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A triple‐band composite base station and satellite antenna array for maritime application

机译：A triple‐band composite base station and satellite antenna array for maritime application

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摘要

This paper presents a triple‐band composite antenna array for maritime application. It consists of a three‐element base station antenna array and a waveguide based satellite antenna, which are applied for near‐shore and long distance off‐shore communications, respectively. For the former, it is a ±45° dual polarized array with dipole radiators and covers 2G/3G/4G bands. The three elements are arranged in a form of half hexagon and attain 180° coverage of half power beamwidth (HPBW) in azimuth plane by switching the feeding ports. For the latter, it is a sequentially fed circularly polarized antenna operating in Ku‐band and has a wide HPBW through loading a dielectric structure. To validate the design idea, a prototype is fabricated and measured. Experimental results show that the base station antenna array achieves wide bandwidth of 49.14% from 0.66 to 1.09 GHz and 46.58% from 1.68 to 2.7 GHz with VSWR < 1.5. Meanwhile, the satellite antenna has a wide 3‐dB axial ratio (AR) bandwidth of 20.1% from 12.1 to 14.8 GHz with reflection coefficients lower than −15 dB. Within the band, the HPBW is larger than 90° and the 3‐dB AR beamwidth covers the HPBW.

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