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A filter synthesis technique applied to the design of multistage broad-band microwave amplifiers

Rooney, J.P., Parry, R., Hunter, I. and Pollard, R.D. (2002) A filter synthesis technique applied to the design of multistage broad-band microwave amplifiers. IEEE Transactions on Microwave Theory and Techniques, 50 (12). pp. 2947-2953. ISSN 0018-9480

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A method for designing multistage broad-band amplifiers based upon well-known filter synthesis techniques is presented. Common all-pole low-pass approximations are used to synthesize prototype amplifier circuits that may be scaled in frequency and impedance. All-pass filters introduced at the first stage are shown to improve input match while maintaining circuit performance less 6 dB gain. A theoretical comparison is made with the distributed amplifier and the cascaded single-stage distributed amplifier. Theoretically, a larger gain-bandwidth product is achieved using the synthesis technique. A proof-of-concept Butterworth low-pass two-stage amplifier was designed, simulated, and measured and achieved a flat gain performance of 1–4 GHz with a power gain of 14.5±1 dB close to the predicted 1–4.2 GHz, 15±1 dB.

Item Type: Article
Copyright, Publisher and Additional Information: Copyright © 2002 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: active filters, all-pass circuits, broad-band amplifiers, Butterworth filters, microwave circuits, microwave FET amplifiers
Institution: The University of Leeds
Academic Units: The University of Leeds > Faculty of Engineering (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Institute of Microwaves and Photonics (Leeds)
Depositing User: Sherpa Assistant
Date Deposited: 10 Oct 2005
Last Modified: 05 Jun 2014 01:24
Published Version: http://dx.doi.org/10.1109/TMTT.2002.805156
Status: Published
Refereed: Yes
Identification Number: 10.1109/TMTT.2002.805156
URI: http://eprints.whiterose.ac.uk/id/eprint/726

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