期刊
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
卷 62, 期 4, 页码 1817-1829出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2013.2297169
关键词
Bloch-Floquet theorem; circular polarization (CP); composite right/left-handed (CRLH) transmission line structures; leaky-wave antenna (LWA); periodic structure; phase quadrature; series-fed patch (SFP)
资金
- Ziel 2-Programm (EFRE) Transfer.NRW-Science-to-Business PreSeed
This paper includes two contributions. First, it proves that the series and shunt radiation components, corresponding to longitudinal and transversal electric fields, respectively, are always in phase quadrature in axially asymmetric periodic leaky-wave antennas (LWAs), so that these antennas are inherently elliptically polarized. This fact is theoretically proven and experimentally illustrated by two case-study examples, a composite right/left-handed (CRLH) LWA and a series-fed patch (SFP) LWA. Second, it shows (for the case of the SFP LWA) that the axial ratio is controlled and minimized by the degree of axial asymmetry.
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