Design of Substrate Integrated Waveguide Based Triple Band Pass Filter for Ku and K Band Application

In this article a design of Substrate Integrated Waveguide filter with cut-off frequency of 14 GHz has been presented. The Defective Patch Slot (DPS) and Defective Ground Slot (DGS) has been engraved in the Top and Bottom layer of SIW filter. This type of SIW structure facilitated with DGS and DPS transformed SIW high pass filter into a Triple Band pass filter with selective bands having centre frequencies of 14.33GHz, 17GHz and 22.12 GHz respectively. For the simulation of results Ansys HFSS Software has been used. The simulated results for the proposed Triple Band SIW filter show all attributes of an efficient band pass filter. The proposed Triple Filter is having a selective Band width as 0.63GHz, 1.71GHz, 1.76GHz respectively. Further, the proposed filter also shows enhanced return loss of −21.44 dB, −21.21dB and −20.37 dB and the insertion loss is not also exceeding −0.5 dB in all three bands. With all the above parameters the proposed filter is quite compact (10mm $\times$ 20 mm) in size making it more suitable for Ku and K band satellite link