Computer aided design of evanescent mode waveguide bandpass filter with non-touching E-plane fins

The authors present an efficient computer-aided-design procedure that systematically utilizes a lookup table containing the scattering parameters of E-plane fins. The algorithm incorporates the correlations between the design parameters and the filter characteristics. Using this algorithm, all the filter parameters are obtained directly from the specifications given for the center frequency and the bandwidth of the filter. The design algorithm was tested and shown to give results that are very close to experimental results.<>