Cavity-Backed Broadband Circularly Polarized Cross-Dipole Antenna

被引：37

作者：

Feng, Yao ^{[1
]}

Li, Jianying ^{[1
]}

Cao, Bao ^{[1
]}

Liu, Jie ^{[1
]}

Yang, Guangwei ^{[1
]}

Wei, Du-Juan ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Sch Elect & Informat, Xian 710072, Shaanxi, Peoples R China

来源：

IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS | 2019年 / 18卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Dipole antennas; Broadband antennas; Antenna radiation patterns; Antenna measurements; Bandwidth; Broadband communication; Back cavity; broadband antenna; circular polarization; crossed dipole; gain; WIDE-BAND; MAGNETOELECTRIC DIPOLE; DESIGN;

D O I：

10.1109/LAWP.2019.2948710

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 presents a broadband circularly polarized (CP) cross-dipole antenna. It consists of crossed dipoles, parasitic elements, a cavity-backed reflector, and a circular ring reflector. The arms of crossed dipoles are divided into two sectors by a slit. The parasitic elements are utilized to significantly enhance the CP bandwidth. A circular ring reflector is adopted to optimize the radiation pattern and improve the gain in high frequency band. The fabricated prototype of the proposed antenna with an overall size of 0.60(0) 0.60(0) 0.21(0) ((0) is the free-space wavelength at the lowest CP operating frequency) yields a measured impedance bandwidth of 98.2 for S-11 <-10dB (1.73-5.07GHz) and a 3dB axial-ratio bandwidth of 85.5 (1.94-4.84GHz). The antenna has stable radiation patterns from 1.94 to 4.5GHz and exhibits a right-hand circular polarization with a peak gain of approximately 10.0dBic at 3.6GHz.

引用

页码：2681 / 2685

页数：5

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