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A new microstrip antenna with frequency and polarization diversity is presented in this paper. A corner truncated square patch separated from the corner segment by a narrow slot is employed to change polarization sense. Frequency diversity is obtained by making the size of the corner segment larger than the truncated corner portion of the patch. A PIN diode is installed between the patch and the corner...
This paper describes a novel microstrip patch antenna with switchable circular polarization. A square patch whose two top corners are truncated by a square portion is used to realize the proposed antenna. Two Schottky diodes connected in the opposite direction are used to correlate the separated corner segments with the patch by their switching operation. As a result, RHCP and LHCP can be alternated...
Design of a microstrip array antenna to achieve dual circular polarization is proposed in this paper. The proposed antenna is a 2×2 array antenna where each patch element is circularly polarized. The feed network has microstrip lines, cross slot lines and air-bridges. The array antenna can excite both right-hand circular polarization (RHCP) and left-hand circular polarization (LHCP) without using...
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