Abstract
Two types of single fed low-profile SIW-like cavitybacked planar slot antennas for circularly polarization (CP) application are designed, fabricated and measured. Firstly, a spoon shaped slot structure cavity-backed by a substrate integrated waveguide (SIW) cavity is proposed to realize the CP performance. Next, a half mode SIW (HMSIW) cavity-backed semi-circle slot antenna is proposed to further reduce the size of the antenna element. Finally, the measured and simulated results validate the proposed antennas.
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