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Frequency stability of millimetre-band reflex klystrons with various cooling techniques

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2 Author(s)
Knight, D.J.E. ; National Physical Laboratory, Teddington, UK ; Brown, E.C.

The fractional frequency deviation ¿y(¿) of free-running conventional reflex klystrons in the 18¿99 GHz range has been measured in the laboratory for 0.01 s ¿ ¿ ¿ 60 s. ¿y(¿) increases as ¿¿ for ¿¿0.1 s. Depending on the individual klystron, water or oil-bath cooling reduces ¿y(¿) by a factor of 2.5¿10, to approximately 5×10¿7 for ¿ = 60 s.

Published in:

Electronics Letters  (Volume:9 ,  Issue: 7 )