Metamaterial Based Electronically-Scanned Circularly-Polarized LWA

• Published in: IEEE transactions on magnetics Vol. 48; no. 11; pp. 4301 - 4304
• Main Authors: Fu, Jiahui, Li, Xinyuan, Wu, Qun, Feng, Chunnan
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01.11.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Circularly-polarized; Cross-disciplinary physics: materials science; rheology; electronically-scanned; Exact sciences and technology; Gain; Leaky wave antennas; leaky-wave antenna; Magnetism; Materials science; metamaterial; Metamaterials; Other topics in materials science; Physics; Power transmission lines; Transmission line antennas; Varactors; Circularly-polarized; metamaterial; electronically-scanned; leaky-wave antenna; Magnetic properties
• ISSN: 0018-9464; 1941-0069
• DOI: 10.1109/TMAG.2012.2199478

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.