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Nonlinearity in GaAs FET power amplifying devices

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2 Author(s)
Cheng, T.C. ; Bell-Northern Research, Ottawa, Canada ; Shurmer, H.V.

Modern microwave communication systems rely heavily on the linearity of output stages incorporating GaAs FET power amplifying devices. This letter describes a system for the automatic nonlinearity measurement in such devices of gain and phase angle as functions of input power level and frequency, with results leading to significantly improved system performance.

Published in:

Electronics Letters  (Volume:20 ,  Issue: 19 )