强电磁环境对用频设备的影响机理研究

在复杂电磁环境下，尤其是当强场存在时，用频设备的工作状况往往会出现很多意想不到的情况，比如接收机的灵敏度下降、发射机辐射信号存在其它频率分量等。通过深入分析模块化射频器件的工作特性和注入式实物试验，验证了射频电路中非线性器件工作特性变化是导致用频设备工作性能下降的本质机理。通过改变不同试验条件，研究了互调发射、接收机减敏等现象随强干扰信号参数改变的变化规律。研究结果可为强电磁环境下用频设备的合理使用提供借鉴。

Effects mechanism of strong electromagnetic environment to equipment

When facing complex electromagnetic environment , especially strong interfering signals existing , the equipment using frequency always show some unexpected characters , such as sensitivity declining ,some other frequencies power radiating which should not be exist .By injection test to some electronic devices , nonlinear effects are proved to the mechanism of equipment using frequency working performance descent .The disciplines of working performance descent ,such as cross modulation radiation and desensitization ,are also researched according to the different strong interfering signals .This research results could support the correct usages of equipment using frequency in strong interfering signal environment .