L波段极化可重构的圆极化滤波天线设计  

Design of Circular Polarization Filter Antenna with L Band Polarization Reconfigurable

作　　者：赵丹阳 崔恒荣 史振 ZHAO Dan-yang;CUI Heng-rong;SHI Zhen(School of Information Science and Technology,Donghua University,shanghai 201620,China)

机构地区：[1]东华大学信息科学与技术学院,上海201620

出　　处：《无线通信技术》2021年第1期38-42,共5页Wireless Communication Technology

基　　金：中科院重点实验室开放课题(20190918)。

摘　　要：本文提出了一种工作于L波段的极化可重构圆极化滤波天线,该天线由方形贴片辐射单元、滤波馈电网络和开关电路三个部分组成。其中,滤波馈电网络由一个3dB微带电桥和多个微带半波长开环谐振器构成,可以产生两路相位差90°/-90°的信号,并通过探针激励方形贴片以产生圆极化波。通过开关电路切换,可以控制滤波馈点网络的两路输出相位差为90°或-90°,进而控制天线的极化旋向。制作了天线实物并通过实验测试对其性能进行了验证。测试结果表明,本次设计的极化可重构圆极化滤波天线在两种极化状态下的工作带宽均为350MHZ/400MHz,轴比带宽均约为130MHZ/120MHz,其在通带上下边100MHz处的边带抑制均在-10dB左右。该天线可作为未来卫星导航和通信系统的天线候选方案。In this paper,a polarization reconfigurable circular-polarization filter antenna workingin L-band is proposed.The antenna consists of three parts:square patch radiation unit,filter feed network and switching circuit.Among them,the filter feed network is composed of a 3 dB microstrip bridge and multiple microstrip half-wavelength open-loop resonators,which can generate signals with a phase difference of 90°/-90°between the two channels,and excite the square patch through the probe to generate circular polarization waves.By switching the circuit,the phase difference between the two output channels of the filtered feed-point network can be controlled to be 90°or-90°,and then the polarization rotation of the antenna can be controlled.The real antenna is made and its performance is verified by experimental tests.The test results show that the designed polarization reconfigurable circular polarization filter antenna has an operating bandwidth of 350 MHZ/400 MHz in both polarization states,an axial ratio bandwidth of about 130 MHZ/120 MHz,and a sideband suppression of about-10 dB at 100 MHz below the passband.The antenna can be used as a candidate antenna for future satellite navigation and communication systems.

关 键 词：圆极化 可重构 耦合谐振器对 卫星通信 

分 类 号：TN828.5[电子电信—信息与通信工程]