Quad Band Waveguide Bandpass Filter Using Slot Ring and Complementary Split Ring Resonators

Abstract

In this paper, a combination of slot ring and complementary split ring resonators has been proposed to achieve quad band bandpass filter response in waveguide. The resonators have been formed on a Roger RO 4350 substrate with their common centre at the middle of the substrate. Two such structures have been placed on the transverse plane of a WR–90 waveguide at a distance of 8.41 mm to achieve the dual pole quad band response. Necessary simulations have been carried out using Ansoft HFSS (version 14). Measured result shows a quad band bandpass response with centre frequencies at 8.51/9.46/10.47/12.05 GHz and 3-dB bandwidth 0.256/0.2287/0.445/0.755 GHz, respectively. Approximate equivalent circuit of the filter is also proposed. The filter is 10 mm long.

KEYWORDS:

• Bandpass filter
• Complementary split ring resonator (CSRR)
• Quad band
• Split ring resonator (SRR)
• Waveguide

ACKNOWLEDGEMENTS

The authors will like to thank the Department of Science and Technology (DST), Government of India for their instrumental support through FIST Project.

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

A. Bage

Amit Bage received his diploma in electronics from Birla Institute of Technology Mesra Ranchi, India, in 2007 and BTech in electronics and communication engineering from Punjab Technical University Jalandhar, India, in 2012. He is currently pursuing his PhD degree in the Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, India. In his area of specialization, he is interested in electromagnetics and his recent research activities have focused on waveguide filters. He is a student member of IEEE and associate member of IETE.

S. Das

Sushrut Das received BSc, MSc, MTech, and PhD degrees in 1999, 2001, 2003, and 2007, respectively. He joined Indian Institute of Technology (Indian School of Mines), Dhanbad, India, in 2007 where he is currently an assistant professor in the Department of Electronics Engineering. He has authored one book, Microwave Engineering (Oxford University Press, 2014) and published several research papers in referred International Journals. He has received URSI (International Union of Radio Science) Young Scientist Award in Istanbul, Turkey. His research interest includes microwave antennas, microwave passive structures, wireless energy transfer, and energy harvesting. Dr Das is a member of IEEE.

E-mail: [email protected]

L. Murmu

Lakhindar Murmu received his BTech degree in electronics and communication engineering from West Bengal University of Technology, India in 2009, master of engineering degree in electronics and telecommunication engineering from Bengal Engineering and Science Engineering, Shibpur, India in 2011, and PhD degree from IIT (ISM), Dhanbad, India in 2017. Presently, he is Assistant Professor in the Department of Electronics and Communication Engineering, VNR Vignana Jyothi Institute of Engineering and Technology, Hyderabad, India. His area of specialization is electromagnetics and his recent research interest is focused on the novel microstrip circuits design for RF and microwave communication.

E-mail: [email protected]