Summary
International Symposium on Antennas and Propagation
2009
Session Number:3A1
Session:
Number:3A1-1
Circularly Polarized Microstrip Patch Antenna With Wide Tunability Range
Kazuhiro Kitatani, Masahiro Wada, Yasuyuki Okamura,
pp.755-758
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
A service of radio communication systems is being diversified. A variety of these usages require a reconfigurable antenna operating at different frequencies and polarization, and being scanned as well. A patch antenna of interest here is one of the typical microstrip antennas. The frequency control of the patch antenna was reported in 1982 using a semiconductor device [1]. Heretofore, the tunable antenna of the linearly polarized wave has been studied a lot. In recent years, the frequency control of the circularly polarized patch antenna has been achieved by using the ferrite [2], the semiconductor [3], and the mechatoronics technology [4]. Here, the reconfigurable antennas using the mechatoronics technologies such as a motor, a piezo-electric actuator, and MEMS (Micro-Electro-Mechanical-System) have been developed. These antennas have a feature of low loss, low cost, and low power consumption although they show a slow response time of the order of millisecond comparing with antennas incorporated with semiconductor devices. We proposed a circularly polarized patch antenna using partial dielectric filling whose resonant frequency is controllable using mechatoronics technology [5]. The control of the operation frequency was able to obtain ten percents by the experiment. In this paper, we propose a circularly polarized patch antenna using partial dielectric filling, the resonant frequency of which is widely controllable. We describe a design of the proposed antenna using the FDTD (Finite Difference Time Domain) method.