电磁波入射角对小型机载天线罩透波率的影响测试

Testing of the Effect of Tncident Angle of Electromagnetic Wave on theWave Pentration Rate of Small Airborne Radome

摘要:

机载天线罩良好的透波率是保证天线系统高效工作重要因素,透波率的除了受天线罩本身状况影响外,还与电磁波的方向、频率、极化等因素有关。为解决天线罩透波率测试系统构建复杂、实现困难、测试误差大等问题,构建了一种天线罩透波率测试系统,并对不同电磁波频率、入射角下天线罩透波率进行测试,通过对平面螺旋天线罩的实测表明：低频段不同的入射角对天线罩透波率造成的影响较小,高频段大入射角时对透波率影响较大。

Abstract:

Good transmittance of airborne radome is an important factor to ensure the efficient operation of antenna system. The transmittance is not only affected by the condition of radome itself, but also by the direction, frequency and polarization of electromagnetic wave. In order to solve the problems complex construction ,difficult realization and large test error of radome transmittance test system,etc.A radome transmittance test system is constructed ,and the radome transmittance under different incident angles electromagnetic wave frequencies is tested. The measured results of planar helical radome show that different incident angles in low frequency band have less influence on the transmittance of radome, while large incident angles in high frequency band have greater influence on the transmittance.