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Bandpass filter (BPF); defected ground structure (DGS); defected microstrip structure (DMS); substrate integrated waveguide (SIW); Ku-band.

This paper presents a design of compact SIW (substrate integrated waveguide) bandpass filter for application in Ku-band Transmit up-convert frequency (i.e., 13.7–14.1 GHz) used for satellite communications. Based on Defected Microstrip Structure-Defected Ground Structure combination (DMS-DGS), this SIW filterstructure is designed to improve passband and stopband performance. By merging circular ring slot (CRS) with interdigital DGS, better passband characteristics with sharp stopband attenuation are obtained. To validate thedesign, the filter is fabricated using Rogers substrate. The size measures 23.8 mm 9 10 mm and operates at a center frequency of 13.9 GHz. Measured results of the filter agree well with the simulated results. Also, designed BPF filter has advantage of low insertion loss, better return loss, compact size and high stopband rejection

BANU PRIYA ANNADURAI¹ UMMA HABIBA HYDER ALI

1. Department of Electronics and Communication Engineering, Sri Venkateswara College of Engineering, Anna University, Sriperumbudur 602117, India

Published

25 September 2020

Manuscript received

20 January 2020

Manuscript revised

20 July 2020

Accepted

16 August 2020