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Title: Frequency reconfigurable RF circuits using photoconducting switches
Authors: Draskovic, D.
Panagamuwa, C.J.
Vardaxoglou, J.C.
Budimir, D.
Keywords: Frequency switchable
Branch-line coupler
Power amplifier
Silicon switch
Issue Date: 2010
Publisher: © Wiley Periodicals, Inc.
Citation: DRASKOVIC, D. ... et al, 2010. Frequency reconfigurable RF circuits using photoconducting switches. International Journal of RF and Microwave Computer-Aided Engineering, 20 (1), pp.15-21.
Abstract: Designs for a frequency switchable dual-band branch-line coupler and a reconfigurable S-band power amplifier input matching network with photoconducting switches are presented. Frequency switching is achieved by increasing the power of the laser applied to the highly resistive silicon wafer and changing the properties of silicon under optical illumination. The advantages of this approach are high-speed switching, electromagnetic transparency (no interference) and thermal and electrical isolation between the device and the control circuit. A branch-line coupler frequency shift of 35% and 10% has been achieved from all switches off to all switches on in lower (900 MHz) and upper (1800 MHz) frequency bands, respectively. Frequency switchable class AB power amplifier with silicon switch in the input matching circuit has obtained the frequency tuning range of 2.5-3.5 GHz with no significant loss in efficiency and linearity.
Description: This is the pre-peer reviewed version of an article published in the journal, International Journal of RF and Microwave Computer-Aided Engineering [© Wiley Periodicals, Inc.]. The definitive version is available at: dx.doi.org/10.1002/mmce.20415
Version: Submitted for publication
DOI: 10.1002/mmce.20415
URI: https://dspace.lboro.ac.uk/2134/5808
Publisher Link: http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-047X
ISSN: 1096-4290
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

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