Abstract
ABSTRACT In this article, we propose a wide square-slot CPA loaded with a semi ellipse patch. The proposed antenna consists of a sequential rotation feeding structure, a square-slot ground-plane with corner cuts, and an asymmetric U-shaped feeding strip. In contrast to the traditional strips and slots etched into the square-slot ground-plane, semi ellipse patch is first inserted into the ground-plane to increase the antenna bandwidth. In addition, four rectangular slots are used to adjust the impedance matching. The slot CPAA could excite multipole CP resonant modes using these slots and patches, which result in the wideband radiation. The proposed slot CPAA has outstanding characteristics of 85.7% (2.0–5.0 GHz) −10-dB IBW and 68.3% (2.20–4.48 GHz) 3-dB ARBW, which would be a potential candidate in the wideband communication.
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