蛋卵形天线罩损伤性能测试方法研究

Egg-shaped Radome Damage Performance Test

摘要:

为了得到蛋卵形天线罩物理损伤对机载火控雷达性能的影响,研究了天线罩透波特性的测量方法,并对破损区域的透波性能和破损天线罩透波一致性进行了测量。选取了透波率和插入相位移作为衡量天线罩透波性能的指标,针对透波率和插入相位移难以测量的问题,提出了通过矢量网络分析仪测量S参数的s21分量间接测量天线透波率和插入相位移的方法。首先对不同损伤程度区域的透波特性进行了测量,结果表明破损区域边缘透波性能下降明显。然后对蛋卵形天线罩横向和轴向上的透波一致性进行了测量,结果表明损伤会影响透波一致性,轴向上插入相位移尤其明显。根据测试结果,物理损伤会影响蛋卵形机载雷达天线罩的透波性能,天线罩出现破损时需及时更换。

Abstract:

In order to obtain the influence of the physical damage of the egg-shaped radome on the performance of the airborne fire control radar, the measurement method of electromagnetic wave transmittance characteristics of the radome was studied, and electromagnetic wave transmittance characteristics of damaged area as well as transmittance consistency of radome were measured. Electromagnetic wave transmittance and insert phase shift were selected to measuring the radome"s wave transmission performance. With regard to problem that electromagnetic wave transmittance and insert phase shift were difficult to measure, the way that measuring s21 component of S parameter by vector network analyzer and indirectly got electromagnetic wave transmittance and insert phase shift was put forward. Firstly, electromagnetic wave transmittance characteristics of different level damaged areas were measured, which indicated that damaged edge areas’ electromagnetic wave transmittance characteristics decrease dramaticly. Horizontal consistency and vertical consistency of egg-shaped radome’s electromagnetic wave transmittance characteristics were also measured, which indicated that damage would affect the consistency of electromagnetic wave transmittance characteristics, especially insert phase shift of vertical consistency. According to measure result, damages would affect electromagnetic wave transmittance characteristics of airborne radar’s egg-shaped radome, and damaged need to be replaced in time.