volume | PIER Journals

Abstract

This manuscript investigates the design and implementation of a Substrate Integrated Waveguide (SIW) bandpass filter using an inset feed as a defect and a rectangular slot defect in the ground plane. In this research, the feed line is also used as a defect by replicating the inset feed line on the ground. The inset-feed structure on both conducting layers improves filter performance and reduces size. To further enhance the filter's passband characteristics, a simple rectangular slot is introduced in the ground plane. This Defected Ground Structure (DGS) modifies the current distribution and improves the impedance bandwidth. The proposed filter operating at a center frequency of 10.5 GHz with a bandwidth of 500 MHz and offering a return loss better than 30 dB is designed, fabricated, and experimentally validated. The measured results show good agreement with simulations. The filter exhibits good performance, featuring appropriateness for single-channel satellite communication applications.

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Dr. Natesan Ramya

Dr. Boopathi Rani Rajasekar