Design of single and dual band pass filter using substrate integrated waveguide with DGS

Defected ground structure (DGS) is introduced on top side of substrate integrated waveguide (SIW) Resonator. Due to this DGS, SIW Resonator resonate two different frequencies with one Transmission zero between two pass bands. Both resonant frequencies and transmission zero can be controlled by changing the position of DGS. For filter design Rogers RT/Duroid 5880 with substrate height of 0.508mm & copper thickness of 17um has been used.