Title :
Metamaterial Based Electronically-Scanned Circularly-Polarized LWA
Author :
Fu, Jiahui ; Li, Xinyuan ; Wu, Qun ; Feng, Chunnan
Author_Institution :
Sch. of Electron. & Inf. Eng., Harbin Inst. of Technol., Harbin, China
Abstract :
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.
Keywords :
antenna radiation patterns; leaky wave antennas; metamaterial antennas; microwave antennas; transmission line theory; varactors; beam-scan; bias voltage tuning; circularly-polarized LWA; circularly-polarized radiation; composite right/left-handed transmission line; corner-cut square patches; electronic toll collection; electronically-scanned LWA; frequency 5.8 GHz; half plane; leaky-wave antenna; metamaterial; varactors; Gain; Leaky wave antennas; Metamaterials; Power transmission lines; Transmission line antennas; Varactors; Circularly-polarized; electronically-scanned; leaky-wave antenna; metamaterial;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2012.2199478
