Design and simulation of multilayer bandpass filter for C band application / Siti Rohana Abd Seman

In this paper, a multilayer bandpass filters for C-band application has been proposed. The filter designed has a four pole interdigital resonators which was arranged in two layers separating each other. The operating frequency of multilayer bandpass filters are set to5.85 GHz which is in range of C-band application and the fractional bandwidth is 37%.Based on the design, the size of filter is reduced and the result will better for Insertion loss S21 and Return loss SI 1. The performance of the multilayer bandpass filter was evaluated by using CST software and the simulation result of return loss Sll and insertion loss S21 would be present in a form of graph. Some parameters of the multilayer interdigital bandpass filter also was studied based on feeder width adjusted, feeder position adjusted and ground dimension adjusted. The results were compared in terms of return loss Sn and insertion loss S21.