Results 21 to 30 of about 2,394,133 (199)
Effect of Bismuth Doping on Noise Figure of Er-Doped Silica Fiber
IEEE Photonics Journal, 2023 We investigate the spectral and amplification characteristics of Bi/Er co-doped fiber (BEDF) and Er-doped fiber (EDF), prepared by atomic layer deposition (ALD).
Weizhu Ji +7 more
doaj +1 more source
, 2004 This paper reports the first 24-GHz CMOS front-end in a 0.18-µm process. It consists of a low-noise amplifier (LNA) and a mixer and downconverts an RF input at 24GHz to an IF of 5 GHz.
Guan, Xiang, Hajimiri, Ali
core +1 more source
IEEE Journal of the Electron Devices Society, 2023 In this research, $\Gamma $ -gated AlGaN/GaN HEMTs with different layout designs and heights of gate stems were fabricated to investigate their impacts on the noise performance in the Ka-band.
Ping-Hsun Lee +6 more
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Multi-Way Noiseless Signal Amplification in a Symmetrical Cascaded Four-Wave Mixing Process
Photonics, 2022 According to the fundamental laws of quantum optics, vacuum noise is inevitably added to the signal when one tries to amplify a signal. However, it has been recently shown that noiseless signal amplification can be realized when a phase-sensitive process
Hailong Wang +5 more
doaj +1 more source
Noise Figure of a Balanced Amplifier [PDF]
IEEE Transactions on Circuits and Systems II: Express Briefs, 2018 Noise figure expression of a balanced amplifier built with lossy divider and combiner and two imperfectly noise-matched component amplifiers is derived analytically using the method of noise waves in terms of the noise parameters of the amplifiers. We present analytical expressions for the three noise parameters of the balanced amplifier.
Akif Alperen Coskun, Abdullah Atalar
openaire +2 more sources
Decreased noise figure measurement uncertainty in Y factor method [PDF]
Advances in Radio Science, 2013 Almost always noise figure is measured today by using a matched noise source delivering two different but known noise temperatures (Y factor method). In commercially available noise sources these temperatures are characterized by the excess noise ratio ...
I. Gaspard
doaj +1 more source
FULLY OPTIMIZED ULTRA WIDEBAND RF RECEIVER FRONT END
Jordanian Journal of Computers and Information Technology, 2022 This paper proposes a novel and fully optimized Ultra-wideband rf receiver front end in UMC 180nm 1P6M CMOS process. The heterodyne architecture used in this work does not use the on-chip image reject mixer.
Rajesh Khatri, D. K. Mishra
doaj +1 more source
Noise Figure Degradation in Balanced Amplifiers [PDF]
IEEE Microwave and Wireless Components Letters, 2017 Balanced amplifiers suffer from the noise figure performance in comparison with a stand-alone amplifier even with an ideal input divider. The noise parameters degrade further with an imperfect divider. We present exact and approximate analytical results for the noise figure and noise parameters of the balanced amplifier in divider topology. Measurement
Akif Alperen Coskun, Abdullah Atalar
openaire +3 more sources
Noise suppression by noise [PDF]
, 2001 We have analyzed the interplay between an externally added noise and the intrinsic noise of systems that relax fast towards a stationary state, and found that increasing the intensity of the external noise can reduce the total noise of the system.
A. van der Ziel +23 more
core +2 more sources
New Results on the Noise Figure of HEMTs
Active and Passive Electronic Components, 1993 In this communication, an accurate mathematical model for the noise figure of a high electron mobility transistor is developed. This model represents a substantial improvement of the Fukui model.
M. A. Grado Caffaro, M. Grado Caffaro
doaj +1 more source