Journal
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
Volume 22, Issue 2, Pages 85-87Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LMWC.2011.2181347
Keywords
ATACAMA; cryogenic sapphire oscillators (CSO); CW source; doubler; EHF; high-q; mm-wave; multiplication; oscillator; sapphire; SKA; stability; synthesis; very long baseline interferometry (VLBI)
Categories
Funding
- Australian Research Council [DP0878108, FL0992016]
- Australian Research Council [DP0878108] Funding Source: Australian Research Council
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We report the generation of millimeter wave signals with frequency instability of a few parts in 10(16). Such performance was achieved at 103.750 GHz by frequency multiplication of two nominally identical 12.969 GHz oscillators based on liquid helium cooled sapphire dielectric resonators. The multiplication stages were shown to only add a small amount of noise at averaging times less than 10 s, resulting in a minimum of frequency instability of 5 x 10(-16) at 20 s averaging time. Such ultra-stable signal sources operating at frequencies of 100 GHz are very important for many applications including high frequency radio astronomy.
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