Results 11 to 20 of about 31,794 (223)

IoT-Linked Integrated NFC and Dual Band UHF/2.45 GHz RFID Reader Antenna Scheme

IEEE Access, 2019
This research proposes a system board of integrated antenna scheme of near-field communication (NFC) and dual band ultra-high frequency (UHF, 920-925 MHz)/2.45 GHz radio frequency identification (RFID) reader antennas for Internet of Things (IoT ...
Adisak Romputtal, Chuwong Phongcharoenpanich   +1 more
doaj   +3 more sources

Dual-Band RFID Tag Antenna Based on the Hilbert-Curve Fractal for HF and UHF Applications [PDF]

IET Circuits, Devices and Systems, 2016
A novel single-radiator card-type tag is proposed which is constructed using a series Hilbert-curve loop and matched stub for high frequency (HF)/ultra high frequency (UHF) dual-band radio frequency identification (RFID) positioning applications.
Alibakhshikenari, Mohammad, Limiti, Ernesto, Naser-Moghadasi, Mohammad, Sadeghzadeh, Ramazan Ali, Virdee, Bal Singh   +4 more
core   +3 more sources

Dual-band HF-UHF RFID tag antenna

Electronics Letters, 2009
A dual-band HF and UHF RFID tag antenna with two feeding points is presented, fabricated and measured. A convenient HF resonance is obtained with an HF ASIC chip as well as good impedance matching with UHF ASIC chip in the European RFID UHF band. Tuning techniques of the design parameters are proposed, and tag performance in both frequency bands is ...
Iliev, P., Le Thuc, Philippe, Staraj, Robert, Luxey, Cyril   +3 more
openaire   +3 more sources

Design and Fabrication of Plasma Array Antenna with Beam Forming [PDF]

Journal of Electrical and Computer Engineering Innovations, 2017
In this paper, the design and implementation of plasma antenna array with beam forming is discussed. The structure consists of a circular array of plasma tube enclosed in a unipolar UHF band monopole antenna. Beam forming is possible by stimulated plasma
F.S. Mohseni Armaki, S.A. Mohseni Armaki
doaj   +1 more source

High-Resolution Diffusion-Weighted Imaging With Self-Gated Self-Supervised Unrolled Reconstruction. [PDF]

Magn Reson Med
ABSTRACT Purpose High‐resolution diffusion‐weighted imaging (DWI) is clinically demanding. The purpose of this work is to develop an efficient self‐supervised algorithm unrolling technique for submillimeter‐resolution DWI. Methods We developed submillimeter DWI acquisition utilizing multi‐band multi‐shot EPI with diffusion shift encoding.
Tan Z, Liebig PA, Hofmann A, Laun FB, Knoll F.   +4 more
europepmc   +2 more sources

Testbed for Sub-Nyquist Wideband Spectrum Monitoring

Revista Ingenierías Universidad de Medellín, 2020
Radioelectric spectrum management is a concern for today’s world, mainly due to the misuse that has been given to this resource through the years, especially on the UHF band.
Juan Felipe Medina Lee, Alexander López-Parrado, Alexander Vera Tasamá, Duvier de Jesús Bohórquez Palacio   +3 more
doaj   +1 more source

UHF Band Short Range Propagation Model [PDF]

Wireless Personal Communications, 2013
The purpose of this study is to characterize the indoor and indoor–outdoor propagation in different scenarios, using monopole antennas working at 410 and 890 MHz. Propagation of narrow band and wide bands have been studied. In scenarios with a continuous variation of the distance between the transmitter and receiver antenna (1 D scenarios), we use a ...
openaire   +2 more sources

First In Vivo ²³Na Human Imaging at 10.5 T Using a Combined Sodium-Proton Transceiver Body Array. [PDF]

Magn Reson Med
ABSTRACT Purpose To demonstrate the first in vivo human 23Na MRI at 10.5 T using a novel dual‐tuned transceiver body array and to evaluate a self‐gating approach for respiratory motion compensation, focusing on renal imaging. Methods A custom‐built eight‐channel 23Na‐loop 1H‐dipole transceiver array was designed, constructed, and characterized.
Schmidt S, Ertürk AM, Metzger GJ.
europepmc   +2 more sources

Wideband UHF Antenna for Partial Discharge Detection

Applied Sciences, 2020
This paper presents a ultra-high frequency (UHF) antenna for partial discharge (PD) detection and the antenna sensor can be used near a conducting ground wire.
Zhen Cui, Seungyong Park, Hosung Choo, Kyung-Young Jung   +3 more
doaj   +1 more source

A Compact Dual-Band RFID Tag Antenna Mountable on Metallic Objects

International Journal of Antennas and Propagation, 2015
A compact (50 × 50 × 4 mm3) dual-band radio frequency identification (RFID) tag antenna mountable on metallic objects is proposed for the ultra-high frequency (UHF) band (917∼923.5 MHz) and the microwave (MW) band (2.4∼2.45 GHz).
Byeonggwi Mun, Yonghyun Yoon, Hyunwoo Lee, Hark-Yong Lee, Byungje Lee   +4 more
doaj   +1 more source