Electromagnetic Interference Prediction Test Key Technology Research

This paper discusses the electromagnetic interference pre-testing techniques to improve circuit performance, electromagnetic compatibility certification and certification to make up for early indicators of the importance cf testing, feasibility. In the large-scale use of electronic devices today, the electronic system stability, security is particularly important. Effects of electromagnetic interference is an important factor in the circuit system stability, but also the paper would like to pre-tested by electromagnetic interference solution to high-efficiency low-cost solution to EMI problems.Introduces the basic principles of electromagnetic field, electromagnetic wave propagation characteristics and the basic principles of the concept of a directional antenna, then also introduces the EMI pre-tested three options:software simulation testing program, Spectrum Analyzer with near-field probe test solutions, the electromagnetic compatible scan test solution.Combination of test cases, each introduced with a spectrum analyzer with near-field scanning probe programs and programs to address electromagnetic interference in the circuit of excessive electromagnetic interference and certification issues. By classic case analysis to prove that this test program can provide simple, convenient, efficient, low-cost solution to the problem of electromagnetic interference in the circuit to achievethe pre-testing purposes, anddemonstrated the feasibility of this thesis.