1EMI Filters
1.1 Introduction
Conceptually, an electrical filter network will filter out lower or higher frequency bands while passing specific bands of frequencies. The basic property of an EMI filter is usually described by the insertion-loss characteristic. That characteristic is typically frequency dependent, and it refers to the attenuation of the EMI filter. The measurement of insertion loss is complicated by several aspects. The configuration of the input and output terminals of an EMI filter is changed through different types of measurement setups, and this fact alone complicates the measurement itself.
Another problem is represented by nondefined impedance terminations at the input and output sides of the filter. The impedance of the ...
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