Title page for ETD etd-7497-162858

Type of Document Master's Thesis
Author Lau, Mark C.
Author's Email Address mcl4c@virginia.edu
URN etd-7497-162858
Title Small Signal Equivalent Circuit Extraction From A Gallium Arsenide MESFET Device
Degree Master of Science
Department Electrical Engineering
Advisory Committee
Advisor Name Title
Bahl, I. J.
Besieris, Ioannis M.
Elshabini-Riad, Aicha A. Committee Chair
  • Gallium Arsenide
  • Small Signal
  • Modeling
  • Simplex Method
Date of Defense 1997-07-23
Availability unrestricted
The development of microwave Gallium Arsenide Metal Semiconductor Field

Effect Transistor (MESFET) devices has enabled the miniaturization of pagers, cellular

phones, and other electronic devices. With these MESFET devices comes the need to

model them. This thesis extracts a small signal equivalent circuit model from a Gallium

Arsenide MESFET device. The approach taken in this thesis is to use measured S-

parameters to extract a small signal equivalent circuit model by optimization. Small signal

models and S-parameters are explained. The Simplex Method is used to optimize the

small signal equivalent circuit model. A thorough analysis of the strengths and

weaknesses of the Simplex method is performed.

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