装备发射端口匹配条件下屏蔽多芯线耦合连续波强场电磁辐射效应等效测试方法

Equivalent Test Method for Continuous-wave High-field-intensity Electromagnetic Radiation Effects of Shielded Multi-core Wire Coupled Channel Under Matched Conditions of Equip-ment Transmitting Ports

针对当前对大型武器装备进行屏蔽多芯线缆耦合通道强场连续波电磁辐射效应测试难度巨大的问题,建立了屏蔽多芯线耦合通道大电流注入等效替代强场电磁辐射的理论模型,计算出了辐射和注入条件下的受试设备中各线对终端的差模响应。以两种条件下每一组线对终端的差模响应相等作为等效依据,发现在发射端口阻抗匹配的条件下,各线对的注入激励源与辐照场强的等效对应关系是线性的、相等的,且与受试端内各线对连接的终端阻抗无关。提出了装备发射端口匹配条件下屏蔽多芯线耦合连续波强场电磁辐射效应等效测试方法,并进行了试验验证。试验结果表明:当其中一组线对等效时,其余各线对也已经实现了等效。即使受试端的阻抗发生了非线性变化,各线对的最大误差小于3 dB,验证了测试方法的有效性。

It is difficult to test the high-field-intensity electromagnetic radiation effects of shielded multi-core wire cou-pling channel for large weapons and equipment.Thus,a theoretical model of shielded multi-core wire coupling channel with bulk current injection as an equivalent substitute for high-field-intensity electromagnetic radiation is established.The differential mode response of each wire pair of the test equipment under radiation and injection conditions is calculated.The equality of the differential mode response of each wire pair under the two conditions is taken as the equivalent basis,and it is found that,under the conditions of impedance matching at the transmitting port,the equivalent correspondence relationship between injected source and field intensity of each wire pair is linear and equal,and independent of the ter-minal impedance of each wire pair connection within the test end.The equivalent test method for continuous-wave high-field-intensity electromagnetic radiation effects of shielded multi-core wire coupling channel under matched condi-tions of equipment transmitting ports is proposed and experimentally verified.The test results show that when one set of pairs is equivalent,the remaining pairs have also achieved equivalence.Even if the impedance of the test end changes nonlinearly,the maximum error of each wire pair is less than 3 dB,which verifies the validity of the test method.