Design of substrate integrated waveguide fifth order band pass filter

This paper presents the design and the comparison between an X-band waveguide band-pass filter with irises (WG) and it equivalent in substrate integrated waveguide technology (SIW). The filters are designed for the pass band from 10 GHz to 11.4 GHz and realized by using symmetrical inductive irises. Good agreement between the simulation results of S-parameters for the proposed SIW filters. The bandwidth of the SIW filter is about 13% the return loss is about 40dB at 11.2 GHz which characterized by good selective performances.