A High-Order Model for Fast Estimation of Electromagnetic Absorption Induced by Multiple Transmitters in Portable Devices

Jian Li, Su Yan, Yanan Liu, Bertrand M. Hochwald, Jian Ming Jin

Research output: Contribution to journalArticle

Abstract

In the development of 5G communication systems, multiantenna transmitting architectures and millimeter-wave operating frequency bands are effective ways to improve the communication data rate. In order to estimate the electromagnetic exposure under multiantenna transmitters installed in portable devices working in long-term evolution (LTE) and millimeter-wave bands, this paper generalizes a low-order model to higher orders based on the Fourier series expansion for a fast and accurate evaluation and prediction of electromagnetic absorption (EA) as a function of the phase difference among multiple transmitters. Several numerical and experimental examples are given to demonstrate the effectiveness of the proposed high-order model in multiple LTE, 5G, and millimeter-wave communication bands. With the excellent capability of calculating and predicting EA with a low error, this high-order model can be used to improve the bio-electromagnetic performances of multiantenna portable devices when combined with other communication technologies.

Original languageEnglish (US)
Article number7982805
Pages (from-to)6768-6778
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Volume65
Issue number12
DOIs
StatePublished - Dec 2017

Keywords

  • 5G communication
  • electromagnetic absorption (EA)
  • high-order model
  • millimeter-wave communication
  • multiantenna transmitter
  • portable devices
  • power loss density (PLD)
  • specific absorption rate (SAR)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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