Summary
International Symposium on Antennas and Propagation
2010
Session Number:4FC2
Session:
Number:4FC2-2
Circularly Polarized Square Microstrip Antenna Fed by Proximity Coupling
Junho Choi, Sang-Min Han, Seongmin Pyo, Young-Sik Kim,
pp.-
Publication Date:2010/11/23
Online ISSN:2188-5079
Summary:
Circularly polarized (CP) patch antennas have been paid much attention to mobile wireless and satellite communications because they provide for greater flexibility in orientation angle between transmitter and receiver antennas, better mobility and weather penetration, and reduction in multipath reflections [1]. Although CP antennas can improve the system sensitivity, they have a disadvantage of a complex dual feedline and a relatively large form-factor [1, 2]. The degenerating methods such as notches and/or slots on a radiator have been reported for CP operation of an antenna that has no dual feedline [3-5]. However, these methods yield an antenna gain decrement. In this paper, a square patch antenna fed by proximity coupling for CP operation is presented. Due to the coupling structure, the proposed feeding structure achieves impedance matching by controlling the coupling factor without redesigning the radiating element. Therefore, the proposed antenna can radiates with non-distorted CP and cannot alter the resonant frequency of the patch itself.