volume | PIER Journals

Abstract

A Dual-band Half Mode Substrate Integrated Waveguide (HMSIW) filter at 4.88 and 6.42 GHz are shown. Defective Microstrip Structure converts the HMSIW's high-pass response to bandpass. Circular Complementary Split Ring Resonator splits the wide passband to give the filter dual characteristics. The out-of-band properties are improved by using a DS-OCSRR-shaped Defected Ground Structure (DGS). PCB technology is used to build and test the filter using an RT Duroid 5880 substrate with 1.6 mm thickness. The measured and simulated values match. Good skirt selectivity, insertion loss of 1.5/1.42 dB, fractional bandwidths of 9.42% and 6.7%, and return loss profile of 21 dB in both passbands characterise the thin dual-band filter. The filter is small, measuring 0.86λ_g × 0.37λ_g at 4.88 GHz.

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Dr. Soundarya Gopalakrishnan

Mr. Sam Suresh Jayabalan

Dr. Chinnaswamy Sivamani

Dr. Doraiswamy Vedha Vinodha

Dr. Maheleeswaran Pushpavalli

Dr. Ganesan Vijayakumari

Dr. Athappan Senthilkumar