Results 41 to 50 of about 2,260,510 (314)
A Substrate Integrated Gap Waveguide Based Wideband 3-dB Coupler for 5G Applications
IEEE Access, 2018 A wideband 3-dB coupler using substrate integrated gap waveguide (SIGW) is proposed based on the principle of the branch-line coupler structure. The SIGW coupler design is comprehensively studied.
Dongya Shen, Ke Wang, Xiupu Zhang
doaj +1 more source
SIW Butler Matrix with Modified Hybrid Coupler for Slot Antenna Array
IEEE Access, 2016 This paper presents a substrate integrated waveguide Butler matrix with a modified hybrid coupler, operating from 28 to 32 GHz. The modified hybrid coupler is realized by using 90° hybrid coupler followed by a −45° compensating phase shifter.
Qingling Yang +4 more
semanticscholar +1 more source
Molecular bases of circadian magnesium rhythms across eukaryotes
FEBS Letters, EarlyView.Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley +1 more source
Implementation features of the microstrip filters with traveling wave ring resonators
Технологія та конструювання в електронній апаратурі, 2012 The article prsents a block diagram of a traveling wave directional filter, and a system of analytic expressions which defines the levels of the signals in the filter branches. Implementation features of the filter in the microstrip design are considered.
E. N. Glushechenko
doaj
Integrated dual-mode 3 dB power coupler based on tapered directional coupler
Scientific Reports, 2016 A dual-mode 3 dB power coupler based on silicon-on-insulator platform for mode division multiplexing system is proposed and demonstrated. The device, which consists of a tapered directional coupler and two output bend waveguides, has a 50:50 coupling ...
Yuchan Luo +4 more
semanticscholar +1 more source
FEBS Letters, EarlyView.This perspective highlights emerging insights into how the circadian transcription factor CLOCK:BMAL1 regulates chromatin architecture, cooperates with other transcription factors, and coordinates enhancer dynamics. We propose an updated framework for how circadian transcription factors operate within dynamic and multifactorial chromatin landscapes ...
Xinyu Y. Nie, Jerome S. Menet
wiley +1 more source
Revista IBRACON de Estruturas e Materiais, 2018 The use of mechanical splices to connect steel bars is an important solution in many infrastructure projects worldwide. In Brazil, this system is rarely used.
V. G. CHIARI, A. L. MORENO JUNIOR
doaj +2 more sources
Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source
2.5 MeV Traveling Wave Tube Design
Yuanzineng kexue jishu, 2022 The 25 MeV wastewater treatment electron linear accelerator uses a 15 MW klystron as the microwave power source, which provides a microwave power no less than 13 MW at the entrance of the traveling wave tube, and accelerates the electron beam to 25
WANG Bo;YANG Jinghe;YANG Yu;ZENG Ziqiang
doaj
The newfound relationship between extrachromosomal DNAs and excised signal circles
FEBS Letters, EarlyView.Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley +1 more source