vivaldi antenna (AVA) aimed at detecting illegal transmitters within the 2-18 GHz band. Direction-finding systems require antennas with wide bandwidth, high gain, and directional radiation patterns

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Charernkiat, Pochaiya, Chandhaket Srawouth, Leekul Prapan, Mearnchu Jhirat, Tantisopharak Tanawut, and Limpiti Thunyawat. "Bandwidth enhancement of dual-band bi-directional microstrip antenna using complementary split ring resonator with defected structure for 3/5 GHz applications." International Journal of Electrical and Computer Engineering (IJECE) 12, no. 2 (2022): 1683–94. https://doi.org/10.11591/ijece.v12i2.pp1683-1694.

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This paper presents a bandwidth enhancement of a dual-band bi-directional rectangular microstrip patch antenna. The novelty of this work lies in the modification of conventional rectangular microstip patch antenna by using the combination of two techniques: a complementary split ring resonator (CSRR) and a defected patch structure (DPS). The structure of antenna was studied and investigated via computer simulation technology (CST). The dimension and position of CSRR on the ground plane was optimized to achieve dual bandwidth and bi-directional radiation pattern characteristics. In addition, th

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Rahman, Md Atiqur, Mohammad Rashed Iqbal Faruque, Eistiak Ahamed, Mohammad Tariqul Islam, and Mandeep Singh. "Nickel Particle-Based Compact Flexible Antenna for Modern Communication Systems." Electronics 8, no. 7 (2019): 787. http://dx.doi.org/10.3390/electronics8070787.

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A flexible antenna is a significant part of the new generation of wireless communication systems. Conventional antennas are typically fabricated on available FR-4 and RT/Duroid dielectric materials, where the dielectric constant cannot be selected arbitrarily and the degrees of freedom in designing the antenna are limited, whereas our flexible substrate offers moderate dielectric values by changing the concentration of the raw materials. Synthesised nickel particle-based flexible nickel aluminate (NiAl2O4) is utilized as a substrate material to make an effective antenna for microwave applicati

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