Abstract
A dual-frequency circularly polarized microstrip antenna with wider beams and higher gain at low-angle is proposed in this paper, which is fed by a proximity-coupled microstrip-line. The proposed antenna has no 90-degree hybrid coupler for circular polarization and allows easy connection between a microstrip line and an antenna element. The simulated results verify the circular polarization and show that good return loss and axial ratio characteristics have been obtained.
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