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A Noise Investigation of Tunnel-Diode Microwave Amplifiers

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2 Author(s)
A. Yariv ; Bell Telephone Labs., Inc., Murray Hill, N.J. ; J. S. Cook

An analysis and derivation of the noise figure of a tunnel-diode microwave amplifier are presented. The agreement between the measured noise figure and the theoretical results is an indirect check on the existence of full shot noise in germanium tunnel diodes at microwave frequencies. The limiting noise temperature of the amplifier is eI0R/2k, and can be approached by using diodes with small (RC) products in which the extreme overcoupling (load mismatch) and high gain can be achieved simultaneously.

Published in:

Proceedings of the IRE  (Volume:49 ,  Issue: 4 )