Results 81 to 90 of about 2,394,133 (199)

Noise at the Wigner Glass Transition

, 2004
Using a simple model for interacting electrons in two dimensions with random disorder, we show that a crossover from a Wigner liquid to a Wigner glass occurs as a function of charge density.
Reichhardt, C., Reichhardt, C. J. Olson
core   +1 more source

Strong Quantum Spin Correlations Observed in Atomic Spin Mixing

, 2011
We have observed sub-Poissonian spin correlations generated by collisionally induced spin mixing in a spin-1 Bose-Einstein condensate. We measure a quantum noise reduction of -7 dB (-10 dB corrected for detection noise) below the standard quantum limit ...
Christopher D. Hamley, D. Walls, Eva M. Bookjans, H.-A. Bachor, Michael S. Chapman   +4 more
core   +1 more source

0.4 THz Broadband Terahertz Noise Source Based on Photoconductive Antennas

Photonics
Terahertz noise sources have important application prospects in noise figure measurements. In this paper, a 0.4 THz broadband terahertz noise source based on a photoconductive antenna is proposed.
Yinwei Chen, Feifei Qin, Lijuan Liu, Zeyu Zhao, Pu Li, Yuehui Sun, Wenjie Liu, Yuncai Wang   +7 more
doaj   +1 more source

Optimized Cascode LNA design for low noise and high gain at 5 GHz

e-Prime: Advances in Electrical Engineering, Electronics and Energy
The receiver plays a critical role in wireless communication systems, especially for low-power signals known for their durability and speed. As a receiver's front-end component, a Low Noise Amplifier (LNA) amplifies signals to increase power levels while
Md. Hasan Maruf, Arif Hossain, Abdullah Al Mahfuz, Md. Mohi Uddin Mohin, Md. Sabbir Alam, Md. Shakib Ibne Ashrafi, M M Naushad Ali, Md Ashraful Islam   +7 more
doaj   +1 more source

An Approach to Determine Noise Model Parameter for Submicron MOSFET from RF Noise Figure Measurement

IEEE Journal of the Electron Devices Society
An extraction method to obtain the noise model parameter $T_{\mathrm { d}}$ in deep submicron MOSFETs directly from radio frequency (RF) scattering parameters and noise figure measurements is presented. A simplified noise equivalent circuit, along with
Hanqi Gao, Jing Jin, Jianjun Zhou
doaj   +1 more source

Development of Low-noise Preamplifier for Low-field NMR

Chinese Journal of Magnetic Resonance
Nuclear magnetic resonance (NMR) technology enables the acquisition of multi-scale molecular dynamics by characterizing the variation of relaxation times under different magnetic field conditions, thereby offering a critical detection methodology for ...
LI Keyan, CHENG Xin, CHEN Junfei, CAO Li, HUANG Zhen, LIU Chaoyang   +5 more
doaj   +1 more source

Precise Characterization and Multiobjective Optimization of Low Noise Amplifiers [PDF]

Radioengineering, 2015
Although practically all function blocks of the satellite navigation receivers are realized using the CMOS digital integrated circuits, it is appropriate to create a separate low noise antenna preamplifier based on a low noise pHEMT. Such an RF front end
J. Dobes, J. Michal, J. Popp, D. Cerny, M. Grabner, F. Vejrazka, J. Kakona, S. Matejka   +7 more
doaj  

Noise figure of hybrid optical parametric amplifiers

Optics Express, 2012
Following a fiber optical parametric amplifier, used as a wavelength converter or in the phase-sensitive mode, by a phase-insensitive amplifier (PIA) can significantly reduce four-wave mixing between signals in broadband systems. We derive the quantum mechanical noise figures (NF) for these two hybrid configurations, and show that adding the PIA only ...
openaire   +4 more sources

Quantum information tapping using a fiber optical parametric amplifier with noise figure improved by correlated inputs. [PDF]

Sci Rep, 2016
Guo X, Li X, Liu N, Ou ZY.
europepmc   +1 more source

Noise Figure: Estimation of Noise Characteristics of a Radio- Photonic Path Based on the Results of Noise Figure Measurements

Ural Radio Engineering Journal
In radiophotonic microwave transmission systems, as in any radioelectronic systems, noise characteristics determine the potential of accuracy and range. As a measure of the difference between the noise characteristics of optoelectronic microwave signal converters from ideal ones, the use of the noise figures of the elements included in their ...
A. S. Luchinin, I. V. Malygin
openaire   +1 more source