基于馈源固定的双频扫描反射阵设计  

A Dual-band Beam-scanning Reflectarray with Fixed Feed Position

作　　者：张莹 左乐 李洋 何清明 ZHANG Ying;ZUO Le;LI Yang;HE Qingming(Science and Technology on Electronic Information Control Laboratory,Chengdu 610036,China)

机构地区：[1]电子信息控制重点实验室,四川成都610036

出　　处：《无线电工程》2022年第2期326-332,共7页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：提出了一种适用于双频反射阵的波束扫描方法,采用固定馈源仅通过旋转反射阵面实现了双频反射阵的波束扫描。定量对旋转前后的反射阵口面相位分布进行了理论分析,推导出波束扫描角与阵面旋转角的解析关系,揭示了该方法的宽带特性。采用反射阵阵列理论进行验证,在此基础上,设计了一款工作于1.575和2.4 GHz的双频扫描反射阵,并最终在60°空域范围内获得了较好的双频扫描特性,验证了设计方法的有效性。A method of reflectarray antenna is proposed,which realizes dual-band beam-scanning while keeping the feed fixed.First,the beam-scanning mechanism is explained by analyzing the phase distribution of the aperture field employing theoretical formulations,which reveals the wideband potential of the proposed method.The beam-scanning capability is verified by the array theory.Then a reflectarray antenna operating at 1.575 and 2.4 GHz is designed.Finally,the results indicate that a scan angle as wide as 60°can be achieved,which validates the effectiveness of the proposed beam-scanning method.

关 键 词：反射阵 馈源固定 波束扫描 阵列理论 双频 

分 类 号：TN823[电子电信—信息与通信工程]