Front-to-back ratio improvement of printed antennas based on electrically small resonators for microwave presence detectors

被引：4
|
作者：
Aguila, P. [1 ]
Zuffanelli, S. [1 ]
Zamora, G. [1 ]
Paredes, F. [1 ]
Martin, F. [1 ]
Bonache, J. [1 ]
机构：
[1] Univ Autonoma Barcelona, CIMITEC, Dept Engn Elect, Bellaterra 08193, Spain
来源：
ELECTRONICS LETTERS | 2015年 / 51卷 / 11期
关键词：
D O I：
10.1049/el.2014.4303
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：
The improvement of the front-to-back ratio (FBR) in low-profile antennas to be used in presence detection devices is explored. The main idea is to use electrically small resonators as radiating elements. This minimises the electric currents in the boundary of the ground plane at the working frequency, thus reducing the backward radiation. The choice of the resonant particle and its electromagnetic properties, along with the antenna structure, are discussed. The simulated results indicate that there is good impedance matching (-18 dB) at the operating frequency (3 GHz) and an excellent FBR of 24 dB. These characteristics are validated experimentally and the FBR is compared with that of a conventional patch antenna.
引用
收藏
页码：836 / 837
页数：2
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