Abstract
AbstractA microstrip antenna consists of F‐shaped radiating structure with symmetrical F‐shaped modified or defected ground plane look‐like dipole antenna featured for broad axial ratio bandwidth (ARBW) is presented. Modified/defected ground plane comprises of an optimized rectangular ground plane united with symmetrically inverted F‐shaped structure printed at the bottom side of substrate. Furthermore, a narrow rectangular slit was imprinted from the modified ground plane to obtain broad ARBW. Proposed antenna optimized, fabricated, and experimentally examined. Measured results confirm that it can yield an fractional impedance bandwidth of approximately ≈37.5% and a 3‐dB ARBW of ≈31.7%. The measured gain range from 2 dB to 4 dB within the 3‐dB ARBW with maximum gain of 4 dBic. The cross polar rejection was observed better than 15 dB alongwith wide −3 dB beamwidth of 85°.
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