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A Multiple Time-Scale Power Amplifier Behavioral Model for Linearity and Efficiency Calculations

Pedro, J. C. ; Cabral, P. M. ; Cunha, T.R. ; Lavrador, P.M.L.

IEEE Trans. on Microwave Theory and Tech. Vol. 61, Nº 1, pp. 606 - 615, January, 2013.

ISSN (print): 0018-9480
ISSN (online): 0018-9480

Journal Impact Factor: 2,711 (in 2008)

Digital Object Identifier: 10.1109/TMTT.2012.2227779

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Abstract
This work describes a new power amplifier, PA, behavioral model intended to predict both the PA amplitude and phase input-output signal relationship and the average or instantaneous dc power consumption and thus average or instantaneous signal-dependent efficiency. Hence, contrary to other previously published PA behavioral models, such a model is not only capable of describing the complex low-pass equivalent fundamental zone output, but also the real low-pass current consumption output. In addition, a special attention is paid to accurately account for the multiple time-scale dynamics shown by modern GaN HEMT based high power amplifiers.