A mutual coupling study of linear and circular polarized microstrip antennas for diversity wireless systems

被引:34
作者
Ramirez, RR [1 ]
De Flaviis, F
机构
[1] Los Angeles Unified Sch Dist, Los Angeles, CA 90022 USA
[2] Univ Calif Irvine, Dept Elect & Comp Engn, Irvine, CA 92697 USA
关键词
antenna array mutual coupling; antenna arrays; antenna diversity;
D O I
10.1109/TAP.2003.809089
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, an analysis of mutual coupling is presented to examine the benefits of orthogonal polarizations and patterns for adjacent microstrip antennas. The mutual coup ling between two linear polarized antennas orientated in parallel polarizations (E and H plane) is reduced using low dielectric constant materials. The mutual coupling can be reduced an additional 20-35 dB at the same interelement spacing when adjacent elements are orientated in orthogonal polarizations, 0 plane. Similarly, the mutual coupling between two circular polarized antennas orientated in the parallel polarization is reduced using low dielectric constant materials. However, the reduction in mutual coupling between two circular polarized antenna elements orientated in the O plane is only an additional 1-6 dB. The mutual coupling between a linear polarized sum beam (1/2lambda) and difference beam (1lambda) antenna is reduced 20-35-dB below the case when using identical antennas only in the H- and. O planes. Compact two- and four-element multielement antennas with interelement spacings less than 0.15lambda are fabricated and the S parameters and radiation patterns are measured.
引用
收藏
页码:238 / 248
页数:11
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