Cavity Backed Circularly Polarized Spiral Antennas

被引:0
|
作者
Mehrabani, A. [1 ]
Shafai, Lotfollah [1 ]
机构
[1] Univ Manitoba, Dept Elect & Comp Engn, Winnipeg, MB R3T 5V6, Canada
关键词
Circular polarization; Archimedean spiral antennas; metallic cavity; absorbing materials;
D O I
暂无
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 cavity backed spiral antenna is introduced. The antenna is a four-arm Archimedean spiral antenna. To effectively direct the radiation in the upper half space region, the spiral antenna is backed by a conducting cavity, which is peripherally filled by an absorber ring. Antenna radiates circularly polarized waves. The height of the surrounding cavity is only 7mm, which leads to an extremely low profile structure. The polarization purity and antenna gain are investigated over a wide frequency bandwidth of near 1 to 8GHz.
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页数:2
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