scholarly journals Computation of Transient Near-Field Radiated by Electronic Devices from Frequency Data

10.5772/36717 ◽  
2012 ◽  
Author(s):  
Blaise Ravelo ◽  
Yang Liu
Keyword(s):  
Near Field ◽  
Electronic Devices ◽  
Frequency Data

Near field resonant inductive coupling to power electronic devices dispersed in water

2012 ◽  
Vol 178 ◽  
pp. 217-222 ◽  
Author(s):  
Johannes Kuipers ◽  
Harry Bruning ◽  
Simon Bakker ◽  
Huub Rijnaarts
Keyword(s):  
Near Field ◽  
Electronic Devices ◽  
Inductive Coupling ◽  
Power Electronic

Measurement and visualization of the radiation patterns of portable electronic devices design of a near field scanner and first measurements

2008 ◽  
Author(s):  
Oliver Doring ◽  
Bjorn Rohrsen ◽  
Sven Battermann ◽  
Heyno Garbe ◽  
Thiemo Stadtler ◽  
...  
Keyword(s):  
Near Field ◽  
Electronic Devices ◽  
Radiation Patterns

scholarly journals Accurate Hotspot Localization by Sampling the Near-Field Pattern of Electronic Devices

2013 ◽  
Vol 55 (6) ◽  
pp. 1365-1368 ◽  
Author(s):  
Prashant Singh ◽  
Dirk Deschrijver ◽  
Davy Pissoort ◽  
Tom Dhaene
Keyword(s):  
Near Field ◽  
Electronic Devices ◽  
Field Pattern

A Review of Methods and Challenges for Improvement in Efficiency and Distance for Wireless Power Transfer Applications

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Sokol Kuka ◽  
Kai Ni ◽  
Mohammed Alkahtani
Keyword(s):  
Electric Vehicles ◽  
Power Efficiency ◽  
Near Field ◽  
Electronic Devices ◽  
Wireless Power Transfer ◽  
Power Transfer ◽  
Wireless Power ◽  
Inductive Power Transfer ◽  
The Past ◽  
Transmission Distance

AbstractOver the past few years, interest and research in wireless power transfer (WPT) have been rapidly incrementing, and as an effect, this is a remarkable technology in many electronic devices, electric vehicles and medical devices. However, most of the applications have been limited to very close distances because of efficiency concerns. Even though the inductive power transfer technique is becoming relatively mature, it has not shown near-field results more than a few metres away transmission. This review is focused on two fundamental aspects: the power efficiency and the transmission distance in WPT systems. Introducing the principles and the boundaries, scientific articles will be reviewed and discussed in terms of their methods and respective challenges. This paper also shows more important results in efficiency and distance obtained, clearly explaining the theory behind and obstacles to overcome. Furthermore, an overlook in other aspects and the latest research studies for this technology will be given. Moreover, new issues have been raised including safety and security.

ESTIMATION OF THE DEGREE OF CYCLOSTATIONARITY OF UNINTENTIONAL RADIATION CAUSED BY DIGITAL ELECTRONIC DEVICES

2020 ◽  
Author(s):  
М.С. НУЖНОВ ◽  
Ю.В. КУЗНЕЦОВ ◽  
А.Б. БАЕВ ◽  
М.А. КОНОВАЛЮК
Keyword(s):  
Theoretical Analysis ◽  
Electromagnetic Radiation ◽  
Autocorrelation Function ◽  
Experimental Research ◽  
Near Field ◽  
Electronic Devices ◽  
Measured Signal ◽  
Two Dimensional ◽  
Spatial Characteristics ◽  
Methods Of Analysis

Рассмотрены методы анализа пространственных характеристик непреднамеренных электромагнитных излучений, измеренных в ближней зоне средств вычислительной техники. Развитием подхода к обнаружению случайных процессов является алгоритм, основанный на оценке степени циклостационарности с использованием двумерной автокорреляционной функции измеренного сигнала. В работе проведены теоретический анализ свойств степени циклостационарности и экспериментальные исследования по обнаружению источников непреднамеренных излучений электронных устройств. Methods of analysis of spatial characteristics of unintentional electromagnetic radiation measured in the near-field of the electronic devices are considered. An improved algorithm for detecting such electromagnetic radiation is proposed. It is based on the estimation of the degree of cyclostationarity using the two-dimensional autocorrelation function of the measured signal. Theoretical analysis of the properties of the degree of cyclostationarity is performed. Experimental research on the detection of sources of unintentional radiation of electronic devices is presented.

Evaluation of PCB Shielding Characteristic in Near Field

2017 ◽  
Vol 5 (3) ◽  
pp. 542
Author(s):  
Yih Jian Chuah ◽  
Mohd Tafir Mustaffa
Keyword(s):  
Electromagnetic Interference ◽  
High Frequency ◽  
Near Field ◽  
Electronic Devices ◽  
The Other ◽  
Shielding Effectiveness ◽  
Electronic Industry ◽  
Common Solution ◽  
The Common ◽  
Simulation Results

Wireless electronic devices nowadays always operate in high frequency while having small and compact form factor which led to electromagnetic interference among traces and components. PCB shielding is the common solution applied in electronic industry to mitigate electromagnetic interference. In this paper, PCB shielding characteristics such as shield’s thickness, height, and ground via spacing in PCB boards were evaluated in near field. Test boards with various ground via spacing were fabricated and evaluated by using 3D Electromagnetic scanner. On the other hand, shields with various thickness and height were modeled and evaluated through simulation. Results suggested that shielding effectiveness could be improved by having greater shield’s height with smaller ground via spacing in shielding ground tracks. Shielding effectiveness can be improved by 1 dB with every step of 0.5 mm increase in shield’s height. Besides that, approximately 0.5 dB improvement in shielding effectiveness with every step of 1 mm decrease in ground via spacing. Furthermore, greater shield’s thickness can contribute better shielding effectiveness for operating frequency below 300 MHz.

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