Results 81 to 90 of about 624,104 (285)
Overview of Vivaldi Antenna Selection for Through-Wall Radar Applications
SensorsThis paper analyzes broadband antennas, with a special focus on Vivaldi antennas, for their suitability for through-wall radar applications. It assesses various antenna designs, emphasizing high gain, wide impedance bandwidth, and effective wall ...
Mariana Amador +3 more
doaj +1 more source
Design of Two Novel Dual Band-Notched UWB Antennas
International Journal of Antennas and Propagation, 2012 Two novel dual band-notched ultra-wideband (UWB) printed monopole antennas with simple structure and small size are presented. The size of both antennas is 25×25×0.8 mm3.
Bing Li, Jing-song Hong
doaj +1 more source
UWB Sensor Nodes for Tracking of Human Motion in Medical and Rehabilitation Applications
EAI Endorsed Transactions on Mobile Communications and Applications, 2016 This paper presents the experimental and investigational studies involving the use of compact ultra-wideband sensor nodes for tracking the human body motion. A standalone ultra-wideband positioning system developed by making use of commercially available
Manmohan Sharma +2 more
doaj +1 more source
Engineering Slow‐Carrier Interfacial Recombination Enables Tailored Spectral Response
Advanced Science, EarlyView.This work demonstrates that weak‐drift slow carriers are preferentially captured at generic semiconductor surfaces/interfaces and recombine. This process is manipulated to achieve tailored spectral response. A tens of µm‐wide depletion region is created to observe surface collection rates for photocarriers generated at different positions.
Yibo Zhang +5 more
wiley +1 more source
Physics‐Aware Machine‐Learning‐Driven Inverse Design of Broadband Ultra‐Open Acoustic Metamaterials
Advanced Science, EarlyView.A physics‐aware machine‐learning framework enables inverse design of ultra‐open acoustic silencers by decoupling spectral and radial design spaces. The approach rapidly identifies broadband, compact, and highly ventilated architectures, while revealing hidden linear design rules that link geometry, impedance matching, and acoustic performance.
Zhiwei Yang +5 more
wiley +1 more source
Performance evaluation of OFDM and impulse-radio ultra-wideband over fiber distribution for in-building networks [PDF]
, 2009 This paper reports the compared performance of the two main ultra-wideband (UWB) implementations, OFDM-based (OFDM-UWB) and impulse-radio UWB, when transmitted over optical fiber for in-building communications employing external electro-optic modulation.
Roberto Llorente +7 more
core +1 more source
Advanced Science, EarlyView.Chemical vapor deposition produces large‐grain, phase‐pure CsPbBr3 films (grains up to 35 µm) with Drude‐like terahertz photoconductivity and twofold higher carrier mobility versus spin‐coated references. These microstructural advances translate into photodetectors with a detectivity of 8.4 × 1012 Jones, dark current below 1 pA cm−2, X‐ray sensitivity ...
Roel Vanden Brande +14 more
wiley +1 more source
Ultra-Wideband Dielectric Lens Antennas for Beamsteering Systems
International Journal of Antennas and Propagation, 2019 This paper presents a high-directivity ultra-wideband beamsteering antenna array. An innovative beamsteering system based on hemispherical dielectric lenses fed by a set of different printed antennas is proposed. Diversity of signals in different spatial
Renan Alves dos Santos +4 more
doaj +1 more source
Development of Ultra-Wideband Antennas [PDF]
Journal of electromagnetic engineering and science, 2013 The ultra-wideband (UWB) spectrum available for commercial applications has offered us an opportunity to achieve high-speed wireless communications and high-accuracy location applications. As one of key research areas in UWB technology, a lot of innovative broadband and miniaturization techniques for UWB antennas have been greatly invented and ...
openaire +1 more source
Evaluation of microplasma discharges as active components for reconfigurable antennas [PDF]
, 2012 This paper presents an experimental setup for the wideband RF characterization of plasma Micro Hollow Cathode Sustained Discharge (MHCD). This microdischarge is studied as a candidate for integrated active component in antennas, using the change of ...
Pascal, Olivier +9 more
core +1 more source