Results 41 to 50 of about 36,496 (304)
IEEE AccessThis paper proposes a modified Schiffman structure to implement a wideband, low-loss 4-bit digital phase shifter. Here, low-cost positive intrinsic negative (PIN) diodes are used for electronically controlling the phase states of the phase shifter.
Mostafa Khazaei +2 more
doaj +1 more source
Direct digital control of an efficient silicon+lequid crystal phase shifter [PDF]
, 2014 We demonstrate a phase shifter based on a silicon slot waveguide infiltrated with liquid crystal. We achieve a phase shift of 73 pi for a 5V drive voltage, with a voltage-length product of 0.022V.mm around 1V. We can drive the phase shifter directly with
Absil, P +12 more
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Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM
FEBS Letters, EarlyView.Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley +1 more source
Ultra-Wideband 4-Bit Distributed Phase Shifters Using Lattice Network at
IEEE Open Journal of the Solid-State Circuits SocietyIn this article, we introduce an ultra-wideband 4-bit distributed phase shifter using a lattice network. To achieve wider bandwidth, the proposed phase shifter employed an all-pass lattice network instead of the traditional low-pass ladder network. Seven
Sungwon Kwon +2 more
doaj +1 more source
IEEE Photonics Journal, 2020 Broadband image-reject mixing using a dual-channel polarization-modulated photonic microwave phase shifter is proposed and experimentally demonstrated.
Yamei Zhang +6 more
doaj +1 more source
Energy-efficient integrated silicon optical phased array
Frontiers of Optoelectronics, 2023 An optical phased array (OPA) is a promising non-mechanical technique for beam steering in solid-state light detection and ranging systems. The performance of the OPA largely depends on the phase shifter, which affects power consumption, insertion loss ...
Huaqing Qiu +5 more
doaj +1 more source
A TCAD study on the effect of process parameters on silicon optical phase shifter performance
Frontiers in Physics, 2023 On-chip integrated optical phase shifters are an important part of optical phase modulators. The performance of such modulators relies heavily on the phase shifter performance, which in turn depends on multiple process parameters.
Darpan Mishra +2 more
doaj +1 more source
Organoids in pediatric cancer research
FEBS Letters, EarlyView.Organoid technology has revolutionized cancer research, yet its application in pediatric oncology remains limited. Recent advances have enabled the development of pediatric tumor organoids, offering new insights into disease biology, treatment response, and interactions with the tumor microenvironment.
Carla Ríos Arceo, Jarno Drost
wiley +1 more source
Phase Shifter for Millimeter-Wave Frequency Range Based on Glide Symmetric Structures [PDF]
, 2019 The use of glide symmetry in radiofrequency devices to introduce dispersive effects has been recently proposed and demonstrated. One of these effects is to control the propagation constant of the structure.
Alex-Amor, Antonio +4 more
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FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source