NDLI: Increasing low-frequency stability margins in microwave amplifiers from experimental data

Content Provider	IEEE Xplore Digital Library
Author	Otegi, Nerea Anakabe, Aitziber Pelaz, Joana Collantes, Juan-Mari Soubercaze-Pun, Geoffroy
Copyright Year	2012
Description	Author affiliation: Dpto. Electricidad y Electrónica, University of the Basque Country (UPV/EHU), Bilbao 48080, Spain (Otegi, Nerea; Anakabe, Aitziber; Pelaz, Joana; Collantes, Juan-Mari) \|\| Centre National d'Etudes Spatiales (CNES), Toulouse Space Centre, 31401, France (Soubercaze-Pun, Geoffroy)
Abstract	A key aspect in the robust design of microwave amplifiers is to ensure circuit stability beyond the nominal operating conditions. In this work, a method for measuring and controlling the stability margin of low-frequency resonances in microwave amplifiers is proposed. The approach adds an extra RF port in series with an R-C stabilization network that is connected to the amplifier bias path. The extra RF port is used to experimentally obtain the critical poles of the circuit. Then, from the obtained pole-zero map, pole-placement techniques are applied to get the R-C values that increase the stability margin of the critical resonances. In this way, the risk of running into a low frequency oscillation when amplifier conditions are varied can be significantly reduced. The complete approach is experimentally validated in a demonstrator prototype built in printed circuit board technology.
Starting Page	1
Ending Page	3
File Size	717312
Page Count	3
File Format	PDF
ISBN	9781467310857
ISSN	0149645X
e-ISBN	9781467310888
e-ISBN	9781467310864
DOI	10.1109/MWSYM.2012.6259587
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-06-17
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Circuit stability Stability analysis Microwave amplifiers Microwave circuits Oscillators Frequency measurement stabilization networks identification measurement poles and zeros
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering Radiation

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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