Compact Circularly Polarized Microstrip Antennas Using EM Coupled Loop Resonators

Junho CHOI; Seongmin PYO; Sang-Min HAN; Young-Sik KIM

doi:10.1587/transcom.E93.B.2658

Special Section on Advanced Technologies in Antennas and Propagation in Conjunction with Main Topics of ISAP2009

Compact Circularly Polarized Microstrip Antennas Using EM Coupled Loop Resonators

Junho CHOI, Seongmin PYO, Sang-Min HAN, Young-Sik KIM

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Keywords: microstrip antenna, circular polarization, coupled feed, ring resonator

JOURNAL RESTRICTED ACCESS

2010 Volume E93.B Issue 10 Pages 2658-2661

DOI https://doi.org/10.1587/transcom.E93.B.2658

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Abstract

In this letter, compact loop resonator type circular polarization (CP) antennas with a square ring and an X-shaped meander loop are presented. Both antennas are fed to a microstrip line with electromagnetic coupling. By adjusting the gap and length of a coupled microstrip line, the magnitude and phase conditions of two orthogonal modes for CP can be determined. The proposed antennas show good axial ratios and also good agreements between experimented and simulated results.

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