An Active “Cold” Noise Source

Robert H. Frater; David R. Williams

doi:10.1109/TMTT.1981.1130355

An Active “Cold” Noise Source

Robert H. Frater, David R. Williams

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

85 Citations (Scopus)

Abstract

An active circuit which behaves like a “cold” noise source is described. The circuit, which uses a gallium arsenide FET is given the name COLFET. The appropriate theory is developed and practical circuits described using the circuit. Equivalent noise temperatures of less than 50 K have been measured for a 50–Ω source at 1400 MHz.

Original language	English
Pages (from-to)	344-347
Number of pages	4
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	29
Issue number	4
DOIs	https://doi.org/10.1109/TMTT.1981.1130355
Publication status	Published - 1981
Externally published	Yes

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10.1109/TMTT.1981.1130355

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abstract = "An active circuit which behaves like a “cold” noise source is described. The circuit, which uses a gallium arsenide FET is given the name COLFET. The appropriate theory is developed and practical circuits described using the circuit. Equivalent noise temperatures of less than 50 K have been measured for a 50–Ω source at 1400 MHz.",

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AB - An active circuit which behaves like a “cold” noise source is described. The circuit, which uses a gallium arsenide FET is given the name COLFET. The appropriate theory is developed and practical circuits described using the circuit. Equivalent noise temperatures of less than 50 K have been measured for a 50–Ω source at 1400 MHz.

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An Active “Cold” Noise Source

Abstract

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