International Symposium on Antennas and Propagation
Band Rejection Characteristics of Dipole Antenna with Parasitic Element Composed of Composite Right/Left-Handed Transmission Line
Akiyoshi ABE, Naobumi MICHISHITA, Yoshihide YAMADA, Junya MURAMATSU, Toshiaki WATANABE, Kazuo SATO,
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A dipole antenna composed of composite right/left-handed transmission line (CRLH TL) has been proposed . The antenna is composed of lumped or distributed LC elements and interconnecting wires. The CRLH dipole antenna can be miniaturized in the fundamental resonant mode of n = ?1. However, the bandwidth narrows and gain decreases by using CRLH TL as antenna element. In this paper, the right-handed (RH) dipole antenna with the CRLH parasitic element is presented. The proximity effect of the CRLH parasitic element has the feature of the band rejection at the resonant frequency of the original RH dipole antenna. The return loss characteristics are simulated and measured to confirm the band rejection characteristics. The radiation patterns at the resonant and rejection frequencies are also shown.