中圖分類號(hào)：TN82 文獻(xiàn)標(biāo)志碼：A DOI: 10.16157/j.issn.0258-7998.234361
中文引用格式： 王麗黎，徐亞妮，高智勇，等. 小型化低剖面全向?yàn)V波天線設(shè)計(jì)[J]. 電子技術(shù)應(yīng)用，2024，50(2)：88-92.
英文引用格式： Wang Lili，Xu Yani，Gao Zhiyong，et al. Miniaturized low-profile filtering omnidirectional antenna design[J]. Application of Electronic Technique，2024，50(2)：88-92.

Miniaturized low-profile filtering omnidirectional antenna design

Abstract： A miniaturized omnidirectional microstrip filter antenna is designed. The antenna is composed of a bandpass filter and a microstrip antenna, which share a ground plane to reduce the size and are connected by gap coupling. The bandpass filter is etched at the feeder position of the microstrip patch antenna, and the frequency selection filter function is introduced. A transverse rectangular patch is added at the front end of the input feeder to achieve good impedance matching of the whole system. Compared with the traditional microstrip antenna, the designed filter antenna introduces the frequency selection filter function without changing the size, and shows high selectivity at the edge of the passband. The simulation and test results show that the impedance bandwidth of the filter antenna is 2.31 GHz~2.56 GHz, and the gain in the passband is flat, the average gain is about 2.1 dBi, and the filter antenna has omnidirectional radiation characteristics in the working frequency band.

Key words : filtering antenna；microstrip antenna；miniaturized；omnidirectional antenna；bandpass filter