Results 41 to 50 of about 549,184 (227)

RFID Antenna for UHF Band [PDF]

Carpathian Journal of Electronic and Computer Engineering, 2019
Abstract This paper presents a method to increase the detection range for RFID readers in the UHF radio band. The design is following especially the ISO 18000-6C standardization demands for the UHF band, operating from 865 to 868 MHz in Europe and from 902 to 928 MHz in North America.
openaire   +1 more source

A targeted antiferromagnetic nanoprobe for ultra‐sensitive magnetic resonance imaging detection of sub‐millimeter esophageal tumors

BMEMat, EarlyView.
We developed a cyclo‐RGD peptide‐conjugated antiferromagnetic nanoparticle (RANP) as a targeted T1 contrast agent. Under 9 T MRI conditions, RANP exhibited an r1 value of 1.88 mM−1 s−1 and a low r2/r1 ratio of 1.84, enabling the detection of esophageal tumors as small as 0.8 mm in vivo. Abstract Early, non‐invasive detection of esophageal cancer at sub‐
Wenkui Mo, Zeyu Liang, Bo Zhang, Lin Xiao, Xun Liu, Zhigao Yi, Shangzhi Xie, Qiyue Wang, Liang Shi, Taobo Luo, Feng Li, Leilei Wu, Yuanzhe Piao, Fangyuan Li, Jian Zeng, Daishun Ling   +15 more
wiley   +1 more source

Systematic design and prototyping of a low‐cost passive UHF‐RFID transponder

Engineering Reports, 2023
This paper presents a methodical design and prototyping of a passive European ultra‐high frequency (UHF) band radio frequency identification (RFID) transponder.
Benjamin Kommey, Ernest Ofosu Addo, Elvis Tamakloe   +2 more
doaj   +1 more source

Coaxial Dipole Array With Switching Transmit Sensitivities for Ultrahigh Field MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To investigate dipole antennas with electronically switchable transmit field patterns to improve flip angle homogeneity in ultra‐high field MRI. Methods Reconfigurable dipole elements that could produce two distinct electronically switchable B1+$$ {B}_1^{+} $$ field profiles were conceptualized and constructed. Eight such elements were
Dario Bosch, Georgiy A. Solomakha, Felix Glang, Martin Freudensprung, Nikolai Avdievich, Klaus Scheffler   +5 more
wiley   +1 more source

A design method of composite pixel-like antenna based on improved bald eagle search algorithm

Diance yu yibiao
The performance of ultra-high frequency (UHF) antennas is crucial to the detection effect of UHF sensors. UHF composite antennas integrate different fractal structures, striving to retain the advantages of multiple structures.
WANG Yongqiang, LIU Bingqi, ZHU Bolin
doaj   +1 more source

Calibration‐Free GRAPE pTx Pulses for Homogeneous Spatial‐Selective Excitation at 7T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Extend the universal pulse GRAPE formalism to pulses with a defined spectral response, and apply the concept to spatial selection. Methods We added Bloch simulations at several frequencies for each voxel to the pulse calculation to create universal spectrally‐selective GRAPE pulses.
Daniel Löwen, Eberhard D. Pracht, Marten Veldmann, Vincent Gras, Franck Mauconduit, Nicolas Boulant, Tony Stöcker   +6 more
wiley   +1 more source

Dusky grouse seasonal resource selection in the Great Basin isolated mountain ranges of Nevada, USA

Wildlife Biology, EarlyView.
Dusky grouse Dendragapus obscurus are a montane forest grouse species with a paucity of information regarding their temporal and spatial resource use during critical times of high mortality and reproductive output. This lack of vital data may leave dusky grouse at risk of sub‐optimal management in many areas of their distribution, especially in the ...
Stephanie Landry, Brian Smith, Erica Stuber, Shawn Espinosa, David Dahlgren   +4 more
wiley   +1 more source

HIGH PERFORMANCE UHF RFID TAG ANTENNAS ON LIQUID-FILLED BOTTLES

Progress In Electromagnetics Research, 2019
It is challenging to design a high-performance UHF RFID tag antenna on a liquid-filled bottle due to the high conductivity, high permittivity, and the variety of liquids.
Sailing He, Yiming Zhang, Laijun Li, Yuefeng Lu, Y. Zhang, Hui Liu   +5 more
semanticscholar   +1 more source

Development, function and test of a static test bench for UHF-RFID ear tags

Landtechnik, 2015
Ultra-high-frequency radio frequency identification systems (UHF-RFID systems) offer multiple application possibilities for animal identification. In a present joint project, UHF transponder ear tags and readers are currently being developed especially ...
Felix Adrion, Nora Hammer, Benjamin Rößler, Dagmar Jezierny, Anita Kapun, Eva Gallmann   +5 more
doaj   +1 more source

Analysing the Impact of Frequency Bands on Partial Discharge Measurement Outcomes in Generators Through Model‐Based Approach

High Voltage, EarlyView.
ABSTRACT The electromagnetic wave produced by a partial discharge (PD) covers a broad range of frequencies, from a few kHz to several 100 MHz. Because of the nonlinear response of the stator winding, each frequency component of the PD pulse experiences different levels of attenuation as it travels through the winding structure. Consequently, the choice
Arash Abyaz, Mohammad Hamed Samimi, Amir Abbas Shayegani Akmal   +2 more
wiley   +1 more source