URSI 2011, XXVI Simposium Nacional de la Unión Científica Internacional de Radio, Leganés
This paper is the result of our research on the smallsignal
behavior of a GaAs device, in the overall I-V plane. A
complete small-signal model for a MESFET is determined from
experimental scattering parameter, measurements. All
algorithms for mathematical extraction of the microwave
equivalent circuit are implemented in an application called
WinModFet developed for research and educational purposes.
The software has been made under friendly user philosophy and
is self-explicative. The able to save and recall standard ASCII
measured data files, coupled with the graphical and
mathematical capacities of MATLAB makes this software an
interesting tool easy to use by users at any level. A modification
of traditional methods is also presented here, by means of a
weighted grid function using the values of scattering files that
surrounds the working bias point.
