Monofilar Spiral Slot Antenna for Dual-Frequency Dual-Sense Circular Polarization

被引：75
作者：
Bao, Xiu Long [1 ]
Ammann, Max J. [1 ]
机构：
[1] Dublin Inst Technol, Antenna & High Frequency Res Ctr, Dublin 8, Ireland
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2011年 / 59卷 / 08期
基金：
爱尔兰科学基金会;
关键词：
Dual circular polarization; dual frequency; spiral slot antenna;
D O I：
10.1109/TAP.2011.2158964
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：
A dual-band antenna with right-hand circular polarization for the first frequency and the counter polarization at the second frequency is realized with compact printed spiral slots. The coupled spiral slots are fed by a 50 Omega microstrip line. Dual-sense circularly-polarized performance is achieved by realizing oppositely-directed current rotation for the two frequency bands. A parametric study shows that the additional slot significantly improves the bandwidth for both frequency bands. Measured results show that the fractional impedance bandwidth is greater than 18% for both bands. The 3 dB axial-ratio bandwidths are 4.5% and 3.5% for the RHCP and LHCP bands, respectively.
引用
收藏
页码：3061 / 3065
页数：5
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