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 0018-9480Full text available as:
Available under licence : See the attached licence file.
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.
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|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|