Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping

In this paper, the design and experimental characterization of a tunable microstrip bandpass filter based on liquid crystal technology are presented. A reshaped microstrip dual-mode filter structure has been used in order to improve the device performance. Specifically, the aim is to increase the pa...

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Detalles Bibliográficos
Autores principales: Torrecilla, Javier, Urruchi, Virginia, Sánchez-Pena, José Manuel, Bennis, Noureddine, García, Alejandro, Segovia, Daniel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2014
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455930/
https://www.ncbi.nlm.nih.gov/pubmed/28788690
http://dx.doi.org/10.3390/ma7064524
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author Torrecilla, Javier
Urruchi, Virginia
Sánchez-Pena, José Manuel
Bennis, Noureddine
García, Alejandro
Segovia, Daniel
author_facet Torrecilla, Javier
Urruchi, Virginia
Sánchez-Pena, José Manuel
Bennis, Noureddine
García, Alejandro
Segovia, Daniel
author_sort Torrecilla, Javier
collection PubMed
description In this paper, the design and experimental characterization of a tunable microstrip bandpass filter based on liquid crystal technology are presented. A reshaped microstrip dual-mode filter structure has been used in order to improve the device performance. Specifically, the aim is to increase the pass-band return loss of the filter by narrowing the filter bandwidth. Simulations confirm the improvement of using this new structure, achieving a pass-band return loss increase of 1.5 dB at least. Because of the anisotropic properties of LC molecules, a filter central frequency shift from 4.688 GHz to 5.045 GHz, which means a relative tuning range of 7.3%, is measured when an external AC voltage from 0 V(rms) to 15 V(rms) is applied to the device.
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spelling pubmed-54559302017-07-28 Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping Torrecilla, Javier Urruchi, Virginia Sánchez-Pena, José Manuel Bennis, Noureddine García, Alejandro Segovia, Daniel Materials (Basel) Article In this paper, the design and experimental characterization of a tunable microstrip bandpass filter based on liquid crystal technology are presented. A reshaped microstrip dual-mode filter structure has been used in order to improve the device performance. Specifically, the aim is to increase the pass-band return loss of the filter by narrowing the filter bandwidth. Simulations confirm the improvement of using this new structure, achieving a pass-band return loss increase of 1.5 dB at least. Because of the anisotropic properties of LC molecules, a filter central frequency shift from 4.688 GHz to 5.045 GHz, which means a relative tuning range of 7.3%, is measured when an external AC voltage from 0 V(rms) to 15 V(rms) is applied to the device. MDPI 2014-06-13 /pmc/articles/PMC5455930/ /pubmed/28788690 http://dx.doi.org/10.3390/ma7064524 Text en © 2014 by the authors. licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Torrecilla, Javier
Urruchi, Virginia
Sánchez-Pena, José Manuel
Bennis, Noureddine
García, Alejandro
Segovia, Daniel
Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title_full Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title_fullStr Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title_full_unstemmed Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title_short Improving the Pass-Band Return Loss in Liquid Crystal Dual-Mode Bandpass Filters by Microstrip Patch Reshaping
title_sort improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5455930/
https://www.ncbi.nlm.nih.gov/pubmed/28788690
http://dx.doi.org/10.3390/ma7064524
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