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A Circular Microstrip Antenna with a Cross Slot for Circular Polarization
Hisao IWASAKI Kazuaki KAWABATA
IEICE TRANSACTIONS on Communications
Publication Date: 1991/10/25
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Mobile Communication Antennas)
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A new circularly polarized microstrip antenna fed by a cross slot using an aperture coupled feed is proposed. The proposed antenna has no 90 degree hybrid coupler for circular polarization and allows easy connection to microwave devices for electronical beam scanning. In this paper, the conditions for circular polarization in this new antenna are derived, and the measured results are also described to verify the authors' proposed conditions for circular polarization. Good return loss and axial ratio characteristics have been obtained.