High-Order Characteristic Modes Suppression for Cross-Band Decoupling in Shared-Aperture Antenna Array  

作　　者：LU Xiaochi CHEN Yikai SHEN Tongsheng GUO Shaojun ZOU Chunrong YANG Shiwen 

机构地区：[1]School of Electronic Science and Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China [2]National Innovation Institute of Defense Technology,Academy of Military Sciences PLA China,Beijing 100071,China

出　　处：《Chinese Journal of Electronics》2022年第6期1121-1128,共8页电子学报（英文版）

摘　　要：In dual-band shared-aperture base station antennas,the secondary radiation(SR)field caused by cross-band couplings always leads to radiation pattern distortion.In this work,the SR field caused by the coupling is attributed to the excitation of the target highorder modes from the perspective of the characteristic mode.To effectively suppress the target modes,L-shaped slots are proposed to load the arms of the radiator and altering the current paths.As compared with conventional dipoles without L-shaped slots,the proposed antenna generates less SR field.Therefore,the radiation pattern of the high-band antennas keeps stable in a dual-band shared-aperture antenna array environment.Prototype of a dual-band antenna array consisting of the proposed lowband(LB)antenna and a 4×4 high-band(HB)antenna array is fabricated.Simulated and measured results show that the designed dual-band array operates at both 0.74–0.82 GHz and 3.30–3.80 GHz.The experimental results verify that the cross-band decoupling has been achieved with the high-order mode suppression.

关 键 词：Characteristic modes(CMs) Base station antenna Shared-aperture antenna High-order modes suppression 

分 类 号：TN929.5[电子电信—通信与信息系统] TN820[电子电信—信息与通信工程]