舰载塔康天线波束空域扫描的耦合效应分析

针对舰载塔康(TACAN)天线安装架设位置特殊性需求，为解决天线阵列受到电扫描和机械扫描同时作用影响系统测角问题，建立了天线阵列接收信号的数学模型，分析了电扫描和机械扫描对天线阵列波束空域扫描的耦合效应，研究了耦合效应对舰载塔康系统测角性能的影响。理论推导和计算机仿真结果表明，天线接收信号受到阵元馈电频率、天线机械扫描速率以及阵列结构的共同影响，接收信号的周期性不再是馈电信号的频率，且其频谱发生了扩展。通过对机载天线接收信号进行有效滤波处理，可确保舰载塔康系统测角正常工作。

Coupling effect analysis of shipboard TACAN antenna beam spatial scanning

According to the special requirement of shipboard Tactical Air Navigation System(TACAN) antenna installation position,in order to solve system angle measurement problem that electric scanning and mechanical scanning of antenna array exist at the same time,this paper establishs the mathematical model of the antenna array receiving signals,analyzes the coupling effect of antenna array beam scanning airspace by electric scanning and mechanical scanning,and discusses the influence of coupling effect on shipboard TACAN system angle measuring performance.Theoretical analysis and computer simulation results show that the received signal is affected by the antenna feeding frequency,mechanical scanning rate and array structure,the frequency of received signal is different from that of feeding signal and the spectrum is expanded.Through filtering the airborne antenna signal effectively,the angle measurement function of shipboard TACAN system can be ensured.