Full-wave analysis of a wide band parallel cascaded band pass filter using the novel method of lines

In this paper, a new parallel cascaded band pass filter is presented. This filter is easier to fabricate, more compact and simpler to design than the conventional end-or parallel coupled line filters. A new eigenmode algorithm, based on the method of lines and the generalized transmission line (GTL) equations is applied to compute the scattering parameters of the filter. The analysis is developed by nonequidistant discretization to reduce the discretization window. A neural network approach is used for optimizing the scattering parameters of the band pass filter to improve its performance. The designed filter has achieved a wide band pass of %15 with 10 dB VSWR of its central frequency. The optimized filter is fabricated and its performance is measured. Good agreement is found between numerical and experimental results.