Results 81 to 90 of about 76,234 (259)
RADIOFREQUENCY PERFORMANCES OF TRANSPARENT ULTRA-WIDEBAND ANTENNAS
Progress In Electromagnetics Research C, 2011 International ...
Hautcoeur, Julien +4 more
openaire +2 more sources
Advanced Materials Interfaces, EarlyView.Ultrathin MXene/EMF composite foams achieve a specific shielding efficiency of 749.6 dB.dB·cm3$\mathrm{dB}\cdot {\mathrm{cm}}^{3}$/g, while the silver‐enhanced MXene/Ag/EMF reaches 81.4 dB shielding effectiveness at just 1.0 mm thickness. Both composites exhibit rapid Joule heating, retain stability up to 250∘C$^\circ{\rm C}$, and withstand 1000 ...
Abdullah A. Mahmood +7 more
wiley +1 more source
A low-profile and ultra-wideband printed antenna with a 176% bandwidth
Journal of Microwaves, Optoelectronics and Electromagnetic ApplicationsThis work reports the development of a simple, low-profile and ultra-wideband printed antenna. The proposed antenna is based on a truncated ground plane and an impedance matching structure formed by a round junction and two chamfers; these modifications ...
R. A. Santos, Arismar Cerqueira S. Jr.
doaj +1 more source
A Large Aperture UWB Antenna Array for Real Beam Radar Imaging
International Journal of Antennas and Propagation, 2012 The development of four-element ultra-wideband (UWB) comb taper slot antenna array with 18 cm element spacing for real beam radar imaging is described. The four-element UWB array system with optimum element spacing is analyzed by energy pattern.
Chao-Hsiang Liao, Dau-Chyrh Chang
doaj +1 more source
Ultra-Wideband 8-Port MIMO Antenna Array for 5G Metal-Frame Smartphones
IEEE Access, 2019 A design of an ultra-wideband eight-port multiple-input multiple-output (MIMO) antenna array in a smartphone with an open-slot metal frame for fifth-generation (5G) communications is presented. Each element is fed by a microstrip line with a tuning stub,
Xugang Zhang +3 more
semanticscholar +1 more source
Applied Sciences, 2020 A planar, microstrip line-fed, quad-port, multiple-input-multiple-output (MIMO) antenna with dual-band rejection features is proposed for ultra-wideband (UWB) applications.
Pawan Kumar, S. Urooj, Fadwa M. Alrowais
semanticscholar +1 more source
Advanced Materials Technologies, EarlyView.This review explores advances in wearable and lab‐on‐chip technologies for breast cancer detection. Covering tactile, thermal, ultrasound, microwave, electrical impedance tomography, electrochemical, microelectromechanical, and optical systems, it highlights innovations in flexible electronics, nanomaterials, and machine learning.
Neshika Wijewardhane +4 more
wiley +1 more source
Applying of Luneburg lens for multi-beam TEM-horn antenna
The Journal of Engineering, 2019 Here, a multi-beam TEM-horn antenna with beam direction is proposed. Presented construction allows obtaining scanning beam and complicated antenna patterns, thus it can be used as substitute of ultra-wideband phased array antennas.
Anatoly M. Bobreshov +4 more
doaj +1 more source
Advanced Materials Technologies, EarlyView.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
Ultra-Wideband Double-Pentagonal Fractal Antenna for C-, X-, Ku- and K-Band Wireless Applications
MicromachinesFractal antennas employ self-similar geometries to generate scaled multiple resonances within compact structures, thereby achieving broadband performance.
Junghyeon Kim +2 more
doaj +1 more source