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A dual notched band UWB-BPF based on microstrip-to-short circuited CPW transition

Published online by Cambridge University Press:  21 May 2018

Abu Nasar Ghazali Open the ORCID record for Abu Nasar Ghazali [Opens in a new window] ,
Mohd Sazid  and
Srikanta Pal
Abu Nasar Ghazali*
Affiliation:
School of Electronics, Kalinga Institute of Industrial Technology, Bhubaneswar, 751024, India
Mohd Sazid
Affiliation:
Department of Electronics and Communication Engineering, Noida Institute of Engineering and Technology, Greater Noida, 201306, India
Srikanta Pal
Affiliation:
Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, 835215, India
*
Author for correspondence: Abu Nasar Ghazali, E-mail: [email protected]
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Abstract

This paper proposes a dual notched band ultra-wideband (UWB) bandpass filter (BPF) based on hybrid transition of microstrip and coplanar waveguide (CPW). The CPW in ground plane houses a stepped impedance resonator shorted at ends, and is designed to place its resonant modes within the UWB passband. The microstrips on the top plane are placed some distance apart in a back-to-back manner. The transition of microstrip on top and shorted CPW in the ground is coupled through the dielectric in a broadside manner. The optimized design of the transition develops the basic UWB spectrum with good return/insertion loss and extended stopband. Later, defected ground structure, embedded in CPW, and split ring resonators, coupled to feeding lines are utilized to develop dual sharp passband notches. The simulated data are verified against the experimentally developed prototype. The proposed dual notched UWB-BPF structure measures only 14.6 × 7.3 mm2, thereby justifying its compactness.

Keywords

Filtersmicrostrip bandpass filterpassive components and circuits
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Special Issue 7: Electronic Warfare , September 2018 , pp. 794 - 800
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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