Trade‐off between preamplifier noise figure and decoupling in MRI detectors
Sign Up to like & getrecommendations! Published in 2022 at "Magnetic Resonance in Medicine"
DOI: 10.1002/mrm.29489
Abstract: There is a limit to the maximum achievable preamplifier decoupling. In many cases, this level is not enough. To overcome this limit, the preamplifier noise figure can be compromised for further decoupling increase. This is… read more here.
Keywords: trade preamplifier; mri; preamplifier noise; noise figure ... See more keywords
Noise Figure Degradation in Balanced Amplifiers
Sign Up to like & getrecommendations! Published in 2017 at "IEEE Microwave and Wireless Components Letters"
DOI: 10.1109/lmwc.2017.2734745
Abstract: 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… read more here.
Keywords: figure; figure degradation; divider; degradation balanced ... See more keywords
A Ka/V Band-Switchable LNA With 2.8/3.4 dB Noise Figure
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Microwave and Wireless Components Letters"
DOI: 10.1109/lmwc.2019.2939540
Abstract: A $0.13~\mu \text{m}$ SiGe BiCMOS band-switchable low noise amplifier (LNA) is developed which can be operated at 28 or 60 GHz. The LNA employs an LC tank at the input to perform dual-band impedance matching,… read more here.
Keywords: tex math; band switchable; band; inline formula ... See more keywords
An Ultra-Low Noise Figure and Multi-Band Re-Configurable Low Noise Amplifier
Sign Up to like & getrecommendations! Published in 2023 at "IEEE Transactions on Circuits and Systems I: Regular Papers"
DOI: 10.1109/tcsi.2022.3229135
Abstract: In this article, we design and fabricate an ultra-low noise figure, multi-band low noise amplifier (LNA) monolithic microwave integrated circuit (MMIC) using ${0.25~\mu \text {m}}$ GaAs pHEMT process. The proposed LNA’s performance results from a… read more here.
Keywords: inline formula; noise figure; low noise; tex math ... See more keywords
Optimization of the conversion efficiency and evaluation of the noise figure of an optical frequency converter based on a dual-pump fiber phase sensitive amplifier.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.471087
Abstract: We propose a new architecture of phase sensitive optical frequency converter based on dual-pump phase sensitive amplification in a highly nonlinear fiber. This frequency converter allows generation of extra tones through nonlinear four-wave mixing between… read more here.
Keywords: phase sensitive; noise figure; frequency converter; phase ... See more keywords
Phase evolution of the direct detection noise figure of a nondegenerate fiber phase-sensitive amplifier.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.004546
Abstract: We experimentally investigate the evolution of the direct detection noise figure of a nondegenerate phase-sensitive amplifier based on a nonlinear fiber, as a function of the relative phase between the signal, idler, and pump, all… read more here.
Keywords: phase; evolution direct; noise figure; phase sensitive ... See more keywords
40 dB gain all fiber bismuth-doped amplifier operating in the O-band.
Sign Up to like & getrecommendations! Published in 2019 at "Optics letters"
DOI: 10.1364/ol.44.002248
Abstract: In this Letter, we investigate and compare the gain and noise figure characteristics of bismuth (Bi)-doped fiber amplifiers configured in both single and double signal pass implementations. A maximum gain of 25 dB and a noise… read more here.
Keywords: gain noise; gain; noise figure; pass ... See more keywords