Pattern Reconfigurable Metasurface Antenna for Electromagnetic Torso Imaging

被引:54
作者
Darvazehban, Amin [1 ]
Rezaeieh, Sasan Ahdi [1 ]
Zamani, Ali [1 ]
Abbosh, Amin M. [1 ]
机构
[1] Univ Queensland, Sch Informat Technol & Elect Engn, Brisbane, Qld 4072, Australia
关键词
Electromagnetic imaging; metasurface antenna; pattern reconfigurable antenna; SLOT ANTENNA; MICROWAVE; SENSOR; SYSTEM;
D O I
10.1109/TAP.2019.2916576
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
A pattern reconfigurable metasurface antenna for an electromagnetic torso imaging system operating at the ultra-high frequency (UHF) band is presented. To meet the requirements of electromagnetic torso imaging, the antenna can scan the human chest with steerable unidirectional radiation patterns. The designed antenna consists of three rectangular microstrip-fed slot radiators illuminating a metasurface layer with 7x5 unit cells to cover the whole chest. Six p-i-n diodes are used to switch the radiating slots creating different beams. The unit cell dimensions are 0.125 lambda(0) x 0.125 lambda(0) and the antenna has a low profile of 0.9 lambda(0) x 0.7 lambda(0) x 0.06 lambda(0) (lambda(0) is the wavelength of the lowest operating frequency of the antenna). The antenna creates three distinct beams with a peak gain of 8 dBi at 1 GHz and 2 dBi gain variations across different beams over its measured wide operating frequency bandwidth of 27% at 0.8-1.05 GHz. A complete electromagnetic torso imaging system, which utilizes the designed antenna, is built and is successfully tested to detect 20 mL of fluid (water) inside the torso, thus differentiating between healthy and unhealthy cases.
引用
收藏
页码:5453 / 5462
页数:10
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