NDLI: Development of Ultra Low Phase Noise X-Band Oscillators

Content Provider	IEEE Xplore Digital Library
Author	Boudot, R. Gribaldo, S. Gruson, Y. Bazin, N. Rubiola, E. Llopis, O. Giordano, V.
Copyright Year	2006
Description	Author affiliation: Dpt. LPMO, UMR CNRS - Univ. de Franche-Comte, Besancon (Boudot, R.)
Abstract	This paper reports on the design and the measurement of low phase noise X-band oscillators combining a room temperature high-Q whispering gallery mode (WGM) sapphire resonator and an ultra-low phase noise sustaining amplifier. The resonator thermal configuration has been optimized leading to a thermal frequency sensitivity of -0.05 ppm/K. Compact microstrip DBR (dual behavior resonators) filters have been realized to suppress cavity spurious modes. High performance commercially available amplifiers have been tested. Owing to the low phase noise, the measurement of oscillators requires cross-correlation and some unusual solutions. X-band oscillators typical phase noise as low as -36 $dB.rad^{2}/Hz$ at 1 Hz Fourier frequency, -145 dB.rad $^{2}/Hz$ at 10 kHz offset and -160 $dB.rad^{2}/Hz$ at 100 kHz from the carrier have been measured. Parallely, two excellent and original double stage amplifiers based on a Si-SiGe transistors cascade (power gain=8.2 dB - phase noise performances : -168 $dB.rad^{2}/Hz$ at 100kHz offset) have been designed, precisely modeled (non-linear and noise modeling) and optimized thanks to dedicated CAD techniques
Starting Page	861
Ending Page	868
File Size	666687
Page Count	8
File Format	PDF
ISBN	1424400740
DOI	10.1109/FREQ.2006.275502
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase noise Oscillators Noise measurement Phase measurement Frequency Temperature sensors Whispering gallery modes Low-noise amplifiers Microstrip filters Microstrip resonators
Content Type	Text
Resource Type	Article

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