Design and Characterization of Angular Bend Substrate Integrated Waveguide (SIW) Bandpass Filter for Microwave Ku-Band Applications

Substrate Integrated Waveguide (SIW) transmission line section is modified by using I shaped electromagnetic bandgap structure (EBG) slots to obtain bandpass filter characteristic in this paper. Waveguide bend of 150degrees is provided in view of increased flexibility in designing multi-element compact microwave integrated circuits (MICs). Several parameters of the waveguide bend as well as the I slots are analyzed and presented with detailed outcome. The experiments are carried out over a Neltec NH9320 material of thickness 0.8mm and dielectric constant of 3.2.