Abstract
Aiming at the problem that the impedance of the probe is prone to non-linear changes when applied to the bulk current injection test replacing high field intensity radiation, the linearity test of the existing commercial current probe is carried out by analyzing the method of large current injection. The test results show that as the injected power increases, the linearity error at different frequencies also increases. A plan for the development of a high-power and high-linearity current probe was proposed, and the probe was developed and passed the test. The self-developed current injection probe has a maximum withstand power of 500 W. The insertion loss varies with the injected power and has good linearity (0.3 dB @ 1−500 W). The probe can meet the technical requirements of carrying out bulk current injection (equivalent high field electromagnetic radiation effect) test.
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