Method for testing space electromagnetic radiation interference via planar circuit

Abstract

The invention discloses a method for testing space electromagnetic radiation interference via a planar circuit. The method comprises the steps of: (1) placing a planar test circuit in a region to be tested; (2) measuring voltage and current responses of loads of cables; (3) and calculating to obtain a space radiation field surrounding the cables by adopting a finite-difference time-domain method FDT in a cable and space radiation field coupling model according to the voltage and current responses of the loads of the cables obtained through test in the step 2. The method provided by the invention can solve the problem of large testing error caused by electromagnetic radiation interference signals in a testing space under the conditions that the testing space of a field intensity meter (a current probe) is small and the cables are dense. Through testing the voltage response of the cables, the surrounding space electromagnetic field is calculated, the application rage is expanded by adopting a multi-cable coupling model, the influence of reflected waves is effectively eliminated by using matched loads, the difficulty of testing the space electromagnetic field under the conditions of small internal space and dense cables is effectively solved, and the method is suitable for popularization and application in the fields of microwave technologies and electromagnetic compatibility.

Description

technical field [0001] The invention belongs to the field of microwave technology and electromagnetic compatibility, and in particular relates to a method for electromagnetic radiation interference in a planar circuit test space Background technique [0002] Electromagnetic compatibility technology is widely used in industry, science and medicine (IMS) research, and its application fields are expanding. Especially in the case of continuous wave, high power, and long-time working microwave sources, the leakage radiation of microwave space will have a fatal impact on the control circuit at this time. According to relevant literature analysis, cable coupling is the main way for space radiation to cause damage to circuit components. Therefore, in order to ensure the long-term effective operation of electronic products, it is necessary to test space electromagnetic radiation interference. [0003] The space electromagnetic radiation interference test mainly uses the standard ant...

AI Technical Summary

Problems solved by technology

In the process of testing with a field strength meter (current probe), the placement and fixation of the probe is a major difficulty in the test, especially in the case of narrow internal space and dense cables (in the case of most microwave sources), It is possible to place the test probes at all

Secondly, the placement of the probe will change the distribution of the radiation field, which will bring large errors to the test.

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