A wideband CPW ring power combiner with low insertion loss and high port isolation

Li, C. , Khalid, A. , Papageorgiou, V., Lok, L.B. and Cumming, D.R.S. (2012) A wideband CPW ring power combiner with low insertion loss and high port isolation. IEEE Microwave and Wireless Components Letters, 22(11), pp. 580-582. (doi: 10.1109/LMWC.2012.2224854)

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In this paper we present a coplanar waveguide (CPW)-based ring power combiner that exhibits less than 0.8 dB insertion loss, better than 15 dB port match and higher than 22 dB isolation loss over the frequency range from 50 GHz to 100 GHz. Compared with the conventional 2-way Wilkinson combiner, the proposed ring power combiner replaces the resistor between the two input ports with two quasi quarter-wave CPWs, a 180º CPW phase inverter, and two resistors that lead to frequency-insensitive port isolation and wideband port match. The power combiner is realized using an electron beam-based GaAs MMIC process along with simple electron beam airbridge technology. These results agree well with 3D full-wave simulations.

Item Type:Articles (Letter)
Additional Information:(c) 2012 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Glasgow Author(s) Enlighten ID:Li, Dr Chong and Cumming, Professor David and Lok, Dr Lai Bun and Khalid, Dr Ata-Ul-Habib
Authors: Li, C., Khalid, A., Papageorgiou, V., Lok, L.B., and Cumming, D.R.S.
Subjects:T Technology > TK Electrical engineering. Electronics Nuclear engineering
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
Research Group:Microsystem Technology
Journal Name:IEEE Microwave and Wireless Components Letters
Published Online:19 October 2012
Copyright Holders:Copyright © 2012 IEEE
First Published:First published inIEEE Microwave and Wireless Components Letters 22(11):580-582
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
497131Novel Thermal Management Concepts: High Power High Frequency Planar Gunn DiodeDavid CummingEngineering & Physical Sciences Research Council (EPSRC)EP/H011862/1ENG - ENGINEERING ELECTRONICS & NANO ENG