DocumentCode
941855
Title
A Very Wide-Band Microwave MESFET Mixer Using the Distributed Mixing Principle
Author
Tang, On San A ; Aitchison, Colin S.
Volume
33
Issue
12
fYear
1985
fDate
12/1/1985 12:00:00 AM
Firstpage
1470
Lastpage
1478
Abstract
A new theory of distributed (traveling-wave) mixing is presented. A closed-form expression for the conversion gain is derived. Subsequently, the expression is reduced to a very simple form when the mixer approaches the ideal lossless case. A simplified nonlinear model of a GaAs MESFET is also described. Design criteria and considerations are presented. The relative contributions made by circuit parasitic to the conversion gain-bandwidth product are also examined. Experimental verification on a two-section design is described. It exhibits around 4 dB of conversion loss over the signal frequency band from 2 GHz to the cutoff at 10 GHz for an IF of 1.5 GHz. Experimental results obtained corroborate the theoretical predictions. Better performance is expected if more sections are employed.
Keywords
Capacitance; Closed-form solution; Diodes; Gallium arsenide; Helium; MESFET circuits; Mixers; Storage area networks; Transmission line theory; Wideband;
fLanguage
English
Journal_Title
Microwave Theory and Techniques, IEEE Transactions on
Publisher
ieee
ISSN
0018-9480
Type
jour
DOI
10.1109/TMTT.1985.1133242
Filename
1133242
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