Theses and Dissertations - UTB/UTPA

Date of Award


Document Type


Degree Name

Master of Science (MS)


Electrical Engineering

First Advisor

Dr. Heinrich D. Foltz

Second Advisor

Dr. Hasina F. Huq

Third Advisor

Dr. Edward J. Banatoski


This thesis will discuss subthreshold FET mixers with a focus on conversion loss derivations. To begin understanding the mixers, a look into the FET model is first taken in Chapter II. Then in Chapter III, a single FET device mixer is studied and its conversion loss is found from its small-signal model. The chapter will then include a two FET device mixer and a four device FET mixer. Finally a new type of mixer will be discussed in Chapter IV. The new type of mixer is a 3 phase mixer with the phase angles being 0°, 120°, and 240°. The theoretical conversion loss is found by treating the FETs as simple switches and a square wave as the RF signal. The resulting conversion loss is shown to be better than the previous mixers mentioned. The thesis will conclude with a discussion of future areas of work for the mixer.


Copyright 2011 Jesus Angel Torres. All Rights Reserved.

Granting Institution

University of Texas-Pan American