Results 71 to 80 of about 890,396 (390)
IEEE Access, 2018 A highly shielded and easy-integration antenna-in-package (AiP) configuration based on the rectangular hollow dielectric resonator antenna (DRA) is presented.
Sheng-Jie Guo +3 more
doaj +1 more source
2.45 GHz Active Isolator based on asymmetric coupler
Automatika, 2021 An active isolator achieving both high isolation and low insertion loss at 2.45 GHz is proposed. The isolator is based on an asymmetric coupler and is designed to leverage the gain and reverse isolation of an amplifier and coupling coefficients between ...
Ui-Gyu Choi +3 more
doaj +1 more source
Active rc filter permits easy trade-off of amplifier gain and sensitivity to gain [PDF]
, 1968 Passive RC network was designed with zeros of transmission in the right half of the complex frequency plane in the feedback loop of a simple negative-gain amplifier.
Kerwin, W. J., Shaffer, C. V.
core +1 more source
Experimental demonstration of a W-band gyroklystron amplifier [PDF]
, 1997 The experimental demonstration of a four cavity W-band (93 GHz) gyroklystron amplifier is reported. The gyroklystron has produced 67 kW peak output power and 28% efficiency in the TE011 mode using a 55 kV, 4.3 A electron beam.
Blank, M +4 more
core +1 more source
A stepwise emergence of evolution in the RNA world
FEBS Letters, EarlyView.How did biological evolution emerge from chemical reactions? This perspective proposes a gradual scenario of self‐organization among RNA molecules, where catalytic feedback on random mixtures plays the central role. Short oligomers cross‐ligate, and self‐assembly enables heritable variations. An event of template‐externalization marks the transition to
Philippe Nghe
wiley +1 more source
Thulium-doped fiber amplifier for optical communications at 2µm
2013 Optical Fiber Communication Conference and Exposition and the National Fiber Optic Engineers Conference (OFC/NFOEC), 2013 We report the realization of a thulium doped fiber amplifier designed for optical communications providing high gain (>35dB) and low noise figure (
Zhihong Li +5 more
semanticscholar +1 more source
Amplification of Fluctuations in a Spinor Bose Einstein Condensate
, 2008 Dynamical instabilities due to spin-mixing collisions in a $^{87}$Rb F=1 spinor Bose-Einstein condensate are used as an amplifier of quantum spin fluctuations.
Cohen, M. L. +5 more
core +1 more source
FEBS Letters, EarlyView.The enzyme 5‐lipoxygenase (5‐LOX) catalyzes the first step in the biosynthesis of leukotrienes (LTs) involved in inflammatory pathophysiology. After cellular stimulation, 5‐LOX translocates to the nucleus, interacting with the 5‐LOX‐activating protein (FLAP) to form LTA4 from arachidonic acid (AA).
Erik Romp +5 more
wiley +1 more source
40 GHz Monolithic Grid Amplifier [PDF]
, 1995 A 36-element monolithic grid amplifier has been fabricated. The peak gain is 4 dB at 40 GHz with a 3-dB bandwidth of 800 MHz. We discuss the design and measurements for the monolithic grid amplifier.
Liu, Cheh-Ming +2 more
core
FEBS Letters, EarlyView.UDP‐glucuronic acid 4‐epimerase (UGAepi) catalyzes NAD+‐dependent interconversion of UDP‐glucuronic acid (UDP‐GlcA) and UDP‐galacturonic acid (UDP‐GalA) via C4‐oxidation, 4‐keto‐intermediate rotation, and C4‐reduction. Here, Borg et al. examined the role of the substrate's carboxylate group in the enzymic mechanism by analyzing NADH‐dependent reduction
Annika J. E. Borg +2 more
wiley +1 more source