New Numerical Target SAR Values and an Optimized Flat Phantom for SAR Validation Tests in the 150MHz Band

Dong-Geun CHOI; Ki-Hwea KIM; Jaehoon CHOI

doi:10.1587/transcom.E98.B.1323

New Numerical Target SAR Values and an Optimized Flat Phantom for SAR Validation Tests in the 150MHz Band

Dong-Geun CHOI, Ki-Hwea KIM, Jaehoon CHOI

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New target specific absorption rate (SAR) values, calculated using a proposed reference dipole antenna and the reference flat phantom, are presented for an SAR validation test at 150MHz. The reference flat phantom recommended by the International Electrotechnical Commission (IEC) standard for 150MHz requires a significant amount of liquid owing to its large size. We conduct a numerical analysis in order to reduce the size of the flat phantom. The optimum size of the flat phantom is 780 (L₁) × 540 (W) × 200 (H)mm³, which is approximately a 64% reduction in volume compared to the reference flat phantom. The length of the reference dipole antenna required for the optimized flat phantom (extrapolated from the reference values at 300MHz) becomes 760mm. The calculated and measured return losses (S₁₁) of the antenna at 150MHz are 24.1dB and 22dB, respectively. The calculated and measured results for the return loss of the dipole antenna agree well and satisfy the IEC standard (> 20dB). The target SAR values derived from the numerical analysis are 1.08W/kg for 1g of tissue and 0.77W/kg for 10g of tissue for an SAR validation test at 150MHz.

Publication: IEICE TRANSACTIONS on Communications Vol.E98-B No.7 pp.1323-1332

Publication Date: 2015/07/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E98.B.1323

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Dong-Geun CHOI
  National Radio Research Agency
Ki-Hwea KIM
  National Radio Research Agency
Jaehoon CHOI
  Hanyang University

Keyword

SAR measurement, validation test, reference dipole antenna, flat phantom, target SAR value

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Dong-Geun CHOI, Ki-Hwea KIM, Jaehoon CHOI, "New Numerical Target SAR Values and an Optimized Flat Phantom for SAR Validation Tests in the 150MHz Band" in IEICE TRANSACTIONS on Communications, vol. E98-B, no. 7, pp. 1323-1332, July 2015, doi: 10.1587/transcom.E98.B.1323.
Abstract: New target specific absorption rate (SAR) values, calculated using a proposed reference dipole antenna and the reference flat phantom, are presented for an SAR validation test at 150MHz. The reference flat phantom recommended by the International Electrotechnical Commission (IEC) standard for 150MHz requires a significant amount of liquid owing to its large size. We conduct a numerical analysis in order to reduce the size of the flat phantom. The optimum size of the flat phantom is 780 (L₁) × 540 (W) × 200 (H)mm³, which is approximately a 64% reduction in volume compared to the reference flat phantom. The length of the reference dipole antenna required for the optimized flat phantom (extrapolated from the reference values at 300MHz) becomes 760mm. The calculated and measured return losses (S₁₁) of the antenna at 150MHz are 24.1dB and 22dB, respectively. The calculated and measured results for the return loss of the dipole antenna agree well and satisfy the IEC standard (> 20dB). The target SAR values derived from the numerical analysis are 1.08W/kg for 1g of tissue and 0.77W/kg for 10g of tissue for an SAR validation test at 150MHz.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E98.B.1323/_p

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@ARTICLE{e98-b_7_1323,
author={Dong-Geun CHOI, Ki-Hwea KIM, Jaehoon CHOI, },
journal={IEICE TRANSACTIONS on Communications},
title={New Numerical Target SAR Values and an Optimized Flat Phantom for SAR Validation Tests in the 150MHz Band},
year={2015},
volume={E98-B},
number={7},
pages={1323-1332},
abstract={New target specific absorption rate (SAR) values, calculated using a proposed reference dipole antenna and the reference flat phantom, are presented for an SAR validation test at 150MHz. The reference flat phantom recommended by the International Electrotechnical Commission (IEC) standard for 150MHz requires a significant amount of liquid owing to its large size. We conduct a numerical analysis in order to reduce the size of the flat phantom. The optimum size of the flat phantom is 780 (L₁) × 540 (W) × 200 (H)mm³, which is approximately a 64% reduction in volume compared to the reference flat phantom. The length of the reference dipole antenna required for the optimized flat phantom (extrapolated from the reference values at 300MHz) becomes 760mm. The calculated and measured return losses (S₁₁) of the antenna at 150MHz are 24.1dB and 22dB, respectively. The calculated and measured results for the return loss of the dipole antenna agree well and satisfy the IEC standard (> 20dB). The target SAR values derived from the numerical analysis are 1.08W/kg for 1g of tissue and 0.77W/kg for 10g of tissue for an SAR validation test at 150MHz.},
keywords={},
doi={10.1587/transcom.E98.B.1323},
ISSN={1745-1345},
month={July},}

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TY - JOUR
TI - New Numerical Target SAR Values and an Optimized Flat Phantom for SAR Validation Tests in the 150MHz Band
T2 - IEICE TRANSACTIONS on Communications
SP - 1323
EP - 1332
AU - Dong-Geun CHOI
AU - Ki-Hwea KIM
AU - Jaehoon CHOI
PY - 2015
DO - 10.1587/transcom.E98.B.1323
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E98-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2015
AB - New target specific absorption rate (SAR) values, calculated using a proposed reference dipole antenna and the reference flat phantom, are presented for an SAR validation test at 150MHz. The reference flat phantom recommended by the International Electrotechnical Commission (IEC) standard for 150MHz requires a significant amount of liquid owing to its large size. We conduct a numerical analysis in order to reduce the size of the flat phantom. The optimum size of the flat phantom is 780 (L₁) × 540 (W) × 200 (H)mm³, which is approximately a 64% reduction in volume compared to the reference flat phantom. The length of the reference dipole antenna required for the optimized flat phantom (extrapolated from the reference values at 300MHz) becomes 760mm. The calculated and measured return losses (S₁₁) of the antenna at 150MHz are 24.1dB and 22dB, respectively. The calculated and measured results for the return loss of the dipole antenna agree well and satisfy the IEC standard (> 20dB). The target SAR values derived from the numerical analysis are 1.08W/kg for 1g of tissue and 0.77W/kg for 10g of tissue for an SAR validation test at 150MHz.
ER -