Abstract
AbstractIn this article, a novel single‐layer dual‐band circularly polarized (CP) metasurface antenna for maritime applications is proposed. The metasurface is composed of 4 × 4 hexagonal patches with two different sizes printed on one side of the low‐profile FR4 substrate, while a slot antenna is printed on the other side. A slit is etched in the middle of each hexagonal patch to enhance modal significance, forcing the current flows to be orthogonal to each other at different modes, generating CP waves as identified with characteristic modal analysis. The proposed antenna has been fabricated and measured. Simulated and measured results match well, of which the impedance bandwidth is 55.96% (4.8–8.53 GHz), 3 dB axial ratio bandwidth is 2.7% from 5.46 to 5.61 GHz with a maximum gain of 9.58 dBic and 8.2% from 7.86 to 8.53 GHz with a maximum gain of 9.02 dBic. The proposed antenna is structurally stable, and is applicable for maritime radio navigation and communication services.
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