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Effect of baseband impedance on FET intermodulation

Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.14/17627

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Title: Effect of baseband impedance on FET intermodulation
Related: IEEE transactions on microwave theory and techniques, Vol. 51, Issue 3, p.1045-1051
DOI: 10.1109/TMTT.2003.808704
Publisher: IEEE Institute of Electrical and Electronics
Date: 2003
Author/Creator: Brinkhoff, James
Author/Creator: Parker, Anthony Edward
Description: The intermodulation performance of an FET in the common-source configuration is dependent on the impedance presented to its gate and drain terminals, not only at fundamental, but also at harmonic and baseband frequencies. At baseband frequencies, these terminating impedances are usually determined by the bias networks, which may have varying impedance over the frequencies involved. This can give rise to asymmetry in two-tone intermodulation levels, and changing intermodulation levels with tone spacing, as previous studies have shown. In this paper, an FET is analyzed to gain an understanding, useful to the circuit designer, of the contributing mechanisms, and to enable the prediction of bias points and the design of networks that can minimize or maximize these effects. Compact formulas are given to facilitate this. An amplifier was tested, showing good agreement between the theoretical and measured results.
Description: 7 page(s)
Subject Keyword: FET amplifiers
Subject Keyword: impedance
Subject Keyword: intermodulation
Resource Type: journal article
Organisation: Macquarie University. Dept. of Electronics

Identifier: http://hdl.handle.net/1959.14/17627
Identifier: ISSN:0018-9480
Identifier: mq-rm-2003018512
Language: eng
Rights: Copyright 2003 IEEE. Reprinted from IEEE transactions on microwave theory and techniques. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Macquarie University��s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
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