Abstract
Radiation effect test cannot be performed in large-scale space simulations of a strong field electromagnetic environment, and existing BCI (bulk current injection) technology employed for nonlinear system tests is subjected to its limitation. Given this, the present study analyzes the equivalent radiation test method of BCI in the parallel double-line coupling channel. To be specific, the response analysis models of the EUT (equipment under test) under the radiation condition and the injection condition are developed with the nonlinear response system as the EUT. In addition, the corresponding equivalent relationship is derived between the voltage of the injection excitation source and the radiation field intensity. Subsequently, the condition and the test method to substitute BCI for radiation are proposed and experimentally verified. As revealed from the research results, specific to nonlinear response systems, the BCI method proposed here can be accurately equated with the radiation effect test of the EUT. It is noteworthy that the maximum test error only reaches 3.62 dB, capable of satisfying the actual requirements of the project.
Highlights
With the application of high-power frequency equipment and EMP (Electromagnetic Pulse) weapons, the battlefield electromagnetic environment turns out to be more complicated
If the corresponding relationship is associated with the impedance of the equipment under test (EUT), the corresponding relationship should be re-established in the high field intensity extrapolation test
It is found that the relationship between the injection source and the radiation field intensity is not associated with the impedance of the EUT
Summary
With the application of high-power frequency equipment and EMP (Electromagnetic Pulse) weapons, the battlefield electromagnetic environment turns out to be more complicated. In MIL-STD-464C, shipboard operations and ordnance will be subjected to an average electric field intensity of 270 V/m under the frequency range of 150–225 MHz.[1] For peak field intensity, it can even reach 3120 V/m Such a high-intensity electromagnetic environment is difficult to substitute in large-scale spaces.[2,3,4] In most cases, the desired results cannot be achieved even if consuming a lot of human and material resources. To address the mentioned problems, the corresponding relationship is developed between the injection voltage and the radiation field based on the equivalent response of the input ports of the EUT. A test method of linear extrapolation of injection excitation source is developed to solve the difficulty in injection substituting radiation test equivalently in the parallel double-line coupling channel for the nonlinear response system. Even if the EUT is the non-linear system, the test method is applicable
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