一种毫米波宽带双圆极化多波束阵列天线  

Dual-Circularly Polarized Millimeter-Wave Wideband Multi-Beam Array

作　　者：罗梁钦 杨毅夫 陈蕾[1] 张天龄[1] Luo Liangqin;Yang Yifu;Chen Lei;Zhang Tianling(Xidian University,Xian Shaanxi,710071)

机构地区：[1]西安电子科技大学,西安710071

出　　处：《测控与通信》2023年第4期23-29,共7页

摘　　要：本文提出了1种可应用于毫米波系统的宽带双圆极化多波束阵列天线。首先,天线单元采用隔板圆极化器实现双圆极化性能。然后,基于脊间隙波导传输线设计了4x4 Butler矩阵网络,并与1×4天线阵列连接进行激励。仿真结果表明,该天线单元在24~28GHz轴比小于3dB,反射系数小于-18dB,极化隔离大于20dB。同时,所设计的Butler矩阵在频带范围内反射系数小于-17dB,幅度误差小于1dB,相位误差小于6°。1×4阵列各端口反射系数小于-15dB,隔离度大于15dB,通过激励端口的切换,该阵列在最大28°波束扫描范围内可实现双圆极化多波束辐射。A broadband dual circularly polarized multi-beam array applied1to millimeter-wave systems is proposed in the article.Firstly,Stepped-septum polarizers are applied in the elements to achieve dual-circularly polarized radiation.Then,a 4×4 Butler matrix network is designed to feed the 1×4 dual-circularly polarized array in which ridge gap waveguide is engaged as the transmission line of the proposed Butler matrix.The simulated results indicate that the element achieves an axial ratio of less than 3dB,a reflection coefficient less than-18dB,and isolation greater than 20dB from 24 to 28GHz.Besides,the Butler matrix achieves a reflection coefficient less than-17dB,a magnitude error less than 1dB,and a phase error less than 6°.The reflection coefficient of the proposed array is less than-15dB,and the isolation is greater than 15 dB.By exciting different ports,the proposed array achieves dual-circularly polarized multi-beam radiation within the scanning angle of 28°.

关 键 词：毫米波 脊间隙波导 宽带 BUTLER矩阵 双圆极化 多波束 

分 类 号：TN8[电子电信—信息与通信工程]