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A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator

This paper presents a novel synthesis of a quasi-Chebyshev Nth order stub-loaded coupled-line ultra-wideband bandpass filter. A unit element of a proposed filter topology consists of two short-circuited stubs loaded at the edges of coupled lines. A distributed equivalent circuit model of a proposed...

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Autores principales: Abdul Rehman, Muhammad, Khalid, Sohail, Mushtaq, Bilal, Uddin, Mueen, Iqbal, Jawaid, Abdelhaq, Maha, Alsaqour, Raed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10609298/
https://www.ncbi.nlm.nih.gov/pubmed/37893311
http://dx.doi.org/10.3390/mi14101874
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author Abdul Rehman, Muhammad
Khalid, Sohail
Mushtaq, Bilal
Uddin, Mueen
Iqbal, Jawaid
Abdelhaq, Maha
Alsaqour, Raed
author_facet Abdul Rehman, Muhammad
Khalid, Sohail
Mushtaq, Bilal
Uddin, Mueen
Iqbal, Jawaid
Abdelhaq, Maha
Alsaqour, Raed
author_sort Abdul Rehman, Muhammad
collection PubMed
description This paper presents a novel synthesis of a quasi-Chebyshev Nth order stub-loaded coupled-line ultra-wideband bandpass filter. A unit element of a proposed filter topology consists of two short-circuited stubs loaded at the edges of coupled lines. A distributed equivalent circuit model of a proposed topology is extracted and used to acquire a generalized filtering function. The extracted filtering function is of rational form. The denominator of the filtering function causes a mismatch with Chebyshev type-I polynomials. For conventional narrowband filters, the denominator term can be neglected because of the close vicinity of band-edge frequencies; however, for the ultra-wideband filter response, the factor in the denominator cannot be neglected and hence requires a new mathematical procedure to compensate for the effect of the frequency-dependent term in the denominator. The electrical parameters are calculated using the proposed synthesis and used to design an ideal filter topology on ADS. To validate the proposed design procedure, fabrication is performed on a high-frequency substrate. The proposed filter is miniaturized in size and has good out-of-band performance. The simulated and measured results provide good agreement.
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spelling pubmed-106092982023-10-28 A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator Abdul Rehman, Muhammad Khalid, Sohail Mushtaq, Bilal Uddin, Mueen Iqbal, Jawaid Abdelhaq, Maha Alsaqour, Raed Micromachines (Basel) Article This paper presents a novel synthesis of a quasi-Chebyshev Nth order stub-loaded coupled-line ultra-wideband bandpass filter. A unit element of a proposed filter topology consists of two short-circuited stubs loaded at the edges of coupled lines. A distributed equivalent circuit model of a proposed topology is extracted and used to acquire a generalized filtering function. The extracted filtering function is of rational form. The denominator of the filtering function causes a mismatch with Chebyshev type-I polynomials. For conventional narrowband filters, the denominator term can be neglected because of the close vicinity of band-edge frequencies; however, for the ultra-wideband filter response, the factor in the denominator cannot be neglected and hence requires a new mathematical procedure to compensate for the effect of the frequency-dependent term in the denominator. The electrical parameters are calculated using the proposed synthesis and used to design an ideal filter topology on ADS. To validate the proposed design procedure, fabrication is performed on a high-frequency substrate. The proposed filter is miniaturized in size and has good out-of-band performance. The simulated and measured results provide good agreement. MDPI 2023-09-29 /pmc/articles/PMC10609298/ /pubmed/37893311 http://dx.doi.org/10.3390/mi14101874 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Abdul Rehman, Muhammad
Khalid, Sohail
Mushtaq, Bilal
Uddin, Mueen
Iqbal, Jawaid
Abdelhaq, Maha
Alsaqour, Raed
A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title_full A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title_fullStr A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title_full_unstemmed A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title_short A Novel Synthesis of Quasi-Chebyshev Ultra-Wideband Bandpass Filter Using Nth Order Stub Loaded Coupled-Line Resonator
title_sort novel synthesis of quasi-chebyshev ultra-wideband bandpass filter using nth order stub loaded coupled-line resonator
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10609298/
https://www.ncbi.nlm.nih.gov/pubmed/37893311
http://dx.doi.org/10.3390/mi14101874
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