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Metamaterial Based Electronically-Scanned Circularly-Polarized LWA

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4 Author(s)
Jiahui Fu ; Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China ; Xinyuan Li ; Qun Wu ; Chunnan Feng

An electronically-scanned circularly-polarized leaky-wave antenna (LWA) designed for ETC system is proposed in this paper. Based on the theory of composite right/left-handed (CRLH) transmission line (TL), the proposed antenna can fulfill the beam-scan from -6° to -21° in the half plane continuously at the fixed frequency of 5.8 GHz by tuning the bias voltage of varactors loaded on the CRLH TL. By loading corner-cut square patches, a circularly-polarized radiation is obtained at the main beam, and the maximum gain in the main beam direction keeps above 11 dB.

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Magnetics, IEEE Transactions on  (Volume:48 ,  Issue: 11 )