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Journal articles on the topic 'Narrowband antenna'

Author: Grafiati

Published: 10 December 2022

Last updated: 29 January 2023

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1

Hamzah, S. A., M. Esa, N. N. N. A. Malik, and M. K. H. Ismail. "Narrowband-to-Narrowband Frequency Reconfiguration with Harmonic Suppression Using Fractal Dipole Antenna." International Journal of Antennas and Propagation 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/834387.

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Harmonic suppressed fractal antenna with switches named TMFDB25 is developed to select desired frequency band from 400 MHz to 3.5 GHz. The radiating element length is changed to tune the operating frequency while the stub is used to eliminate the undesired harmonic frequency. The balun circuit is reduced by 75% from the original size. The antenna is built on a low loss material. It has the ability to select a single frequency out of fifteen different bands and maintain the omnidirectional radiation pattern properties. Furthermore, the antenna is designed, built, and tested. Simulation and meas

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Rodi, R. I. M., M. N. Osman, M. K. A. Rahim, et al. "Narrowband to Narrowband Frequency Tunable Slotted Dipole Antenna." Journal of Physics: Conference Series 1755, no. 1 (2021): 012036. http://dx.doi.org/10.1088/1742-6596/1755/1/012036.

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Parida, Rajeev K., Arjuna Muduli, Dhruba C. Panda, and Deepak Kumar Nayak. "Integrated Multi-Operational Antenna System Design for CR Applications." IOP Conference Series: Materials Science and Engineering 1187, no. 1 (2021): 012006. http://dx.doi.org/10.1088/1757-899x/1187/1/012006.

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Abstract A four-port multi-operational antenna system is designed for Cognitive Radio application. It consists of a sensing ultra-wideband antenna and three communicating narrowband antenna. The CPW fed monopole is a sensing antenna. It covers 2-11 GHz of the UWB band. The three narrow band antennas are operating at 5.834 GHz, 6.42 GHz, 7.355 GHz, and 8.786 GHz respectively. The mutual coupling is below-15 dB. This integrated UWB/NB antenna system can also be a good candidate for C-band, Maritime radio navigation, and X-band applications.

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Nachouane, Hamza, Abdellah Najid, Abdelwahed Tribak, and Fatima Riouch. "Reconfigurable and Tunable Filtenna for Cognitive LTE Femtocell Base Stations." International Journal of Microwave Science and Technology 2016 (June 8, 2016): 1–10. http://dx.doi.org/10.1155/2016/9460823.

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A single-port uniplanar antenna with a built-in tunable filter is presented for operation in multiple LTE bands for cognitive femtocell applications. The antenna is based on a monopole microstrip patch fed by coplanar waveguide. The frequency reconfigurability is achieved by using two PIN diodes to couple or decouple a ring slot resonator filter from the antenna feed line. By switching the PIN diodes, the proposed design can operate in either wideband or narrowband modes. When the antenna operates in the narrowband state, two varactor diodes are used to continuously tune the narrowband frequen

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Islam, Md Shazzadul, Muhammad I. Ibrahimy, S. M. A. Motakabber, A. K. M. Zakir Hossain, and S. M. Kayser Azam. "Microstrip patch antenna with defected ground structure for biomedical application." Bulletin of Electrical Engineering and Informatics 8, no. 2 (2019): 586–95. http://dx.doi.org/10.11591/eei.v8i2.1495.

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Proper narrowband antenna design for wearable devices in the biomedical application is a significant field of research interest. In this work, defected ground structure-based microstrip patch antenna has been proposed that can work for narrowband applications. The proposed antenna works exactly for a single channel of ISM band. The resonant frequency of the antenna is 2.45 GHz with a return loss of around -30 dB. The -10dB impedance bandwidth of the antenna is 20 MHz (2.442-2.462 GHz), which is the bandwidth of channel 9 in ISM band. The antenna has achieved a high gain of 7.04 dBi with an inc

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Garza-Resendiz, Eva Karla, Mario Reyes-Ayala, Edgar Alejandro Andrade-Gonzalez, and Hilario Terres-Peña. "U-Slot Cut Rectangular Microstrip Antenna with a Large Ground Plane and a Thin Substrate." WSEAS TRANSACTIONS ON COMMUNICATIONS 20 (February 25, 2021): 12–17. http://dx.doi.org/10.37394/23204.2021.20.3.

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It is very well known that the Rectangular Microstrip Antennas (RMA) are narrowband, but it is possible to enhance its bandwidth by cutting slots inside the patch. Some slots variations have been used to improve this important feature in modern mobile radiocommunication systems. U-slot antennas are employed in broadband applications, but it is very important to consider the usage of a thick substrate with a low dielectric constant. In this paper, an U-slot RMA built in a The Printed Circuit Board (PCB) with a thin FR4 substrate for 800 MHz to 900 MHz is presented and analyzed. The PCB that is

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Idris, I. H., M. R. Hamid, M. H. Jamaluddin, et al. "Multi-narrowband-reconfigurable slot dipole antenna." Microwave and Optical Technology Letters 56, no. 3 (2014): 735–40. http://dx.doi.org/10.1002/mop.28155.

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8

Khurshid, Adnan, Jian Dong, and Ronghua Shi. "A Metamaterial-Based Compact Planar Monopole Antenna for Wi-Fi and UWB Applications." Sensors 19, no. 24 (2019): 5426. http://dx.doi.org/10.3390/s19245426.

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Ultrawideband (UWB) antennas are widely used as core devices in high-speed wireless communication. A novel compact UWB monopole antenna with an additional narrow band for Wi-Fi applications comprising a metamaterial (MTM) is proposed in this paper. The antenna has a compact size of 27 × 33 mm2 and consists of a V-shaped slot with two rectangular slots in the radiation patch. The inductance and capacitance develop due to the V-shaped slot in the radiation patch. The proposed antenna has −10 dB bandwidths of 3.2 GHz to 14 GHz for UWB and 2.38 GHz to 2.57 GHz for narrowband, corresponding to 144%

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9

Qi, Liang, Linas Minkevičius, Andrzej Urbanowicz, et al. "Antenna-Coupled Titanium Microbolometers: Application for Precise Control of Radiation Patterns in Terahertz Time-Domain Systems." Sensors 21, no. 10 (2021): 3510. http://dx.doi.org/10.3390/s21103510.

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An ability of lensless titanium-based antenna coupled microbolometers (Ti-μbolometers) operating at room temperature to monitor precisely radiation patterns in terahertz time-domain spectroscopy (THz-TDS) systems are demonstrated. To provide comprehensive picture, two different THz-TDS systems and Ti-μbolometers coupled with three different antennas—narrowband dipole antennas for 0.3 THz, 0.7 THz and a log-periodic antenna for wideband detection—were selected for experiments. Radiation patterns, spatial beam profiles and explicit beam evolution along the propagation axis are investigated; pola

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10

CLEETUS, Ros Marie C., and Gnanadhas Josemin BALA. "Antenna Reconfiguration Techniques for Cognitive Radio: A Review." Walailak Journal of Science and Technology (WJST) 17, no. 12 (2020): 1412–31. http://dx.doi.org/10.48048/wjst.2021.8976.

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As the usage of wireless communicative devices is multiplying day by day, the need for the occupiable radio spectrum is also increasing. The inefficiency in the exploration of available licensed radio spectrum has rerouted the focus to effectively use it against the increasing demand. One of the available methods is to implement Cognitive Radio (CR) technology. The Cognitive Radio uses 2 antennas at a time in order to scan and to communicate with the available spectrum. While an Ultrawideband (UWB) antenna scans the spectrum for unused bands of frequencies, Narrowband (NB) antennas communicate

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11

Kumar, N. Anvesh, and A. S. Gandhi. "A Compact Novel Three-Port Integrated Wide and Narrow Band Antennas System for Cognitive Radio Applications." International Journal of Antennas and Propagation 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/2829357.

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The design of a three-port radiating structure, integrating wide and narrow band antennas for cognitive radio applications, is presented. It consists of a UWB antenna for spectrum sensing and two narrow band antennas for wireless communication integrated on the same substrate. The UWB antenna covers the complete UWB spectrum (3.1 GHz to 10.6 GHz) approved by FCC. In the two narrow band antennas, each antenna presents dual bands. In particular, the first narrowband antenna resonates at 6.5 GHz, covering the frequency band between 6.36 GHz and 6.63 GHz, and at 9 GHz, covering the frequency band

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Artner, Gerald, Philipp K. Gentner, Johann Nicolics, and Christoph F. Mecklenbräuker. "Carbon Fiber Reinforced Polymer with Shredded Fibers: Quasi-Isotropic Material Properties and Antenna Performance." International Journal of Antennas and Propagation 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/6152651.

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A carbon fiber reinforced polymer (CFRP) laminate, with the top layer consisting of shredded fibers, is proposed and manufactured. The shredded fibers are aligned randomly on the surface to achieve a more isotropic conductivity, as is desired in antenna applications. Moreover, fiber shreds can be recycled from carbon fiber composites. Conductivity, permittivity, and permeability are obtained with the Nicolson-Ross-Weir method from material samples measured inside rectangular waveguides in the frequency range of 4 to 6 GHz. The decrease in material anisotropy results in negligible influence on

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13

Yassin, Mohammed E., Hesham A. Mohamed, Esmat A. F. Abdallah, and Hadia S. El-Hennawy. "Circularly Polarized Wideband-to-Narrowband Switchable Antenna." IEEE Access 7 (2019): 36010–18. http://dx.doi.org/10.1109/access.2019.2904697.

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Nachouane, Hamza, Abdellah Najid, Abdelwahed Tribak, and Fatima Riouch. "Dual Port Antenna Combining Sensing and Communication Tasks for Cognitive Radio." International Journal of Electronics and Telecommunications 62, no. 2 (2016): 121–27. http://dx.doi.org/10.1515/eletel-2016-0016.

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Abstract Dynamic spectrum access has been proposed as the effective solution to overcome the spectrum scarcity issue, supported by cognitive radio technology. Sensing and communication functions are both the most important tasks in cognitive radio systems. In this paper, an antenna system combining sensing and communication tasks is proposed to be integrated into cognitive radio front-ends. The sensing task is performed by means of an ultra-wideband quasi-omnidirectional antenna. Whilst the communication task is ensured by using a narrowband antenna. Both antennas have been designed on the sam

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15

Koley, Santasri, Himanshu Pant, and Lakhindar Murmu. "Half-Elliptical UWB Planar Monopole with Reconfigurable Slot Antenna for Cognitive Radio Front-End." Journal of Circuits, Systems and Computers 27, no. 13 (2018): 1850213. http://dx.doi.org/10.1142/s0218126618502134.

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In this paper, a half-elliptical disc ultra-wideband (UWB) monopole antenna integrated with a reconfigurable rectangular slot antenna is presented. It consists of a half-elliptical disc radiator to operate in the UWB mode whereas the etched rectangular slot on the half-elliptical patch is designed to operate as a reconfigurable narrowband slot antenna which is fed through a microstrip line from the back side of the patch. Both the antennas are placed in such a way that they are isolated to each other. Frequency reconfigurability has been achieved by inserting three lumped elements (two PIN dio

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Lim, Seonho, and Young Joong Yoon. "Wideband-Narrowband Switchable Tapered Slot Antenna for Breast Cancer Diagnosis and Treatment." Applied Sciences 11, no. 8 (2021): 3606. http://dx.doi.org/10.3390/app11083606.

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In this paper, a wideband-narrowband switchable tapered slot antenna (TSA) with a compact meander line resonator for an integrated microwave imaging and hyperthermia system was proposed. A compact meander line resonator, which exhibited band-pass characteristics and provided narrowband characteristics by using one PIN diode, was fabricated beneath the tapered slot of the wideband TSA to minimize the degradation of the wideband characteristics. Moreover, the electromagnetic energy was transferred to the meander line resonator with a coupling effect to ensure effective frequency switching. By ad

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17

Jain, Satish K. "Bandwidth enhancement of patch antennas using neural network dependent modified optimizer." International Journal of Microwave and Wireless Technologies 8, no. 7 (2015): 1111–19. http://dx.doi.org/10.1017/s1759078715000616.

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Since a conventional microstrip patch antenna is inherently a narrowband radiator, stacked-patch antennas are commonly used either to enhance the bandwidth or to achieve multi-band characteristics. However, the stacked patch structure has a number of geometrical variables which need to be optimized to achieve the desired characteristics. The conventional design procedure involves repeated costly and time-consuming simulations on an electromagnetic simulator to optimize the various geometrical parameters to arrive at the desired radiation characteristics. In this paper, the task of stacked patc

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18

Majid, H. A., M. K. A. Rahim, M. R. Hamid, and M. F. Ismail. "A Compact Frequency-Reconfigurable Narrowband Microstrip Slot Antenna." IEEE Antennas and Wireless Propagation Letters 11 (2012): 616–19. http://dx.doi.org/10.1109/lawp.2012.2202869.

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19

Nikolopoulos, V., M. Fiacco, S. Stavrou, and S. R. Saunders. "Narrowband fading analysis of indoor distributed antenna systems." IEEE Antennas and Wireless Propagation Letters 2 (2003): 89–92. http://dx.doi.org/10.1109/lawp.2003.814775.

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20

Ebrahimi, Elham, James R. Kelly, and Peter S. Hall. "Integrated Wide-Narrowband Antenna for Multi-Standard Radio." IEEE Transactions on Antennas and Propagation 59, no. 7 (2011): 2628–35. http://dx.doi.org/10.1109/tap.2011.2152353.

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21

Foutz, Jeffrey, Andreas Spanias, and Mahesh K. Banavar. "Narrowband Direction of Arrival Estimation for Antenna Arrays." Synthesis Lectures on Antennas 3, no. 1 (2008): 1–76. http://dx.doi.org/10.2200/s00118ed1v01y200805ant008.

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22

Ghimire, Jiwan, and Dong-You Choi. "Design of a Compact Ultrawideband U-Shaped Slot Etched on a Circular Patch Antenna with Notch Band Characteristics for Ultrawideband Applications." International Journal of Antennas and Propagation 2019 (February 18, 2019): 1–10. http://dx.doi.org/10.1155/2019/8090936.

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Interference between ultrawideband (UWB) antennas and other narrowband communication systems has spurred growth in designing UWB antennas with notch characteristics and complicated designs consisting of irregular etched slots and larger physical size. This article presents a simplified notched design method for existing UWB antennas exhibiting four frequency-band-rejecting characteristics. The investigation has been conducted by introducing four semicircular U-shaped slot structures based on a theoretical formulation. The formulation is validated with the equivalent LC lumped parameters respon

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23

Broumandan, Ali, John Nielsen, and Gérard Lachapelle. "Performance of Narrowband Signal Detection under Correlated Rayleigh Fading Based on Synthetic Array." International Journal of Antennas and Propagation 2009 (2009): 1–13. http://dx.doi.org/10.1155/2009/610109.

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The performance of a single moving antenna receiver in detecting a narrowband signal under correlated Rayleigh fading is considered. The spatial motion of the antenna during signal capture provides a realization of a synthetic antenna array. As shown, there is a net processing gain obtained by using a synthetic antenna array compared to the equivalent static antenna in Rayleigh fading environments subject to constant processing time. The performance analysis is based on average Signal-to-Noise Ratio (SNR) metrics for design parameters of probability of detection(Pd)and probability of false ala

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Gudimella, Sunil Sriharsha. "Design and Analysis of Microstrip Patch Antennas for Narrow Band Communication Applications." International Journal for Research in Applied Science and Engineering Technology 10, no. 6 (2022): 2040–48. http://dx.doi.org/10.22214/ijraset.2022.44276.

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Abstract- Microstrip antennas are low-profile antennas. A metal patch mounted at a ground level with a dielectric material in between constitutes a Microstrip or Patch Antenna. These are very low- size antennas having low radiation. The patch antennas are popular for low-profile applications at frequencies above 100 MHz, these antennas consist of a very thin metallic strip placed on a ground plane with a dielectric material in-between. Usually, the antennas are chosen to be circular or rectangular in shape for ease of analysis and fabrication. These antennas are employed at ultra-high frequenc

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Karami, Farzad, Halim Boutayeb, Ali Amn-e-Elahi, Alireza Ghayekhloo, and Larbi Talbi. "Developing Broadband Microstrip Patch Antennas Fed by SIW Feeding Network for Spatially Low Cross-Polarization Situation." Sensors 22, no. 9 (2022): 3268. http://dx.doi.org/10.3390/s22093268.

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A stacked multi-layer substrate integrated waveguide (SIW) microstrip patch antenna with broadband operating bandwidth and low cross-polarization radiation is provided. A complete study on the propagating element bandwidth and cross polarization level is presented to demonstrate the importance of the design. The proposed antenna includes three stacked printed circuit board (PCB) layers, including one layer for the radiating 2 × 2 rectangular patch elements and two SIW PCB layers for the feeding network. There are two common methods for excitation in cavity-backed patch antennas: probe feeding

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Karami, Farzad, Halim Boutayeb, Ali Amn-e-Elahi, Alireza Ghayekhloo, and Larbi Talbi. "Developing Broadband Microstrip Patch Antennas Fed by SIW Feeding Network for Spatially Low Cross-Polarization Situation." Sensors 22, no. 9 (2022): 3268. http://dx.doi.org/10.3390/s22093268.

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A stacked multi-layer substrate integrated waveguide (SIW) microstrip patch antenna with broadband operating bandwidth and low cross-polarization radiation is provided. A complete study on the propagating element bandwidth and cross polarization level is presented to demonstrate the importance of the design. The proposed antenna includes three stacked printed circuit board (PCB) layers, including one layer for the radiating 2 × 2 rectangular patch elements and two SIW PCB layers for the feeding network. There are two common methods for excitation in cavity-backed patch antennas: probe feeding

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27

S, Amalasofiah, and Preethi C. "A New Metamaterial Printed Microstrip Yagi -Array Antenna for ISM band Applications." International Journal of Students' Research in Technology & Management 3, no. 4 (2015): 320–24. http://dx.doi.org/10.18510/ijsrtm.2015.342.

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A traditional yagi antenna is used for broadband applications. A New Metamaterial Printed Microstrip Yagi -Array Antenna has been introduced here. This antenna is found to operate at 2.4GHz. The microstrip yagi-array antenna is loaded with artificial split ring resonators (SRRs) which is used for achieving the metamaterial effect in the structure. The overall circuit size of the designed antenna is 11.5*11.5*0.25mm3 with reduced cross polarization and the substrate used is FR4 epoxy with dielectric constant 4.4 which is readily available. The designed antenna achieved about 4dB of gain and it

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28

Majid, H. A., M. K. A. Rahim, M. R. Hamid, and O. Ayop. "Reconfigurable wideband to narrowband antenna using tunable EBG structure." Applied Physics A 117, no. 2 (2014): 657–61. http://dx.doi.org/10.1007/s00339-014-8719-2.

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Hossa, R., and M. Bialkowski. "Mutual coupling compensation in narrowband small linear-antenna arrays." Microwave and Optical Technology Letters 40, no. 5 (2004): 391–96. http://dx.doi.org/10.1002/mop.11390.

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30

Kiani, Saad Hassan, Xin Cheng Ren, Muhammad Rizwan Anjum, et al. "A Novel Shape Compact Antenna for Ultrawideband Applications." International Journal of Antennas and Propagation 2021 (October 5, 2021): 1–7. http://dx.doi.org/10.1155/2021/7004799.

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Nowadays, more attention has been given into ultrawideband by dint of its extraordinary features over narrowband communication systems. This study presents a novel compact with tilted square frames shape antenna with partial ground plane. The proposed antenna is printed on commercially available Fr4 substrate with relative thickness of 1.6 mm. The antenna has compact dimensions of 14 × 18 mm2 with bandwidth ranging from 3.3 to 11.5 GHz. The peak gain obtained is 1.4 dBi with omnidirectional radiation characteristics throughout the entire bandwidth. The proposed antenna is fabricated, and the d

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31

Mohd Zali, Hanisah, Mohd Khairil Adzhar Mahmood, Idnin Pasya, Miyuki Hirose, and Nurulazlina Ramli. "Narrowband and wideband EMW path loss in underwater wireless sensor network." Sensor Review 42, no. 1 (2021): 125–32. http://dx.doi.org/10.1108/sr-04-2021-0128.

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Purpose Utilization of electromagnetic wave (EMW) sensors in an underwater environment has the potential to increase the data rate compared to acoustic-based sensors because of the ability to use larger signal bandwidth. Nevertheless, EMW signals has the drawback of large signal attenuation in underwater, attributed to the high relative permittivity and conductivity of water compared to the atmosphere, hence employment of wide signal bandwidth is necessary to balance the data rate-attenuation trade-off. The purpose of this paper is to analyze the characteristics of both narrowband and wideband

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32

Shareef, Faez Fawwaz, and Manal Jamil Al-Kindi. "Wideband hybrid precoder for mmWave multiuser MIMO OFDM communications." Bulletin of Electrical Engineering and Informatics 11, no. 3 (2022): 1409–17. http://dx.doi.org/10.11591/eei.v11i3.3551.

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Using millimeter wave (mmWave) transmission for massive multiple input multiple output (MIMO) system can improve system performance and effectively reduce the size of the massive antennas array. However, A wideband beamformer design is needed to take advantage of this wideband channel. In this paper, a downlink multi-user massive MIMO orthogonal frequency division multiplexing (MIMO OFDM) system for mmWave communications is proposed. Each subcarrier channel can be approximated as a narrowband clustered channel, so a narrowband precoder can be applied for each subchannel. The hybrid precoder is

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Liu, Lingfeng, Peng Zhang, Xiaonan Wang, Xiaoyan Zhang, and Nan Jiang. "Analysis of Static Narrowband On-Body Channel Polarization Distribution at 2.4 GHz." International Journal of Antennas and Propagation 2018 (October 3, 2018): 1–10. http://dx.doi.org/10.1155/2018/6759394.

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The polarization of on-body propagation channels has shown significant spatial selectivity and full-space distribution in numerous measurements due to the near-field characteristics and strong body scattering effect. To get a comprehensive image of such polarization distribution, in this work, we measured polarized on-body channels on static body at 2.4 GHz by monopole antennas, where standing and sitting postures are included. The polarization of the measured on-body antennas covers the full-space in Z-, H-, and V-direction relative to the skin of the body. Consequently, an extended cross-pol

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Chang, Chung-Liang, and Bo-Han Wu. "A Dynamic Cooperative Scheme with Multiple Antennas for Indoor Mobile Robot Localization." Abstract and Applied Analysis 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/972371.

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This paper proposes a spatial cooperative diversity and decision-making technique to enhance signal detection and indoor mobile robot positioning performance of a global positioning satellite system (GNSS) receiver. Though the adaptive antenna array technique in early research could effectively promote antijamming freedom, overcome time-varying system, and mitigate narrowband and wideband interferences, factors such as the decrease of signal magnitude caused by obstacles (especially in the indoor environment), multipath, and blanking effect caused by the change in antenna direction with the mo

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Fei, Peng, Yihong Qi, and Yong-Chang Jiao. "WIDE SLOT LOOP ANTENNA WITH DISTANCE-ADJUSTABLE BACK-REFLECTOR FOR MULTIPLE NARROWBAND ANTENNAS REPLACEMENT." Progress In Electromagnetics Research 135 (2013): 563–81. http://dx.doi.org/10.2528/pier12102409.

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Steeb, Jan-Willem W., David B. Davidson, and Stefan J. Wijnholds. "Mitigation of Non-Narrowband Radio Frequency Interference Incorporating Array Imperfections." Journal of Astronomical Instrumentation 08, no. 01 (2019): 1940013. http://dx.doi.org/10.1142/s2251171719400130.

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In a recent paper, we presented a non-narrowband spatial radio frequency interference (RFI) mitigation algorithm for radio astronomy arrays. The algorithm constructs a 2nd-order filter by combining a 1st-order subspace subtraction method with a non-narrowband signal model. The model is based on the assumption that the frequency response is approximately flat and that the array is calibrated. In this paper, we consider the effects of array imperfections such as unknown complex gains and mutual coupling, incorporate these into the non-narrowband signal model and extend the RFI mitigation algorit

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CHANG, Dau-Chyrh, Chao-Hsiang LIAO, and Powen HSU. "Performance Analysis of Energy Pattern and Power Patterns for UWB Antenna and Narrowband Antenna." IEICE Transactions on Communications E95-B, no. 1 (2012): 2–9. http://dx.doi.org/10.1587/transcom.e95.b.2.

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Srivastava, Shruti, and Jacob J. Adams. "Analysis of a Direct Antenna Modulation Transmitter for Wideband OOK With a Narrowband Antenna." IEEE Transactions on Antennas and Propagation 65, no. 10 (2017): 4971–79. http://dx.doi.org/10.1109/tap.2017.2734063.

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Kumar, Om Prakash, Pramod Kumar, Tanweer Ali, Pradeep Kumar, and Shweta Vincent. "Ultrawideband Antennas: Growth and Evolution." Micromachines 13, no. 1 (2021): 60. http://dx.doi.org/10.3390/mi13010060.

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Narrowband antennas fail to radiate short pulses of nano- or picosecond length over the broader band of frequencies. Therefore, Ultrawideband (UWB) technology has gained momentum over the past couple of years as it utilizes a wide range of frequencies, typically between 3.1–10.6 GHz. UWB antennas have been utilized for various applications such as ground-penetrating radars, disaster management through detection of unexploded mines, medical diagnostics, and commercial applications ranging from USB dongles to detection of cracks in highways and bridges. In the first section of the manuscript, UW

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Fu, H. Y., W. A. Scales, P. A. Bernhardt, et al. "Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT." Annales Geophysicae 33, no. 8 (2015): 983–90. http://dx.doi.org/10.5194/angeo-33-983-2015.

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Abstract. Observations of secondary radiation, stimulated electromagnetic emission (SEE), produced during ionospheric modification experiments using ground-based, high-power, high-frequency (HF) radio waves are considered. The High Frequency Active Auroral Research Program (HAARP) facility is capable of generating narrowband SEE in the form of stimulated Brillouin scatter (SBS) and stimulated ion Bernstein scatter (SIBS) in the SEE spectrum. Such narrowband SEE spectral lines have not been reported using the European Incoherent Scatter (EISCAT) heater facility before. This work reports the fir

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Zhang, Zhuohang, and Zhongming Pan. "Time Domain Performance of Reconfigurable Filter Antenna for IR-UWB, WLAN, and WiMAX Applications." Electronics 8, no. 9 (2019): 1007. http://dx.doi.org/10.3390/electronics8091007.

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A novel reconfigurable filter antenna with three ports for three dependent switchable states for impulse radio-ultrawideband (IR-UWB)/wireless local area network (WLAN)/worldwide interoperability for microwave access (WiMAX) applications is presented in this paper. Three positive-intrinsic-negative diodes, controlled by direct current, are employed to realize frequency reconfiguration of one ultra-wideband state and two narrowband states (2.4 GHz and 3.5 GHz). The time domain characteristic of the proposed antenna in the ultra-wideband state is studied, because of the features of the IR-UWB sy

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David, D. Jasmine, P. Anitha, K. Ramalakshmi, et al. "Design an Uncertain Model for the Stubbed Ground Plane by Increasing the Bandwidth of the Monopole Antenna." Scalable Computing: Practice and Experience 23, no. 4 (2022): 351–61. http://dx.doi.org/10.12694/scpe.v23i4.2046.

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Uncertainty is stated as the indication of the quality of the calibration certificate. When uncertainties occurred in a stubbed ground plane, it affects the performance of every source. Hence, a thorough analysis of uncertainties on a monopole antenna is required. The proposed research work is to focus on designing a planar monopole antenna to improve the bandwidth with minimal changes on the ground plane mainly for medical applications and to reduce the uncertainty. The narrowband antenna on the ground plane is redesigned to boost up the gain and broadens the monopole antenna’s bandwidth impe

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Yongfeng Wang, Naizhi Wang, Tayeb A. Denidni, Qingsheng Zeng, and Gao Wei. "Integrated Ultrawideband/Narrowband Rectangular Dielectric Resonator Antenna for Cognitive Radio." IEEE Antennas and Wireless Propagation Letters 13 (2014): 694–97. http://dx.doi.org/10.1109/lawp.2014.2314480.

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Bitchikh, M., M. Mokhtari, and W. Rili. "Switchable UWB/narrowband/bi‐bands octagonal antenna using PIN diodes." Electronics Letters 54, no. 8 (2018): 480–82. http://dx.doi.org/10.1049/el.2018.0256.

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Chagharvand, Sahar, Mohamad Rijal Hamid, Muhammad Ramlee Kamarudin, and James R. Kelly. "Wide-to-narrowband reconfigurable Vivaldi antenna using switched-feed technique." Telecommunication Systems 63, no. 4 (2016): 711–17. http://dx.doi.org/10.1007/s11235-016-0150-x.

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Qin, Pei-Yuan, Feng Wei, and Y. Jay Guo. "A Wideband-to-Narrowband Tunable Antenna Using A Reconfigurable Filter." IEEE Transactions on Antennas and Propagation 63, no. 5 (2015): 2282–85. http://dx.doi.org/10.1109/tap.2015.2402295.

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Pahadsingh, Sasmita, and Sudhakar Sahu. "A two port UWB-dual narrowband antenna for cognitive radios." Microwave and Optical Technology Letters 58, no. 8 (2016): 1973–78. http://dx.doi.org/10.1002/mop.29951.

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Khan, Muhammad Irshad, Muhammad Irfan Khattak, Gunawan Witjaksono, et al. "Experimental Investigation of a Planar Antenna with Band Rejection Features for Ultra-Wide Band (UWB) Wireless Networks." International Journal of Antennas and Propagation 2019 (June 2, 2019): 1–11. http://dx.doi.org/10.1155/2019/2164716.

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The Federal Communication Commission (FCC) has authorized the use of unlicensed ultra-wide band (UWB) spectrum in the frequency range from 3.1 to 10.6 GHz for a variety of short-range applications, including wireless monitors and printers, camcorders, radar imaging, and personal area networks (PANS). However, the interference between coexisting narrowband channels and UWB signals that share the same spectrum should be avoided by designing UWB antennas with band notch characteristics. This work presents a printed monopole antenna (PMA) with slots of different shapes etched in the radiating elem

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Kurganov, Vladislav V., and Victor I. Djigan. "Digital antenna array calibration by adaptive algorithms of signal processing." Telecommunications, no. 2 (2021): 8–16. http://dx.doi.org/10.31044/1684-2588-2021-0-2-8-1.

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A method of antenna array calibration, based on the using of the recursive least squares (RLS) adaptive filtering algorithms is discussed. The matrix inversion lemma, the QR-decomposition and the Householder transform based RLS algorithms with quadratic computational complexity can be used for the method implementation in the narrowband adaptive arrays. The proposed calibration method is used in the antenna arrays with digital beam forming. The method demonstrates the ability to estimate and compensate the channel gain errors that ensures the average deviation of the calibrated array radiation

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Rohadi, Erfan, Amalia Amalia, Indrazno Siradjuddin, et al. "Design and Analysis of The IFA Bandwidth Enhancement for 639 MHz UHF Channel." International Journal of Engineering & Technology 7, no. 4.44 (2018): 61. http://dx.doi.org/10.14419/ijet.v7i4.44.26864.

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Bandwidth characteristic enhancement of the antenna is engaging and challenging problems for antenna engineers. The design of the 639 MHz frequency of the low-profile inverted F antenna (IFA) on a finite conducting plane proposed and its characteristics are analyzed numerically. The IFA is typically a narrowband antenna, due to the bandwidth enhancement the antenna parameters are considered. When the size of the conducting plane is 115 mm by 230 mm, the return loss bandwidth (-10 dB) becomes 2.4 % and the gain becomes 6.58 dB. The results found that when the height of the antenna reduced the r

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