Results 81 to 90 of about 2,325 (294)
Role of the Recombination Zone in Organic Light‐Emitting Devices
Advanced Materials, EarlyView.This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley +1 more source
, 2012 Dielectric leaky wave antennas based on modulation of surface reactance are presented. Changing the reactance surface pattern changes the radiated field properties.
Minatti, G. +5 more
core +1 more source
Multi-Feed Holographic-Based Leaky Wave Antennas for MIMO-Radar Applications
IEEE Journal of MicrowavesThis paper presents the integration and experimental validation of a multi-feed holographic-based leaky wave antenna (HLWA) array into an automotive MIMO radar system.
Thomas Frey +5 more
doaj +1 more source
n‐Type Polymer Radio Frequency Rectifiers Operating at 18.5 GHz
Advanced Materials, EarlyView.Combining an n‐doped polymer semiconductor with wafer‐scale asymmetric planar electrodes featuring work function‐engineered contacts yields radio‐frequency diodes and rectifying circuits operating at up to 18.5 GHz. The devices combine scalable manufacturing with an operating frequency previously unattainable by large‐area organic electronics ...
Lazaros Panagiotidis +19 more
wiley +1 more source
Omnidirectional 2-D Leaky-Wave Antennas with Reconfigurable Polarization [PDF]
, 2017 Fabry-Perot cavity 2-D leaky-wave antennas with polarization-reconfigurable omnidirectional conical beam are proposed. The antenna cavity is bounded by an annular, locally periodic metal partially-reflective surface and is loaded by a dielectric or a ...
Galli, Alessandro +7 more
core +1 more source
Broadband high-gain planar leaky-wave antennas [PDF]
, 2003 High-gain, low-cost, planar antennas have attracted a lot of interest in recent years, with regard to applications as fixed wireless access, satellite reception and various point-to-point radio links.
Alexandros P. Feresidis (7203416)
core +2 more sources
Miniature Soft Robot With Magnetically Reprogrammable Surgical Functions
Advanced Materials, EarlyView.Miniature soft robots have great prospects to revolutionize minimally invasive treatments. Here we present a miniature soft robot, which can be reprogrammed to perform five surgical functionalities with six‐degrees‐of‐freedom motions. This soft robot can prospectively make minimally invasive surgery considerably safer and painless, and enable ...
Chelsea Shan Xian Ng +4 more
wiley +1 more source
Periodic transmission lines for leaky-wave antenna applications at millimeter wavelengths [PDF]
, 2014 This thesis focuses on planar leaky-wave antennas based on periodic transmission lines with resonant loads also called metamaterial transmission lines operating at millimeter waves.
Zvolensky, Tomas
core +1 more source
Space‐Time Coding Conformal Metasurfaces for Multifrequency Beam Steering and Shaping
Advanced Materials, EarlyView.Space‐time coding conformal metasurfaces enable dynamic wave control on curved surfaces by combining programmable spatial patterns with temporal modulation. This study shows that a single conformal aperture can independently manipulate multiple frequency components, achieving multifunctional beam shaping and steering, with implications for ...
Filippo Pepe +8 more
wiley +1 more source
Terahertz Leaky-Wave Antennas Based on Metasurfaces and Tunable Materials [PDF]
, 2019 Terahertz frequencies are increasingly gaining attention due to the recent efforts made in narrowing the technological gap among microwave and optical components.
Tofani, Silvia +14 more
core +1 more source