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Miniaturized open-ended dual-band band-pass filter with series stepped capacitance and shunt meandered line inductance for microwave frequency applications

Published online by Cambridge University Press:  10 January 2019

Naveen Mishra ,
Dilip Kumar Choudhary Open the ORCID record for Dilip Kumar Choudhary [Opens in a new window]  and
Raghvendra Kumar Chaudhary Open the ORCID record for Raghvendra Kumar Chaudhary [Opens in a new window]
Naveen Mishra
Affiliation:
Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand-826004, India
Dilip Kumar Choudhary
Affiliation:
Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand-826004, India
Raghvendra Kumar Chaudhary*
Affiliation:
Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand-826004, India
*
Author for correspondence: Raghvendra Kumar Chaudhary, E-mail: raghvendra.chaudhary@gmail.com
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Abstract

In this paper, a miniaturized open-ended dual-band band-pass filter with stepped series capacitance and shunt meandered line inductance for microwave frequency applications has been designed and discussed. In order to offer ease of fabrication and uniplanar configuration, coplanar waveguide feeding arrangement has been used. Zeroth order resonance, a special phenomenon of composite right/left handed transmission line has been utilized to miniaturize the filter size. The designed filter structure offers miniaturization with overall footprint size of 0.26λg × 0.19λg, where λg is the guided wavelength at the center frequency of 1.46 GHz. It offers 58.90% (1.03–1.89 GHz) and 25.93% (2.55–3.31 GHz) measured −3 dB fractional bandwidth with respect to the center frequencies of 1.46 and 2.93 GHz, respectively. Dispersion plot has been utilized to discuss the metamaterial properties for the proposed dual-band band-pass filter. In addition to above, the proposed filter structure presents almost flat group delay curve within both passbands. The proposed filter structure can be suitably utilized for distinct wireless applications, for example global navigation satellite system (1.559–1.610 GHz), GSM1800 (1.7–1.8 GHz), Wi-MAX (2.5–2.7 GHz), and naval radar and air traffic control (2.7–2.9 GHz).

Keywords

Band-pass filtercomposite right/left handed transmission linedual-bandmetamaterialzeroth order resonance
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 3 , April 2019 , pp. 237 - 243
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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