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Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/73490

Type: Conference paper
Title: Effect of polyimide layers on the permittivity tuning range of liquid crystals
Author: Yaghmaee, Pouria
Kaufmann, Thomas
Bates, Bevan Douglas
Fumeaux, Christophe
Citation: Proceedings of the 6th European Conference on Antennas and Propagation, held in Prague on 26-30 March, 2012, pp.3579-3582
Publisher: IEEE
Issue Date: 2012
ISBN: 9781457709197
Cover art
9781457709180
Conference Name: European Conference on Antennas and Propagation (6th : 2012 : Prague)
EUCAP 2012
School/Discipline: School of Electrical and Electronic Engineering
Statement of
Responsibility: 
Pouria Yaghmaee, Thomas Kaufmann, Bevan Bates and Christophe Fumeaux
Abstract: Liquid crystals have potential applications in the design of tunable microwave devices. Polyimide films are commonly incorporated in designs to achieve reproducible molecule alignment in the unbiased state. In this investigation two separate resonator elements are designed and investigated: One is fabricated with polyimide layers and one without. Experimental results obtained with a patch resonator illustrate that about half of the maximum tuning range is achieved without polyimide layers. Since substrates able to sustain a temperature range of 180-300 °C are required for the polyimide film curing process, avoiding polyimide enables using even lower heat resistant substrates for various tunable microwave applications and can lead to faster fabrication processes.
Keywords: Component; tunable devices; liquid crystal (LC); polyimide film; tunable resonator
Rights: © 2012 IEEE
RMID: 0020121682
DOI: 10.1109/EuCAP.2012.6205944
Appears in Collections:Electrical and Electronic Engineering Publications
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