Circularly Polarized MSA with Suspended L-shaped Strip for ISM Band Application

摘要

The broadband circular polarized (CP) microstrip patch antenna (MSA) for ISM band (2.4 GHz) applications is proposed. The proposed antenna consists of a suspended square ring along with corner-chopped square shape slot and a suspended horizontal L-shaped strip line. Two cylindrical probes which connect L-shaped strip and radiating patch are used to feed patch at two different positions. This feed network of two probes excited two orthogonal signals of equal magnitude which generated CP radiation. The protocol of proposed antenna is simulated and fabricated, and experimental results shows that 10 dB impedance bandwidth of 21.75% (2.13-2.65 GHz), 3 dB axial ratio bandwidth of 19.6% (2.16-2.60 GHz), and measured simulated gain over 3 dB axial ratio (AR) are 7.16 dBi.