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| Content Provider | IET Digital Library |
|---|---|
| Author | Li, H. Lau, B. K. |
| Abstract | Multi-antenna-enabled terminal devices are required to comply with the standards for limiting human exposure to electric fields. However, when compared to the 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 the phase of the electric fields from different antennas are arbitrary in practical multiple-input–multiple-output (MIMO) operation, hence requiring exhaustive evaluation over all possible cases. In this context, first, the time-averaged simultaneous peak SAR (TASPS) is proposed as an efficient metric to evaluate the 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 the stand-alone SAR needs to be measured. Several examples of dual-antenna mobile handsets are shown to illustrate and validate the analytical result. |
| Starting Page | 1561 |
| Ending Page | 1562 |
| Page Count | 2 |
| ISSN | 00135194 |
| Volume Number | 50 |
| e-ISSN | 1350911X |
| Issue Number | Issue 22, Oct (2014) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/50/22 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2014.2125 |
| Journal | Electronics Letters |
| Publisher Date | 2014-10-17 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Antenna Array Dual-antenna Mobile Handsets Electric Field Electromagnetic Wave Absorption Electromagnetic Wave Propagation MIMO Communication MIMO Terminals Mobile Antenna Multiantenna-enabled Terminal Device Multiple-input-multiple-output Operation Power Allocation Radio Link And Equipment Single-antenna Terminals Specific Absorption Rate TASPS Time-averaged Simultaneous Peak SAR Transmitting Antenna |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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