Bandpass filter (BPF) design using waveguide iris conformation over Substrate Integrated Waveguide (SIW) Bend

In this paper a novel Substrate Integrated Waveguide(SIW) filter has been proposed, bended with 150° angle and loaded with cylindrical iris for obtaining the filtering characteristic in the range of Ku band. 150°bend within the SIW structure is provided to facilitate its integration ability over planar Microwave Integrated Circuits (MICs). Several configurations of iris are analysed for obtaining the pass band near about 1 GHz (15.5GHz to 16.5GHz) with minimum insertion loss (IL<; 1.2dB). The proposed filters are designed over a material with dielectric constant of 3.2 and thickness of 0.8 mm. The effect on transmission bandwidth as well as stopband attenuation due to different iris configurations are also presented with parametric analysis.