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Four-watt 20-GHz partial monolithic amplifier

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6 Author(s)
Yarborough, R. ; Texas Instrum. Inc., Dallas, TX, USA ; Saunier, P. ; Tserng, H.Q. ; Salzman, K.
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A 4-W power amplifier with 28% power-added efficiency at 20 GHz has been demonstrated using 0.25- mu m heterostructure FET (HFET) device technology. This two-stage amplifier features a mostly monolithic approach with a portion of the input and output matching networks on alumina. The output matching network employs reactive matching elements on GaAs, followed by a Chebyshev coupled-line transformer/combiner on alumina to achieve a low-impedance match with minimal loss. Discrete 0.25- mu m HFET device results at 18 GHz and 20 GHz as well as amplifier design and performance over a >3 GHz band are presented.<>

Published in:

Microwave Symposium Digest, 1993., IEEE MTT-S International

Date of Conference:

14-18 June 1993

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