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A wideband circularly polarized cavity-backed patch antenna excited by substrate integrated coaxial line (SICL) is proposed in this letter. The antenna is composed of two corner truncated rectangular patches, two L-shaped patches, a backed cavity, and an I-shaped feed network. The four patches and the feed network generate a circularly polarized radiation pattern in a sequential-rotation method. The...
In this paper, a wideband substrate integrated waveguide (SIW) cavity backed patch antenna element is proposed for high-gain arrays at millimeter-wave bands. By compensating the inductance of the feeding metallic via with a capacitive ring slot on the ground plate, an additional resonance is introduced to the patch mode to expand the bandwidth. To suppress the backward radiation from the slot and...
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