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Reflectionless broad-band matching networks using a diplexer approach

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1 Author(s)
McKay, T.G. ; Harris Microwave Semiconductor, Milpitas, CA, USA

A method is presented for generating networks which match an RC load with prescribed gain equalization while simultaneously providing a good match. The technique involves the synthesis of two network conductance functions, one of which forms the input conductance of the matching circuit, and the second of which realizes the complementary conductance. When placed in parallel, the resulting network provides constant, real input impedance, and when driven from a resistive source, it provides intended gain equalization. This method has potential advantage over the classical method of balanced, reflection-equalized amplifier networks, for reduced size and lower loss, and is ideally suited for MMIC (monolithic microwave integrated circuit) application since the need for physically large couplers is eliminated. This method is preferable over the present heuristic lossy-match approaches, since it is theoretically sound and permits optimal gain-bandwidth design.<>

Published in:

Microwave Symposium Digest, 1992., IEEE MTT-S International

Date of Conference:

1-5 June 1992