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Design and analysis of a planar UWB bandpass filter with stopband characteristics using MMR technique

Published online by Cambridge University Press:  26 January 2021

Gaurav Saxena ,
Priyanka Jain  and
Y. K. Awasthi Open the ORCID record for Y. K. Awasthi [Opens in a new window]
Gaurav Saxena
Affiliation:
Department of Electronics & Communication Engineering, Galgotia College of Engineering & Technology, Greater Noida, UP201306, India Department of Electronics & Communication Engineering, Delhi Technological University, Delhi110042, India
Priyanka Jain
Affiliation:
Department of Electronics & Communication Engineering, Delhi Technological University, Delhi110042, India
Y. K. Awasthi*
Affiliation:
Department of Electronics & Communication Engineering, Manav Rachna International Institute of Research and Studies, Faridabad, HR121004, India
*
Author for correspondence: Y. K. Awasthi, E-mail: yash_ips79@rediffmail.com
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Abstract

In this paper, a ultra-wideband (UWB) bandpass filter with stopband characteristics is presented using a multi-mode resonator (MMR) technique. An MMR is formed by loading three dumbbell-shaped (Mickey and circular) shunt stubs placed in the center and two symmetrical locations from ports, respectively. Three circular and arrowhead defected ground structures on the ground plane are introduced to achieve UWB bandwidth with a better roll-off rate. The proposed filter exhibits stopband characteristics from 10.8 to 20 GHz with a 0.4 dB return loss. The group delay and roll-off rate of the designed filter are <0.30 ns in the passband and 16 dB/GHz at lower and higher cut-off frequencies, respectively. The dimension of the filter is 0.74λg × 0.67λg mm2 and was fabricated on a cost-effective substrate. All simulated results are verified through the experimental results.

Keywords

Band-pass/band-stop filter (BPF/BSF)circular/Mickey-shaped stubsdefected ground structure (DGS)multi-mode resonators (MMRs)transmitter/receiver systemultra-wideband (UWB)
Type
Filters
Information
International Journal of Microwave and Wireless Technologies , Volume 13 , Issue 10 , December 2021 , pp. 999 - 1006
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press in association with the European Microwave Association

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