Abstract
ABSTRACTIn this letter, a wideband circularly polarized metallic cavity antenna is designed and fabricated. To enhance both the impedance and axial‐ratio bandwidths (ARBWs), an L‐shaped probe is used to produce two orthogonal TE111 modes for left‐hand circular polarization. The measured impedance bandwidth for S11 ≤ −10 dB and 3‐dB ARBW were 1.72 GHz (20.6%, 7.48–9.2 GHz), and 1.5 GHz (17.3%, 7.9–9.4 GHz), respectively. The measured realized gain at broadside was 6.6–9.3 dBic over the overlapped impedance and AR bandwidth 1.38 GHz (16.1%, 7.9–9.28 GHz). The experimental results reveal that the proposed antenna is attractive for satellite communication applications due to its simple metallic structure, good performance, and strong power‐handling capability. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2398–2403, 2014
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