Results 11 to 20 of about 198 (133)
On the virtual cathode oscillator’s energy optimization [PDF]
AIP Advances, 2018 This paper presents a method for the maximization of the energy radiated by a Vircator at a given band of frequencies. The research focuses on axially extracted Vircators. The methodology carried out uses a combination of analytic and numerical techniques.
E. Neira, Y.-Z. Xie, F. Vega
openaire +2 more sources
Development of Repetitive Virtual Cathode Oscillator.
IEEJ Transactions on Fundamentals and Materials, 2003 A new method of repetitive operation of a virtual cathode oscillator was performed using a carbon plate anode with a hole in the center, a knife-edged annular cathode and an external axial magnetic field. Repetitive microwave radiations more than 450 were observed.
Onoi, Masahiro +3 more
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Reflex-triode geometry of the virtual-cathode oscillator [PDF]
Digest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference (IEEE Cat. No.03CH37472), 2004 An eight-stage four-hundred kilovolt Marx bank, in connection with a 60 nanosecond pulse-forming line, is constructed and utilized as a pulsed source to power a planar version of the virtual cathode oscillator (vircator). Eight .1/spl mu/F capacitors, charged to 50 kV each, are switched in series by dry-air pressurized spark gaps.
M.B. Lara +3 more
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A Novel High-Efficiency S-Band Conical Axial Vircator
IEEE AccessA VIRtual CAThode oscillatOR (Vircator) is a High-Power Microwave (HPM) vacuum electron device (VED) with applications in the field of health, energy, space, environment, and defense.
P. Livreri
doaj +1 more source
Advanced Materials Technologies, Volume 11, Issue 13, 8 July 2026.Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu +8 more
wiley +1 more source
Designing Memristive Materials for Artificial Dynamic Intelligence
Advanced Intelligent Discovery, Volume 2, Issue 1, February 2026.Key characteristics required of memristors for realizing next‐generation computing, along with modeling approaches employed to analyze their underlying mechanisms. These modeling techniques span from the atomic scale to the array scale and cover temporal scales ranging from picoseconds to microseconds. Hardware architectures inspired by neural networks
Youngmin Kim, Ho Won Jang
wiley +1 more source
Optically Driven Formation of Tailored Phonon Cavities
Advanced Science, Volume 13, Issue 4, 19 January 2026.It is demonstrated that a structured optical field creates nanoscale “phonon cavities” in van der Waals materials, where atomic vibrations are confined and controlled in space and time. This approach enables programmable control of cavity geometry, symmetry, and frequency, and provides a platform for ultrafast studies of nonequilibrium interactions and
Jianyu Wu +5 more
wiley +1 more source
Enhancing Vircator Efficiency Using Tapered Reflectors With Increasing Interreflector Distance
International Journal of RF and Microwave Computer-Aided Engineering, Volume 2026, Issue 1, 2026.The effectiveness of virtual cathode oscillator (Vircator) applications has been restricted due to the low efficiency in converting the electron beam to microwave. This research introduces the design of an axial Vircator that achieves higher power output by using reflectors in the drift area.
Khuban Lateef Khan +5 more
wiley +1 more source
Carbon Dots: Small Materials With Big Impacts on Optoelectronic Devices
Aggregate, Volume 6, Issue 12, December 2025.This review systematically summarizes the roles of carbon dots in optoelectronic devices, emphasizing their electro‐induced effects, and structural optimization strategies. It further analyzes performance limitations and prospects for the preparation and application of high‐quality carbon dots.
Boyang Wang, Junwei Wang, Siyu Lu
wiley +1 more source
Roles of nanomagnetic beads on biosensing: From fabrication to application
Interdisciplinary Medicine, Volume 3, Issue 4, July 2025.Leveraging their intrinsic superparamagnetic properties and rapid magnetic responsiveness, functionalized nanomagnetic beads have emerged as pivotal platforms in advanced biosensing system. Through surface engineering and structural design, these magnetic nanoparticles demonstrate multi‐capabilities, such as sample separation, signal enhancement, and ...
Junjie Li +11 more
wiley +1 more source