Results 51 to 60 of about 195,143 (348)
Quad-Band 3D Rectenna Array for Ambient RF Energy Harvesting
International Journal of Antennas and Propagation, 2020 This paper presents a quad-band, 3D mountable rectenna module for ambient energy harvesting. With the aim of powering up Internet of Things (IoT) nodes in practical ambient environments, a hybrid approach of combining power, both at RF and DC, is adopted
Fatima Khalid +4 more
doaj +1 more source
A Multi-Band Magneto-Electric Dipole Antenna With Wide Beam-Width
IEEE Access, 2020 A multi-band and wide beam-width magneto-electric (ME) dipole antenna is proposed in this report. The proposed antenna has a simple structure, which consists of four $\Gamma $ -shaped electric plates which can change the current distribution and realize ...
Guangwei Yang +4 more
doaj +1 more source
Dual-Frequency Linear-to-Circular Polarization Converter for Ka-Band Applications
Sensors, 2022 A dual-band linear-to-circular planar polarization converter based on a multilayer printed circuit board (PCB) is proposed and demonstrated. Each cell of the periodic surface is formed by six substrate layers separated by five foam spacers. The three top
Francesco Greco, Emilio Arnieri
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Arthritis Care &Research, EarlyView.Objective Ultrasound (US) has been proposed as a potential tool for assessing skin fibrosis in systemic sclerosis (SSc). However, a large‐scale comparison of US‐based assessment with histologic markers of skin fibrosis has not been reported. We evaluated US‐based skin assessments for their face validity (differentiation between involved SSc and healthy
Ruhani Desai +12 more
wiley +1 more source
Millimeter Light Curve with Abrupt Jump in Cyg X-3 2008 April-May Outburst
, 2010 Cyg X-3 is a well-known microquasar with a bipolar relativistic jet. Its famous giant radio outbursts have been repeated once every several years. However, the behavior of the millimeter wave emission has remained unclear because of limitations of time ...
Kotani, Taro +3 more
core +1 more source
Advanced Engineering Materials, Volume 27, Issue 6, March 2025.ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur +5 more
wiley +1 more source
mm-Wave Waveguide Traveling-Wave Power Combiner Design Using an Equivalent Circuit Model
IEEE Access, 2019 The waveguide traveling-wave power combiner (WTWPC) falls into the category of asymmetrical non-isolated power combiners, and, therefore, the active load modulation occurring within the combiner was investigated.
Honglei Sun +3 more
doaj +1 more source
Mutual Decoupling for Massive MIMO Antenna Arrays by Using Triple-Layer Meta-Surface
IEEE Open Journal of Antennas and Propagation, 2022 The high isolation massive antenna arrays are the key devices in the base station of the future wireless communication systems. The challenge for the array application is how to reduce the coupling among the array elements.
Shengyuan Luo +3 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.The effect of temperature controllers that are commonly used in freeze‐casting is investigated in this work. Temperature controllers are observed to generate a voltage in the slurry. Microstructural alignment and ultimate compressive strength data show this voltage to interfere with the ability to align the microstructure using magnetic fields ...
Maddie A. Schmitz, Steven E. Naleway
wiley +1 more source
1-bit reconfigurable transmitarray with low loss and wide bandwidth
New Journal of Physics, 2021 We present a novel X-band 1-bit reconfigurable transmitarray with excellent polarization conversion. The basic element consists of two layers of metal patterns connected by a metal through-hole and feed structures.
Wen Hua Gao +6 more
doaj +1 more source