Improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping

Torrecilla, Javier and Urruchi del Pozo, Virginia and Sánchez Pena, José Manuel and Bennis, Noureddine and García Lamperez, Alejandro and Segovia Vargas, Daniel (2014). Improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping. "Materials", v. 7 (n. 6); pp. 4524-4535. ISSN 1996-1944. https://doi.org/10.3390/ma7064524.

Description

Title: Improving the pass-band return loss in liquid crystal dual-mode bandpass filters by microstrip patch reshaping
Author/s:
  • Torrecilla, Javier
  • Urruchi del Pozo, Virginia
  • Sánchez Pena, José Manuel
  • Bennis, Noureddine
  • García Lamperez, Alejandro
  • Segovia Vargas, Daniel
Item Type: Article
Título de Revista/Publicación: Materials
Date: June 2014
ISSN: 1996-1944
Volume: 7
Subjects:
Freetext Keywords: Liquid crystals; tunable devices; dual-mode filters; inverted-microstrip structure; microwave frequencies
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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 Vrms to 15 Vrms is applied to the device.

Funding Projects

TypeCodeAcronymLeaderTitle
Madrid Regional GovernmentS2009/ESP-1781UnspecifiedUnspecifiedUnspecified

More information

Item ID: 37454
DC Identifier: http://oa.upm.es/37454/
OAI Identifier: oai:oa.upm.es:37454
DOI: 10.3390/ma7064524
Official URL: http://www.mdpi.com/1996-1944/7/6/4524
Deposited by: Memoria Investigacion
Deposited on: 05 Oct 2015 17:44
Last Modified: 05 Oct 2015 17:44
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