High Selectivity and High Gain X-Band Waveguide Filtering Antenna Based on Triple-Mode Resonator

被引：31

作者：

Xiang, Kai-Ran ^{[1
]}

Chen, Fu-Chang ^{[1
]}

Chu, Qing-Xin ^{[1
]}

机构：

[1] South China Univ Technol, Sch Elect & Informat Engn, Guangzhou 510640, Peoples R China

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2021年 / 69卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Filtering antenna; high gain; high selectivity; rectangular cavity; slot; triple-mode resonator; ARRAY;

D O I：

10.1109/TAP.2021.3070629

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：

In this communication, a high-selectivity and high-gain filtering slot antenna operating in X-band is designed based on a triple-mode cavity resonator. Three modes of the cavity resonator, namely, TE101, TE011, and TM110, are excited by properly selecting the position and size of the coupling aperture. By adjusting the frequency and external coupling of the three modes, transmission zero can be introduced on both sides of the passband, achieving high selectivity of antenna gain. Because the cavity has a high unload quality factor, the radiation efficiency in the passband is high and flat. In order to increase the gain of the filtering waveguide antenna, a grid-slotted patch is added on the top of the slot. To demonstrate the concept, an X-band waveguide filtering antenna is designed and fabricated. Measured results show the filtering antenna can obtain a gain of greater than 8.5 dBi in the frequency range of 9.8-10.2 GHz.

引用

页码：6953 / 6958

页数：6

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