A sampling wattmeter for noise power measurements

Luca Callegaro; Marco Pisani

doi:10.1117/12.608787

23 May 2005 A sampling wattmeter for noise power measurements

Luca Callegaro, Marco Pisani

Proceedings Volume 5844, Noise in Devices and Circuits III; (2005) https://doi.org/10.1117/12.608787
Event: SPIE Third International Symposium on Fluctuations and Noise, 2005, Austin, Texas, United States

Abstract

Low-frequency noise measurements are usually performed by measuring the voltage across a dipole, or the current through a wire. Here we demonstrate the feasibility of the measurement of the noise power flowing through a line connecting two dipoles. A sampling wattmeter, with spectral display capabilities, having a bandwidth in the range 1 Hz - 10 kHz and sensitivity better than 10^-22 W/Hz is here described, and employed to measure the noise power flowing between two resistors at different temperatures. Possible applications of the device include noise thermometry, noise measurement of active devices under load condition, investigations of excess noise below thermal threshold.

Citation Download Citation

Luca Callegaro and Marco Pisani "A sampling wattmeter for noise power measurements", Proc. SPIE 5844, Noise in Devices and Circuits III, (23 May 2005); https://doi.org/10.1117/12.608787

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