Faster Determination of Mass-Averaged SAR From 2-D Area Scans

Kanda, M.; Douglas, Mark; Mendivil, E.D.; Ballen, M.; Gessner, A.V.; Chou, Chung‐Kwang

doi:10.1109/tmtt.2004.832026

Cited by 41 publications

(13 citation statements)

References 6 publications

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“…The SAR at an arbitrary point can be simply expressed by Eq. (4) if the characteristics of the incident wave behave like an attenuating planar wave [9].…”

Section: Concept Of Sarmentioning

confidence: 99%

Measurement Data Comparison of Fast SAR Measurement System by Probe Arrays with Robot Scanning SAR Measurement System

Kim¹,

Gimm²

2014

Journal of electromagnetic engineering and science

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Dosimetry of radiating electromagnetic wave from mobile devices to human body has been evaluated by measuring Specific Absorption Rate (SAR). Usual SAR measurement system scans the volume by robot arm to evaluate RF power absorption to human body from wireless devices. It is possible to fast estimate the volume SAR by software deleting robot moving time with the 2D surface SAR data acquired by arrayed probes. This paper shows the principle of fast SAR measurement and the measured data comparison between the fast SAR system and the robot scanning system. Data of the fast SAR is well corresponding with data of robot scanning SAR within ±3 dB, and its dynamic range covers from 10 mW/kg to 30 W/kg with 4.8 mm probe diameter.Key Words: 2D Array, E-Field Probe, Fast SAR, Human Safety, Radio Frequency. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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“…The SAR at an arbitrary point can be simply expressed by Eq. (4) if the characteristics of the incident wave behave like an attenuating planar wave [9].…”

Section: Concept Of Sarmentioning

confidence: 99%

Measurement Data Comparison of Fast SAR Measurement System by Probe Arrays with Robot Scanning SAR Measurement System

Kim¹,

Gimm²

2014

Journal of electromagnetic engineering and science

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“…Mike Kanda and Maurice Ballen were the main contributors. Because of the long SAR measurement time required to do threedimensional scans for mobile phone compliance testing, Dr. Mark Douglas and Mike Kanda developed a two-dimensional scanning method which is 70% faster and shown to be accurate enough for preliminary testing [Kanda et al, 2004b]. This method has been implemented in a commercial system known as MOTO-SCAN.…”

Section: Dosimetrymentioning

confidence: 99%

Thirty‐five years in bioelectromagnetics research

2006

Bioelectromagnetics

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For 35 years, I have been involved in various bioelectromagnetics research projects including acute and long-term radiofrequency (RF) bioeffects studies, dosimetry, exposure systems, MRI safety, cancer studies involving hyperthermia and electrochemical treatment, development of RF exposure and measurement standards, and product compliance. My first study demonstrated that effects on isolated nerve and muscle preparations were due to thermal effects of RF exposure. The recording of cochlear microphonics in animals shows the mechanical nature of the microwave auditory effect. In 1992, we published the results of a large-scale lifetime study in which 100 rats were sham-exposed and 100 rats were exposed for 21 h/day for 25 months to a pulsed RF signal. In dosimetry studies, human models were employed as well as many animal species including mice, rats, rabbits, monkeys, and birds of many sizes. Cancer hyperthermia studies demonstrated that knowledge of temperature distribution was crucial for successful treatment. Research on electrochemical treatment of tumors with direct current involved cellular, animal, and clinical studies. Over the past few decades, there has been rather extensive investigation of the public health impact of RF exposure. In my opinion, future research in bioelectromagnetics should place greater emphasis on medical applications.

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“…An algorithm was previously published by the authors [8]. The algorithm requires only the measurement of the area scan and knowledge of the penetration depth.…”

Section: Introductionmentioning

confidence: 99%

A Robust Algorithm for Faster SAR Measurement in the 30-6000 MHz Frequency Range

Douglas

Gessner

Chou

2008

2008 2nd International Conference on Bioinformatics and Biomedical Engineering

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An algorithm to quickly estimate the measured specific absorption rate (SAR) from planar scans is presented. This algorithm results in a savings in measurement time of up to 70%. Previously published work from the authors has been extended here to cover the entire frequency range of 30 MHz -6 GHz specified in draft international standards. SAR data have been collected on real cellular phones to demonstrate that the previous algorithm is accurate. Numerical electromagnetic simulations were conducted in order to extend the frequency range of the algorithm. It is shown that the new algorithm gives similar results to the previous algorithm in the 150 -2450 MHz frequency range, but it performs much better in the extended frequency range.

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Faster Determination of Mass-Averaged SAR From 2-D Area Scans

Cited by 41 publications

References 6 publications

Measurement Data Comparison of Fast SAR Measurement System by Probe Arrays with Robot Scanning SAR Measurement System

Measurement Data Comparison of Fast SAR Measurement System by Probe Arrays with Robot Scanning SAR Measurement System

Thirty‐five years in bioelectromagnetics research

A Robust Algorithm for Faster SAR Measurement in the 30-6000 MHz Frequency Range

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