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Multistage solid‐state power amplifier design by a new alternative synthesis technique
Author(s) -
Hazouard M.,
Kerhervé E.,
Jarry P.
Publication year - 2004
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.20000
Subject(s) - amplifier , electronic engineering , transistor , rf power amplifier , computer science , power (physics) , nonlinear system , matching (statistics) , electrical engineering , engineering , mathematics , physics , voltage , statistics , cmos , quantum mechanics
For the first time, the numerical real‐frequency technique has been applied to the design of a nonlinear power amplifier. This synthesis technique does not require any transistor model by directly using measured large‐signal S ‐parameters of the power transistor device. The double power‐frequency dependence of these S ‐parameters requires the use of a bidimensional interpolation (spline functions). With the Levenberg–Marquardt optimization and large‐signal S ‐parameters, a specific CAD program optimizes the added‐power in order to synthesize the matching networks of the PA. The simulated and measured results of two S‐band power amplifiers validate the new synthesis approach. © 2004 Wiley Periodicals, Inc. Int J RF and Microwave CAE 14, 87–98, 2004.