Broadband Phased-array Antenna Design Based on 5G Communication
A circularly polarized microstrip phased array antenna that can achieve azimuth±40 ° beam scanning in the 5G frequency band is proposed.The phased array antenna element is composed of a rectangular patch,upper and lower dielectric plates,a slot coupled feed structure and a metal reflective plate.The feed form of phased array antenna is realized by using the one-eighth unequal power divider of Chebyshev synthesis method.The test results show that the standing wave ratio bandwidth of the array antenna is 3.25 GHz～3.69 GHz,the port isolation is greater than 25 dB,the maximum gain during scanning is 21 dB,the gain fading is less than 3 dB,and the axial ratio at the maximum scanning angle is 2.89 dB.The antenna has the advantages of low profile,high isolation,high gain and good beam scanning performance.
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