Low Phase Noise UHF TCXO

D. V. Bogomolov, R. Boroditsky

Abstract:	Low phase noise, good frequency stability over wide temperature range, tight initial frequency calibration and low power consumption of the signals sources are essential for many modern communication applications operating in UHF frequency band. The best sample of TCXO can provide good combination of these parameters only in 10÷50 MHz frequency band. A frequency translation technique should be applied to transform those signals in UHF band without phase noise degradation. UHF VCXO looked by PLL on a signal of 10Mhz TCXO allows to keep a good temperature stability and to achieve a phase noise level L?(1 kHz)=-108 dBc/Hz at 1 GHz carrier frequency. The circuit optimization allows decreasing an influence of PLL noise and obtaining a spectral purity of output signal, the level of a comparison frequency signal doesn’t exceed –85dBc.
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	509 - 511
Cite this article:	Bogomolov, D. V., Boroditsky, R., "Low Phase Noise UHF TCXO," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 509-511.
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