Liquid Metal Bandwidth-Reconfigurable Antenna

被引：38

作者：

Alqurashi, Khaled Yahya ^{[1
]}

Kelly, James R. ^{[2
]}

Wang, Zhengpeng ^{[3
]}

Crean, Carol ^{[4
]}

Mittra, Raj ^{[5
,6
]}

Khalily, Mohsen ^{[1
]}

Gao, Yue ^{[2
]}

机构：

[1] Univ Surrey, Inst Commun Syst, Dept Elect & Elect Engn, Guildford GU2 7XH, England

[2] Queen Mary Univ London, Sch Elect Engn & Comp Sci, London E1 4NS, England

[3] Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China

[4] Univ Surrey, Dept Chem, Guildford GU2 7XH, England

[5] Univ Cent Florida, Electromagnet Commun Lab, Orlando, FL 32816 USA

[6] King Abdulaziz Univ, Jeddah 21589, Saudi Arabia

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2020年 / 19卷 / 01期

基金：

英国工程与自然科学研究理事会;

关键词：

Bandwidth reconfiguration; cognitive radio (CR); liquid metal; microstrip antenna; monopole antenna; reconfigurable antennas; spectrum aggregation; ultrawideband (UWB) antennas; SLOT ANTENNA;

D O I：

10.1109/LAWP.2019.2959879

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This letter shows how slugs of liquid metal can be used to connect/disconnect large areas of metalization and achieve a radiation performance not possible by using conventional switches. The proposed antenna can switch its operating bandwidth between ultrawideband 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 letter, the slugs of a liquid metal are used to completely fill the gaps. This significantly reduces the back radiation, increases the bore-sight gain, and produces a pattern identical to that of a conventional microstrip patch antenna. Specifically, the realized gain and total efficiency are increased by 2 dBi and 24%, respectively. The antenna has potential applications in wireless systems employing cognitive radio (CR) and spectrum aggregation.

引用

页码：218 / 222

页数：5

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