Title :
Parametric upconvertor as low-noise i.f. amplifier for microwave mixers
Author :
Downing, O.J. ; Bennewitz, F.O.M. ; Gardiner, J.G.
Author_Institution :
Postgraduate School of Electrical & Electronic Engineering, University of Bradford, Bradford, UK
Abstract :
New equations for the gain and noise performance of v.h.f. parametric upconvertors are presented and applied to the design and performance prediction of a practical upper-sideband circuit intended for application as an i.f. amplifier for microwave mixers. The measured noise figure of 0.67 (±0.1) dB at 9.5 dB gain is shown to correlate with the calculated figure, and to be close to the limiting value of around 0.5 dB at this frequency.
Keywords :
frequency convertors; intermediate-frequency amplifiers; mixers (circuits); noise; parametric amplifiers; VHF; frequency convertors; gain; intermediate frequency amplifiers; mixers (circuits); noise; parametric amplifiers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19740106
