NDLI: Design of multi-standard single/tri/quint-wideband asymmetric stepped-impedance resonator filters with adjustable TZs

Content Provider	IET Digital Library
Author	Yasir, Yasir I. A. Al Tu, Yuxiang Bakr, Mustafa S. Parchin, Naser Ojaroudi Asharaa, Abdalfettah S. Mshwat, Widad A. Alhameed, Raed A. Abd Noras, James M.
Abstract	This study presents an original asymmetric stepped-impedance resonator filter combined with meander coupled-line structures and enabling the realisation of finite transmission zeros (TZs) and the implementation of multi-band bandpass filters. The meander coupled sections (MCSs) tune the TZs and resonant frequencies: with higher-order spurious frequencies cancelled by the TZs, a single wideband with wide stopband from 1.18 to 1.84 GHz is possible. Furthermore, by positioning the finite TZs between the high-order spurious frequencies and adjusting the coupling strength between resonators, a quint-wideband filter can be realised, with centre frequencies of 1.19, 4.29, 5.43, 6.97, 9.9 GHz and fractional bandwidths of 31.9, 15.4, 15.8, 4.3, 39.2%, respectively. More importantly, two filters with single/quad-wideband performance can be realised by tuning the parameters of the MCS, and therefore they can be designed separately by using only one original structure. The triple-wideband filter is realised with the help of the asymmetric parallel uncoupled microstrip section. These filter structures enjoy the advantage of single/multi-band versatility, structure reusability and simplicity. The good in-band and out-of-band performance, low loss and simple structure of the proposed single/tri/quint-wideband filters make them very promising for applications in future multi-standard wireless communication.
Starting Page	1637
Ending Page	1645
Page Count	9
ISSN	17518725
Volume Number	13
e-ISSN	17518733
Issue Number	Issue 10, Aug (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/13/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2018.5863
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2019-05-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Asymmetric Parallel Uncoupled Microstrip Section Band-pass Filter Coupling Strength Finite Transmission Zeros Frequency 1.18 GHz to 1.84 GHz Frequency 4.29 GHz Frequency 5.43 GHz Frequency 6.97 GHz Frequency 9.9 GHz High-order Spurious Frequency Higher-order Spurious Frequency Meander Coupled-line Structure Microstrip Filter Microwave Filter Multiband Bandpass Filter Multiband Versatility Passive Filter Passive Network Poles And Zeros Quad-wideband Performance Quint-wideband Filter Resonance Frequency Resonator Filter Single-wideband Filter Stepped-impedance Resonator Filter Tri-wideband Filter Triple-wideband Filter UHF Filter Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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