ANN BASED OPTIMAL DESIGN OF MICROWAVE FILTER

In this work synthesis and optimization of a band-pass filter using coupled resonators elements in end coupled configuration has been realized using suspended strip-line medium. The theoretical design to compute physical dimensions of the resonator elements of the SSL BPF is done using spectral domain technique. The verifications of the frequency dependent S parameters of the overall filter are done using EM simulation. The physical dimensions of resonator elements are optimized for broad operation bandwidth of the filter using ANN-GA optimization techniques. Finally the optimized filter has been fabricated and measured to verify the design approach. It has been observed that the fabricated SSL filter has a wide pass band and significant low VSWR over the frequency band of design. The filter is made ultra wideband and manufacturing tolerances is made flexible with offset coupled strip elements which are an additional advantage of this filter.