Research on the Induced Current Distribution Law of the Penetrative Conductor under the Condition of the Continuous Wave Radiation

The penetrative conductor is the most important coupling channel of bring the outside electromagnetic radiated field into the metal shielded box. In order to disclose the electromagnetic radiation coupling law of the penetrative conductor and the generation mechanism of the local electromagnetic field enhancement effect in shielded box caused by the penetrative conductor coupling, the induced current distribution law of the penetrative conductor under the condition of sine continuous wave radiation is studied in this paper. The penetrative conductor induced current distribution computation model is established under the condition of plane wave radiation. The analytic expression of the induced current distribution is derived. The penetrative conductor induced current amplitude distribution curve is plotted by using Matlab software at typical frequency point. The penetrative conductor induced current distribution law versus radiated frequency and conductor location is disclosed under the condition of plane wave radiation. The penetrative conductor induced current test platform based on vector network analyzer is developed by adopting current probe and optical fiber signal transmission system. The normalized induced current distribution curve at typical frequency point is measured. The test results verify the correctness of the penetrative conductor induced current distribution law and other theoretical analysis results.