Results 41 to 50 of about 11,336 (176)

An Active VHF and UHF Electrically Small Horn Antenna Using Non-Foster Matching Circuit [PDF]

Iranian Journal of Electrical and Electronic Engineering, 2023
In this article, an active electrically small Horn antenna for very high frequency (VHF) and ultra-high frequency (UHF) frequencies is presented. The proposed horn antenna has a height of 5 cm and a diameter of 4.28 cm which can cover 6-12 GHz without a ...
Atefeh Sohrabi, hamideh dashti, Javad Ahmadi-shokouh   +2 more
doaj  

HopScotch - a low-power renewable energy base station network for rural broadband access [PDF]

, 2012
The provision of adequate broadband access to communities in sparsely populated rural areas has in the past been severely restricted. In this paper, we present a wireless broadband access test bed running in the Scottish Highlands and Islands which is ...
A Farbod, A Payne, Anthony McMahon, AR Tharek, B Lennett, B Panajotovic, B Raman, C Comaniciu, Colin McGuire, D Borth, D Grace, D Wu, D Žagar, David H Crawford, Faisal Darbari, G Bernardi, Gregour Bolton, I Krikidis, J He, J Mosenthal, J Palicot, J Riding, KL Chee, L Vishloff, M Brew, M Manshaei, M Zhang, Malcolm R Brew, N Michael, P Bhagwat, P Chitamu, R Mangharam, R Min, R Wolff, Robert W Stewart, S Hashimoto, S Saunders, S Srikanteswara, Stephan Weiss, T Chen, T Todd, W Gerok, WC Lee, X Chen, YC Liang   +44 more
core   +1 more source

PD Flexible Built-In High-Sensitivity Elliptical Monopole Antenna Sensor

Sensors, 2022
In view of the insufficient signal detection sensitivity of Gas Insulated Switchgear (GIS), partial discharge (PD), ultra-high frequency (UHF), and failure to conform with GIS surface structure when the existing rigid stereo structure UHF sensor is built
Hanting Zhang, Guozhi Zhang, Xiaoxing Zhang, Hanlu Tian, Changyue Lu, Jianben Liu, Yin Zhang   +6 more
doaj   +1 more source

Lower Ultra-High Frequency Non-Deployable Omnidirectional Antenna for Nanosatellite Communication System

Nanomaterials, 2022
The concept of the nanosatellite comes into play in launching miniaturized versions of satellites or regarding payloads with minimizing cost and building time.
Touhidul Alam, Muntasir M. Sheikh, Rabah W. Aldhaheri, Mandeep Singh Jit Singh, Mengu Cho, Mohammad Tariqul Islam, Khalid H. Alharbi, Md. Shabiul Islam   +7 more
doaj   +1 more source

Radio Frequency Identification Technology: Applications, Technical Challenges and Strategies [PDF]

, 2006
Purpose - The purpose of this paper is to discuss the technology behind RFID systems, identify the applications of RFID in various industries, and discuss the technical challenges of RFID implementation and the corresponding strategies to overcome those ...
Khumawala, Basheer M, Li, Suhong, Visich, John K., Zhang, Chen   +3 more
core   +2 more sources

A Hybrid RF Coil for Whole‐Brain Imaging in Non‐Human Primates at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Ultra‐high field MRI (≥ 7 T) offers unprecedented potential for mapping non‐human primate (NHP) brain function. However, complex electromagnetic systems are required to meet the challenges of UHF imaging and the mechanical demands of awake NHP studies.
Elias Djaballah, Éric Giacomini, Paul‐François Gapais, Michel Luong, Alexis Amadon, Qi Zhu   +5 more
wiley   +1 more source

Octafilar Helical Antenna for Portable UHF-RFID Reader

International Journal of Engineering Business Management, 2012
Octafilar helical antenna (OFHA) is proposed for handheld ultra-high-frequency (UHF) radio frequency identification (RFID) reader. The investigated antenna configuration consists of OFHA placed on reader device in the presence of human hand model.
Saber H. Zainud-Deen, Hend A. Malhat, Kamal H. Awadalla   +2 more
doaj   +1 more source

On-body antenna wit parasitic elements [PDF]

, 2008
An antenna with multi-elements that act together to form an array is required to increase the gain. One example is the well-known Yagi-Uda antenna.
Hall, Peter S., Kamarudin, Muhammad Ramlee   +1 more
core  

Signal Extraction and Clustering of Partial Discharge in Motor Insulation Using Temporal Correlation‐Based Clustering

High Voltage, EarlyView.
ABSTRACT As one of the important links in energy transition and global energy interconnection, electric vehicles (EVs) are becoming increasingly major research topics in the field of energy. Partial discharge (PD) identification under repetitive impulsive voltages plays a pivotal role in evaluating the health of electric vehicle (EV) motor insulation ...
Li Wang, Jia‐Wei Zhang, Haikun Shang, Yu Zhao, Yufei Wang, Chen Song, Jianwei Zhang, Fouad Belhora   +7 more
wiley   +1 more source

Design and implementation of ultra high frequency 921 MHz reader antenna for indoor propagation / Syamimi Mohd Norzeli [PDF]

, 2018
In recent years, Radio Frequency Identification (RFID) technology is highly demanded in various applications, requiring a rapid development in the RFID technology.
Mohd Norzeli, Syamimi
core