ABSTRACT
There are several excellent programs that can be used to both define and verify filter values as follows: frequency magnitude loss at any frequency, the proper frequency magnitude slope, and the possible phase shifts over the band of interest. The electromagnetic interference (EMI) filter designer needs simple and effective methods of reaching the component values necessary for a baseline design. Thereafter, with an element of defensive design, and adjustment of the filter network during test, the electromagnetic compatibility test should prove to be successful. Some engineers use these programs to reverse engineer a filter by changing the component values until the goal of dB loss at a particular frequency is reached. The chapter reviews the chain matrix to take advantage of simulation tool to calculate the insertion loss. These can be chained to form filter modules such as T, π, L, and other filter elements along with their multiples.
