Dual-band Dual-polarization Base Station Antenna Design for 2G～5G Communication
In order to meet the wireless communication requirements of the convergence of multiple communication standards,a cross-dipole base station antenna covering the 2G,3G,LTE,and Sub-6 GHz bands is proposed.Two pairs of±45° orthogonal dipoles are used to achieve the dual polarization of the antenna.The fan-shaped inner ring and diamond-shaped outer ring in the radiation unit correspond to the low-frequency and high-frequency bands to be realized by the antenna,and the independent control of the two frequency bands can be realized by adjusting the structural parameters of the inner ring and the outer ring.A parasitic patch above the antenna is used to optimize antenna impedance matching.Through the production of real objects,the antenna is measured to have a relative bandwidth of 49.9％(1.70～2.80 GHz)and 19.2％(3.20～3.88 GHz)in the two frequency bands,the overall isolation is better than 20 dB,and the cross-polarization ratio of the main visual axis is better than 21 dB and the half-power beam widths of the two bands are 66±5°,78±6°,respectively.Compared with existing studies,this antenna has a simple structure and has significant advantages in cross-polarization and gain.
cross dipolebase station antennarelative bandwidthdual polarizationindependent control5G
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