Results 91 to 100 of about 10,259 (303)
Perspective: Hollow Core Optical Fibres for Ultraviolet and Visible Wavelengths
Advanced Science, EarlyView.Hollow core optical fibres bypass material constraints that limit optical fibres at ultraviolet and visible wavelengths. However, their challenging fabrication has limited their development, and significant gains in performance remain possible. In this perspective we outline approaches to enable the next generation of fibres for shorter wavelengths ...
Robbie Mears +5 more
wiley +1 more source
Cascomp BJT Amplifier vs. traditional configurations
, 2012 All transistor circuits introduce distortion. In Radio Frequency (RF) circuits, the third-order distortion components are the most important. The quest for more linear circuits has become more important with complex-modulation as used in modern cellular ...
Scott, Jonathan B. +2 more
core
Advanced Science, EarlyView.Photonic time crystals (PTCs) are systems in which electromagnetic parameters are modulated periodically in time, producing momentum bandgaps via temporal scattering rather than spatial Bragg processes. This review examines the theoretical frameworks, modeling, and computational tools for time‐varying media, and summarizes experimental demonstrations ...
Ranjan Kumar Patel +3 more
wiley +1 more source
Broadband GaN Class-E Power Amplifier for Load Modulated Delta Sigma and 5G Transmitter Applications
IEEE Access, 2018 The paper presents a design of a broadband high-efficiency class-E power amplifier (PA) for the advanced efficiency enhancement architectures applications.
Tushar Sharma +3 more
doaj +1 more source
Advanced Science, EarlyView.An on‐demand ultra‐reconfigurable intelligent vision system with hierarchical reconfigurability from device to system levels is demonstrated. Through co‐design of a multi‐paradigm device, reconfigurable circuits, and adaptive system architecture/algorithms, the system enables seamless switching among spiking, non‐spiking, neuromorphic imaging (NI), and
Biyi Jiang +7 more
wiley +1 more source
Broadband H-Band Power Amplifier with Optimum Intermediate Splitter and Combiner Impedance
1518This paper reports the successful application of an optimum intermediate impedance in the splitter/combiner structure between the parallelization paths of a five-stage common-source amplifier design to achieve a broadband power amplifier.
Wrana, Dominik +6 more
core +1 more source
A broadband 220-320 GHz medium power amplifier module
, 2022 4 S.In this paper, we present the development of an ultra-broadband H-band (220 - 325 GHz) submillimeterwave monolithic integrated circuit (S-MMIC) medium power amplifier (MPA) module for use in next generation highresolution imaging systems and ...
Kuri, Michael +10 more
core +1 more source
Smart Nanotechnologies for Multimodal Neuromodulation and Brain Interfacing
Advanced Science, EarlyView.Recent advances in smart nanotechnologies are expanding the toolbox for brain interfacing, from wireless neuromodulation and high‐resolution sensing to targeted delivery within the central nervous system. By combining responsive nanomaterials with bioinspired design, these platforms enable multimodal interactions with neurons and glia, while also ...
Tommaso Curiale +6 more
wiley +1 more source
Advanced Science, EarlyView.A real‐time, non‐contact photoplethysmography (PPG) system based on InAs colloidal quantum dots (CQDs) synthesized via a seedless injection synthesis is demonstrated. The measured oxygen saturation shows considerable agreement with commercial PPG devices.
Beom Kwan Kim +8 more
wiley +1 more source
Development of high-energy fiber CPA system
EPJ Web of Conferences, 2013 An intense broadband laser system based on a Nd:glass chirped pulse amplifier (CPA) requires a stable front end with good beam quality. To prepare such a front end without using a regenerative amplifier or optical parametric chirped pulse amplification ...
Ogino J. +4 more
doaj +1 more source