Summary
International Symposium on Antennas and Propagation
2012
Session Number:3C3
Session:
Number:3C3-1
Single-element ZOR Antenna with Circularly Polarization Using CRLH Transmission Line
Mitsuhiro Habuta, Yuto Maejima, Kazuhiro Kitatani, Yasuyuki Okamura,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
Recently, antennas using metamaterials have been studied actively. There have been many reports about leaky wave antennas using a composite right/left-handed transmission line (CRLH-TL), especially microstrip lines. The features of this antenna are that, a wide range beam scanning can be achieved and, a zeroth-order resonator (ZOR), whose phase and amplitude are constant along the line, can be constructed so that a small antenna that does not depend on its size can be fabricated. Circularly polarized antennas using CRLH-TL, antennas using a phase shifter or ground vias have also been researched. On the other hand, we have previously proposed a new structure for a circularly polarized antenna, without using a phase shifter or a ground via. We confirmed the circular polarization operation by analysis and experiments. Our antenna is a leaky wave array antenna. In this paper, we propose a single-element ZOR microstrip antenna with circularly polarization using CRLH-TL without a phase shifter. This antenna does not have ground vias, and can be produced easily and inexpensively. First, we describe the structure and the operation of the proposed antenna, and simulate the results of the generation of the circularly polarized waves. Next, we show the experimental results in detail.