A Compact Two-Port Integrated UWB and Frequency Reconfigurable Antenna System for Cognitive Radio Application

Jiao, Xingxing; Wang, Junhong; Ying, Ziwei

doi:10.1109/ieee-iws.2019.8804119

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…The literature contains a number of designs for antennas that can be reconfigured between UWB/wideband and narrowband performance. However, most of those designs [6][7][8][9][10][11][12] provide an omni-directional radiation pattern within both modes of operation. The geometry of many of the designs is complex [7], [8], [11].…”

Section: Introductionmentioning

confidence: 99%

Liquid Metal Bandwidth-Reconfigurable Antenna

Alqurashi

Kelly

Wang

et al. 2020

Antennas Wirel. Propag. Lett.

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This paper shows how slugs of liquid metal can be used to connect/disconnect large areas of metalisation and achieve radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwidth between ultra-wideband and narrowband by connecting/disconnecting the ground plane for the feedline from that of the radiator. This could be achieved by using conventional semiconductor switches. However, such switches provide point-like contacts. Consequently, there are gaps in electrical contact between the switches. Surface currents, flowing around these gaps, lead to significant back radiation. In this paper, slugs of liquid metal are used to completely fill the gaps. This significantly reduces the back radiation, increases the boresight gain, and produces a pattern identical to that of a conventional microstrip patch antenna. Specifically, the realised gain and total efficiency are increased by 2 dBi and 24%, respectively. The antenna has potential applications in wireless systems employing Cognitive Radio and Spectrum Aggregation.

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Section: Introductionmentioning

confidence: 99%

Liquid Metal Bandwidth-Reconfigurable Antenna

Alqurashi

Kelly

Wang

et al. 2020

Antennas Wirel. Propag. Lett.

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An Annular Shaped Two-Port MIMO Antenna For Ultra Wide Band Frequency Range Applications

Mangal

Kumar

2021

2021 International Conference on Disruptive Technologies for Multi-Disciplinary Research and Applications (CENTCON)

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Our paper presents the design of a unique annular ring-shaped planar monopole antenna with octal geometry intended for a broad spectrum of frequency applications. Utilizing FR4 epoxy for the substrate and copper material for the top patch, the antenna measures 39 mm × 30 mm × 1.6 mm. It exhibits resonance at 6.8 GHz, with a return loss of -49.01 dB. The antenna demonstrates a broad frequency range from 2.1 GHz -13.1 GHz, resulting in an overall -10 dB bandwidth of 11 GHz. At the resonating frequency of 6.8 GHz, the antenna accomplished a total gain of 3.01 dBi and a peak gain of 5.87 dBi at 12.4 GHz. Additionally, it attains a high radiation efficiency of 95.26%. This antenna is a versatile replacement for multiple antennas catering to various frequency bands.

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