Single-Arm Archimedean Spiral Antenna with Broadband Circular Polarization

被引：3
|
作者：
Fang, Qingyuan [1 ,2 ]
Jin, Mengzhe [1 ]
Liu, Weidong [1 ]
机构：
[1] Shijiazhuang Tiedao Univ, Hebei Key Lab Electromagnet Environm Effects & In, Shijiazhuang 050003, Hebei, Peoples R China
[2] Army Engn Univ PLA, Natl Key Lab Electromagnet Environm Effects, Shijiazhuang Campus, Shijiazhuang 050043, Hebei, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ANTENNAS AND PROPAGATION | 2021年 / 2021卷
关键词：
BEAM; MINIATURIZATION;
D O I：
10.1155/2021/6623468
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 paper, a single-arm Archimedean spiral (SAAS) antenna with broadband circular polarization is investigated. Unlike traditional single-arm Archimedean spiral antenna, the antenna arm consists of a hybrid meandered strip line and a smooth arc strip line. Especially at low frequencies, the meandered strip line significantly improves the circular polarization performance by extending the antenna surface current path. The effects of the meandered strip line on the radiation pattern and axial ratio (AR) are studied in detail. To obtain unidirectional radiation, a metallic cavity is added below the SAAS antenna. The measurement results show that the voltage standing wave ratio (VSWR) is less than 2 from 0.88 GHz to 8.82 GHz, which indicates a wide impedance bandwidth of 1 : 10 is realized. A wide AR bandwidth of 1 : 5 is available, that the measured AR is less than 3 dB from 1.6 GHz to 8 GHz.
引用
收藏
页数：15
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