Ultra-Stable Very-Low Phase-Noise Signal Source for Very Long Baseline Interferometry Using a Cryocooled Sapphire Oscillator

Nitin R. Nand; John G. Hartnett; Eugene N. Ivanov; Giorgio Santarelli

doi:10.1109/TMTT.2011.2166976

Ultra-Stable Very-Low Phase-Noise Signal Source for Very Long Baseline Interferometry Using a Cryocooled Sapphire Oscillator

Nitin R. Nand^*, John G. Hartnett, Eugene N. Ivanov, Giorgio Santarelli

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

The design and implementation of a novel frequency synthesizer based on low phase-noise digital dividers and a direct digital synthesizer is presented. The synthesis produces two low-noise accurate tunable signals at 10 and 100 MHz. We report the measured residual phase noise and frequency stability of the synthesizer and estimate the total frequency stability, which can be expected from the synthesizer seeded with a signal near 11.2 GHz from an ultra-stable cryocooled sapphire oscillator (cryoCSO).

Original language	English
Article number	6032721
Pages (from-to)	2978-2986
Number of pages	9
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	59
Issue number	11
DOIs	https://doi.org/10.1109/TMTT.2011.2166976
Publication status	Published - Nov 2011

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AU - Santarelli, Giorgio

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Ultra-Stable Very-Low Phase-Noise Signal Source for Very Long Baseline Interferometry Using a Cryocooled Sapphire Oscillator

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