NDLI: Optimum-setting and calibration procedures for heterodyne measurements of amplitude and phase noise in high-frequency amplifiers

Content Provider	IEEE Xplore Digital Library
Author	Jauregui, R. Portilla, J.
Copyright Year	1963
Abstract	An overview of several calibration stages has been studied and developed to obtain an optimum setting for phase and amplitude noise measurements through heterodyne techniques, which allows to measure white and flicker noise from amplifiers in the presence of a carrier signal. A technique to obtain a reliable calibration of phase and gain conversion of the measuring blocks is also presented, where the calibration of conversion factors and null conditions, using amplitude and phase modulators for each, phase and amplitude noise levels, have been fully characterized to suppress uncertainties in the measuring process. Furthermore, we introduce a procedure to measure noise of amplifiers in the presence of carrier signal based on a reference noise source and a known lossy line, which allows to determine the noise delivered from the source generator, and the contribution of the setup required for the measurement. We have found a good correlation of the measurements in small signal in comparison with the Y-factor. White noise of matched passive components was measured with the technique presented, obtaining an error of ±0.15 dB. Measurements of an SiGe-HBT amplifier designed for low phase noise are also reported. The technique has also been applied for flicker noise measurements.
Sponsorship	IEEE Microwave Theory and Techniques Society
Starting Page	1239
Ending Page	1248
Page Count	10
File Size	2388995
File Format	PDF
ISSN	00189480
Volume Number	62
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Noise Noise measurement Mixers Phase measurement Power measurement Calibration Gain measurement power amplifier Amplitude noise noise figure (NF) phase noise
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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