Results 251 to 260 of about 669,562 (292)

Noise figure of m.e.s.f.e.t.s

IEE Proceedings I Solid State and Electron Devices, 1980
The noise figure of a m.e.s.f.e.t. is calculated as a function of drain current using the gradual channel approximation and the Shockley impedance-field technique. The results are conveniently presented as a single universal family of curves with no adjustable empirical factors.
C.R. Brewitt-Taylor, P.N. Robson, J.E. Sitch   +2 more
openaire   +1 more source

Optical noise figure: theory and measurements

OFC 2001. Optical Fiber Communication Conference and Exhibit. Technical Digest Postconference Edition (IEEE Cat. 01CH37171), 2001
We examine the concept of optical noise figure in to two-port devices. Definitions of noise figure are discussed along with applications of noise figure to circuits incorporating cascades of amplifiers and other optical and optoelectronic devices.
Rodney S. Tucker, Douglas M. Baney
openaire   +1 more source

A technique for differential noise figure measurement with a noise figure analyzer [Technical Committee]

IEEE Microwave Magazine, 2009
This article summarizes a new approach presented in [1] to measure the noise figure of a differential low-noise amplifier (LNA) based on familiar cold-hot single-ended noise figure measurements employed by the majority of noise figure analyzers/meters.
Leonid Belostotski, James Haslett
openaire   +1 more source

Impact of Amplifier Noise Figure on Network Throughput

Optical Fiber Communication Conference, 2016
The impact of the amplifier noise figure (NF) on the optical network throughput is quantified from an information viewpoint. For every dB of NF decrease, throughput gains between 4% and 7% are reported.
Alvarado, A., Ives, D.J., Savory, S.J., Bayvel, P.   +3 more
openaire   +3 more sources

Impact of Noise Figure on a Satellite Link Performance

IEEE Communications Letters, 2011
Small satellite link performance analysis is critical for assessing the adequacy of a transmitter to successfully transfer data at the desired rate. This is especially obvious when considering highly adaptive small satellite systems that exhibit static and active/dynamic power requirements.
Sunday C. Ekpo, Danielle George
openaire   +2 more sources

Noise figure test-set for simultaneous measurements of gain and noise figure of microwave devices

Proceedings of 8th Mediterranean Electrotechnical Conference on Industrial Applications in Power Systems, Computer Science and Telecommunications (MELECON 96), 2002
A simple method to characterize in term of noise figure and available gain both matched and mismatched devices is down. Comparison with conventional method is reported to show the validity of the method proposed that provides an effective way of employing commercial noise figure meters.
A. Di Paola, M. Sannino
openaire   +1 more source

NOISE FIGURES, NOISE TEMPERATURES, AND SYSTEM SENSITIVITY

1961
Abstract : The definitions of terms used in systems noise work are presented, as well as general techniques of describing noise power resulting from both the source and the excess noise added by the network under consideration. A unique feature presented is a unified development of 7 noise temperatures encountered in this field, with tables showing the
null PHILIP H., Jr ENSLOW
openaire   +1 more source

Comparison of noise figure calibration and measurement techniques using noise figure verification techniques

75th ARFTG Microwave Measurement Conference, 2010
We perform noise figure calibrations on a noise measurement receiver using the following techniques: A “Y-factor” technique that uses two source impedance states (a characterized “excess” noise source and a low reflection room temperature termination) in both the calibration and the measurement, a “Vector Cold Noise (VCN)” technique that uses multiple ...
Bob Shoulders, Ken Wong
openaire   +1 more source

Matrix Representations of Noise Figures and Noise Figure Charts in Terms of Power Wave Variables

IEEE Transactions on Microwave Theory and Techniques, 1968
The noise power, excess exchangeable noise figure, and excess transducer noise figure of a linear active two-port are represented by the power wave scattering transfer matrix. It follows that these noise figures are expressed as ratios of two Hermitian forms, and that their stationary values and the reflection coefficients at the input which yields ...
K. Hirano, S. Kanema
openaire   +1 more source

Noise figure in UWB systems

2007 7th International Conference on ASIC, 2007
Noise figure (NF) is a commonly used system parameter that quantifies the degradation in the signal-to-noise ratio (SNR) as the signal passes through a system. Different from the narrow band systems, the energy of the transmitted signal spread on wide band in the UWB (Ultra Wide Band) systems.
Wang Yao, Wei Li, Zhiyong Luo, Junyan Ren   +3 more
openaire   +1 more source