Efficient evaluation of specific absorption rate (SAR) for MIMO terminals
(2014) In Electronics Letters 50(22). p.1561-1562- Abstract
- Multi-antenna enabled terminal devices are required to comply with the standards for limiting human exposure to electric fields. However, when compared to traditional single-antenna terminals, a comprehensive evaluation of specific absorption rate (SAR) for multi-antenna terminals is impractical. This is because both the power allocation and phase of the electric fields from different antennas are arbitrary in practical MIMO operation, hence requiring exhaustive evaluation over all possible cases. In this context, this paper first proposes time averaged simultaneous peak SAR (TASPS) as an efficient metric to evaluate exposure when more than one antenna is transmitting simultaneously. Then, it is analytically derived that TASPS will be... (More)
- Multi-antenna enabled terminal devices are required to comply with the standards for limiting human exposure to electric fields. However, when compared to traditional single-antenna terminals, a comprehensive evaluation of specific absorption rate (SAR) for multi-antenna terminals is impractical. This is because both the power allocation and phase of the electric fields from different antennas are arbitrary in practical MIMO operation, hence requiring exhaustive evaluation over all possible cases. In this context, this paper first proposes time averaged simultaneous peak SAR (TASPS) as an efficient metric to evaluate exposure when more than one antenna is transmitting simultaneously. Then, it is analytically derived that TASPS will be below a given exposure limit, as long as the stand-alone peak SAR for each antenna is smaller than that limit. Thus, SAR evaluation is greatly simplified since only stand-alone SAR needs to be measured. Several examples of dual-antenna mobile handsets are shown to illustrate and validate the analytical result. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4694466
- author
- Li, Hui LU and Lau, Buon Kiong LU
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Electronics Letters
- volume
- 50
- issue
- 22
- pages
- 1561 - 1562
- publisher
- IEE
- external identifiers
-
- wos:000344319700002
- scopus:84908124470
- ISSN
- 1350-911X
- DOI
- 10.1049/el.2014.2125
- project
- EIT_Optantsys Novel Antenna System Design Paradigm for High Performance Mobile Communications
- language
- English
- LU publication?
- yes
- id
- 419ea2e4-1bf1-498f-8bd9-19dac4ed5e76 (old id 4694466)
- date added to LUP
- 2016-04-01 13:23:46
- date last changed
- 2022-02-04 07:18:29
@article{419ea2e4-1bf1-498f-8bd9-19dac4ed5e76, abstract = {{Multi-antenna enabled terminal devices are required to comply with the standards for limiting human exposure to electric fields. However, when compared to traditional single-antenna terminals, a comprehensive evaluation of specific absorption rate (SAR) for multi-antenna terminals is impractical. This is because both the power allocation and phase of the electric fields from different antennas are arbitrary in practical MIMO operation, hence requiring exhaustive evaluation over all possible cases. In this context, this paper first proposes time averaged simultaneous peak SAR (TASPS) as an efficient metric to evaluate exposure when more than one antenna is transmitting simultaneously. Then, it is analytically derived that TASPS will be below a given exposure limit, as long as the stand-alone peak SAR for each antenna is smaller than that limit. Thus, SAR evaluation is greatly simplified since only stand-alone SAR needs to be measured. Several examples of dual-antenna mobile handsets are shown to illustrate and validate the analytical result.}}, author = {{Li, Hui and Lau, Buon Kiong}}, issn = {{1350-911X}}, language = {{eng}}, number = {{22}}, pages = {{1561--1562}}, publisher = {{IEE}}, series = {{Electronics Letters}}, title = {{Efficient evaluation of specific absorption rate (SAR) for MIMO terminals}}, url = {{https://lup.lub.lu.se/search/files/3341970/5205585.pdf}}, doi = {{10.1049/el.2014.2125}}, volume = {{50}}, year = {{2014}}, }