Results 151 to 160 of about 13,780,098 (199)

Conductivity and frequency dependent specific absorption rate

Journal of Applied Physics, 2013
Recently, a number of contradicting results have been reported regarding the electromagnetic (EM) energy absorption by highly conductive materials in a liquid phase. The argument rises from the fact that higher conductive media absorb more electromagnetic energy; this however would be constrained by the localized field values that are dictated by the ...
Xiaoming Liu, Hui-Jiuan Chen, Yasir Alfadhl, Xiaodong Chen, Clive Parini, Dongsheng Wen   +5 more
openaire   +1 more source

Novel Specific Absorption Rate measurement techniques

2008 Asia-Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008
This paper presents two specific absorption rate (SAR) measurement techniques, the electro-optic (EO) probe and a SAR estimation method. A prototype of the three-axis EO probe is developed for SAR measurement. The probe is capable of measuring both the amplitude and phase of an electric field (E-field) at multiple frequencies simultaneously. Evaluation
Teruo Onishi, Katsuki Kiminami, Takahiro Iyama   +2 more
openaire   +1 more source

Specific absorption rate investigation on multiple antennas

2017 International Symposium on Antennas and Propagation (ISAP), 2017
Dealing with multiple antennas in various wireless devices has raised a distress of health effect. Thus, the investigation towards the relations between the electromagnetic field (EMF) radiation and human health is significant to be discovered. Hence, this paper presents the specific absorption rate (SAR) investigation on a single and 1 × 2 array of ...
Nur Ilham Aliyaa Ishak, Norhudah Seman, Muhammad Ramlee Kamarudin, Noor Asmawati Samsuri   +3 more
openaire   +1 more source

Influence of the Hand on the Specific Absorption Rate in the Head

IEEE Transactions on Antennas and Propagation, 2012
The influence of the user's hand holding a mobile phone to the ear on the peak spatial-average Specific Absorption Rate (psSAR) averaged over any 1 g and 10 g of tissue in the head is investigated. This study is motivated by recent reports that found substantial increases in psSAR by the presence of the hand in some cases. Current measurement standards
Chung-Huan Li, Mark Douglas, Erdem Ofli, Benoit Derat, Sami Gabriel, Nicolas Chavannes, Niels Kuster   +6 more
openaire   +1 more source

A specific absorption rate prediction concept for parallel transmission MR

Magnetic Resonance in Medicine, 2012
AbstractThe specific absorption rate (SAR) is a limiting factor in high‐field MR. SAR estimation is typically performed by numerical simulations using generic human body models. However, SAR concepts for single‐channel radiofrequency transmission cannot be directly applied to multichannel systems. In this study, a novel and comprehensive SAR prediction
Ingmar, Graesslin, Hanno, Homann, Sven, Biederer, Peter, Börnert, Kay, Nehrke, Peter, Vernickel, Giel, Mens, Paul, Harvey, Ulrich, Katscher   +8 more
openaire   +2 more sources

Incorporating specific absorption rate constraints into wireless signal design

IEEE Communications Magazine, 2014
Portable wireless devices used in close proximity to the human body have transmitter power constraints that are dictated in part by regulatory limits on a form of electromagnetic exposure called specific absorption rate (SAR). SAR, measured in Watts per kilogram, is a measure of electromagnetic energy absorption by the body, which can cause the heating
Bertrand M. Hochwald, David James Love, Su Yan 0002, Patrick Fay, Jianming Jin   +4 more
openaire   +1 more source

Specific Absorption Rate Analysis of Smartphone

2022 22nd International Symposium on Electrical Apparatus and Technologies (SIELA), 2022
Magdalena Garvanova, Ivan Garvanov, Daniela Borissova   +2 more
openaire   +1 more source

The effects of head parameters on the specific absorption rate in the human head

2015 8th International Conference on Biomedical Engineering and Informatics (BMEI), 2015
The human head model is constructed with the help of the High Frequency Structure Simulator (HFSS) software in this paper. The distributions of the specific absorption rate (SAR) in the human head are studied, and then, the influence of the head model dimensions and electrical parameters are discussed.
Changqi Zhu, Dongsheng Wu, Lanlan Ping, Wenli Liang   +3 more
openaire   +2 more sources

Propagation Models Approach for the Study of Human Specific Absorption Rate

2019 11th International Conference on Electronics, Computers and Artificial Intelligence (ECAI), 2019
We are exposed to several sources of radiation that are harmful. The absorbed dose is calculated by different methods. We apply the one based on the electric field, the conductivity of human tissues and its density. Ibn Tofail University is surrounded by several base stations, the objective of our paper is to estimate the SAR at our university by ...
Loubna El Amrani, Tomader Mazri, Nabil Hmina   +2 more
openaire   +2 more sources

Comparison Measurement for Specific Absorption Rate With Physically Different Procedure

IEEE Transactions on Instrumentation and Measurement, 2012
The specific absorption rate (SAR) is an indicator of the thermal effects caused by microwave exposure in biological tissue. Conventionally, an electric field probe scanning method is used for SAR evaluation. Although many countries have confirmed the validity of the electric field probe scanning method used in many SAR evaluation devices, a comparison
Yoshinobu Okano, Hironobu Shimoji
openaire   +2 more sources