Circularly Polarized Microstrip Antenna with Reconfigurable Capability Using Ground Slot Perturbations

Seongmin PYO  Jae-Kwan LEE  Min-Jae LEE  Dae-Myoung IN  Young-Sik KIM  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.12   pp.3639-3642
Publication Date: 2010/12/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.3639
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Antennas and Propagation
microstrip antenna,  reconfigurable polarization,  circular polarization,  ground slot perturbation,  

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A novel square patch antenna with reconfigurable circular polarization (CP) is presented in this letter. A circular slot with perturbation is placed beneath the patch. The circular slot that has an inner perturbation yields right-handed CP, but with an outer perturbation slot yields left-handed CP. Experiments show an antenna gain of 2.8 dBic and a 3-dB axial ratio bandwidth of 30 MHz which well match the corresponding simulation results.