机载天线方向图外场测试技术研究  

Outfield Testing Technology for Airborne Antenna Radiation Pattern

作　　者：赵东涛[1] 徐宏宇 ZHAO Dong-tao;XU Hong-yu(Chinese Flight Test Establishment,Xi'an 710089,China;Chinese North Industries Corporation,Beijing 100053,China)

机构地区：[1]中国飞行试验研究院,陕西西安710089 [2]中国北方工业有限公司,北京100053

出　　处：《测控技术》2022年第10期114-118,共5页Measurement & Control Technology

基　　金：国防科工局技术基础科研项目(JSJC2017205B111)。

摘　　要：机载天线装机后,受到机身和机翼的遮挡影响以及载机平台的耦合和散射作用,实际覆盖范围会发生变化,从而引起天线方向图的畸变,使得天线的性能偏离预期效果。在暗室内进行整机天线方向图测量不仅要求暗室静区尺寸足够大,而且对暗室低频性能的要求也很高,因此,室外露天测量是一种可替代的方法。设计了装机天线外场环境测试平台,提出了一种装机天线外场天线方向图校准方法,能够对外场装机天线不同频点的方向图等参数进行测试和校准。外场试验结果验证了所提方法的有效性。After being installed on the aircraft,the actual coverage area of the airborne antenna will change due to the shielding effect of the fuselage and wings as well as the coupling and scattering effect of the platform,which cause the antenna radiation pattern distortion and the deviation of antenna performance from the expected effect.The measurement of antenna radiation pattern in darkroom requires not only sufficient size of the static area,but also the low frequency performance of the darkroom.Therefore outdoor measurement is a relatively feasible method.A testing platform and calibration method for the outdoor testing of installed antenna are designd,which can be used for the measurement and calibration of such performance parameters as antenna radiation pattern of the installed antenna in different frequencies and enables the compensation for the beam coverage and distortion.The test results show that the proposed method is feasible for the outfield testing and calibration of installed antenna.

关 键 词：机载天线 外场校准 畸变 天线方向图 

分 类 号：V216[航空宇航科学与技术—航空宇航推进理论与工程] TN957.52[电子电信—信号与信息处理]