Title :
Noise figure measurement of three-port differential low-noise amplifiers
Author :
Prinsloo, D.S. ; Meyer, P.
Author_Institution :
Dept. of Electr. & Electron. Eng., Stellenbosch Univ., Stellenbosch, South Africa
Abstract :
A measurement procedure to de-embed the noise figure (NF) of a three-port differential low-noise amplifier (LNA) from single-ended (SE) measurements is presented. An approximate solution for the differential NF is found in terms of two SE noise figure and gain measurements and the sensitivity of the de-embedded NF to unsymmetrical performance is analysed. The theory presented is applied to a three-port differential LNA and the de-embedded NF is compared to that of an equivalent SE LNA design.
Keywords :
approximation theory; gain measurement; low noise amplifiers; noise measurement; SE gain measurements; SE measurements; SE noise figure measurement; approximate solution; differential NF; equivalent SE LNA design; single-ended measurements; three-port differential LNA; three-port differential low-noise amplifiers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2012.0638
