NDLI: A novel computerized multiharmonic active load-pull system for the optimization of high efficiency operating classes in power transistors

Content Provider	IEEE Xplore Digital Library
Author	Blache, F. Nebus, J.M. Bouysse, P. Villotte, J.P.
Copyright Year	1995
Description	Author affiliation: IRCOM, Limoges Univ., France (Blache, F.; Nebus, J.M.; Bouysse, P.; Villotte, J.P.)
Abstract	A fully automated multiharmonic load-pull system allowing accurate measurement and control of the first three harmonic load terminations of RF and microwave transistors is presented in this paper. The technical originality of the proposed system lies in that the first, second and third harmonic load terminations can be independently and automatically monitored and fixed while varying the input power driving the transistor at the fundamental frequency. Appropriate hardware and software allow fast and automatic plots of power/efficiency performances of DUTs versus input power for different harmonic loadings. To demonstrate an attractive application of the system, measurements of a 1800 /spl mu/m gate periphery MESFET at 1.8 GHz for mobile communication applications are presented. Both suitable harmonic load terminations and nonappropriate ones yielding respectively optimum and poor power added efficiency are given.
Starting Page	1037
Ending Page	1040
File Size	335301
Page Count	4
File Format	PDF
ISBN	0780325818
ISSN	0149645X
DOI	10.1109/MWSYM.1995.406149
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-05-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Power system harmonics Microwave transistors Application software Microwave measurements Automatic control Control systems Radio frequency Computerized monitoring Hardware Software performance
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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