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On user effects in MIMO handset antennas designed using characteristic modes

Vasilev, Ivaylo LU and Lau, Buon Kiong LU (2016) In IEEE Antennas and Wireless Propagation Letters 15. p.758-761
Abstract
The Theory of Characteristic Modes (TCM) has been applied to design high-performance MIMO antennas for mobile terminals. However, existing studies focus on free-space (FS) performance, which is mostly irrelevant in real usage. This paper investigates the performances of two TCM-based MIMO terminal antenna designs in 7 realistic user scenarios for frequencies below 1 GHz. Full-wave simulation results indicate that the TCM designs can significantly outperform conventional designs in user scenarios that require good MIMO performance. Higher multiplexing efficiency (ME), by up to 3 dB, was recorded for a TCM design relative to a conventional terminal in a two-hand scenario. Performance advantages of the TCM designs were mainly due to lower... (More)
The Theory of Characteristic Modes (TCM) has been applied to design high-performance MIMO antennas for mobile terminals. However, existing studies focus on free-space (FS) performance, which is mostly irrelevant in real usage. This paper investigates the performances of two TCM-based MIMO terminal antenna designs in 7 realistic user scenarios for frequencies below 1 GHz. Full-wave simulation results indicate that the TCM designs can significantly outperform conventional designs in user scenarios that require good MIMO performance. Higher multiplexing efficiency (ME), by up to 3 dB, was recorded for a TCM design relative to a conventional terminal in a two-hand scenario. Performance advantages of the TCM designs were mainly due to lower correlation as well as higher impedance matching and coupling efficiency. Moreover, a combined usage study based on weighted ME over different user cases established that on average TCM designs outperform conventional designs by up to 1.6 dB. This suggests that the TCM designs not only give superior performance in FS, but also in realistic user scenarios. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
impedance matching and mutual coupling, mobile antennas, MIMO systems
in
IEEE Antennas and Wireless Propagation Letters
volume
15
pages
758 - 761
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:84964324774
ISSN
1548-5757
project
EIT_ANTCHN Antenna-Channel Harmonization for Throughput Enhancement in Advanced Mobile Terminals
EIT_Optantsys Novel Antenna System Design Paradigm for High Performance Mobile Communications
language
English
LU publication?
yes
id
9e5e885c-7cf4-4595-9df5-509cfe6cac5e (old id 7765611)
alternative location
http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7219365
date added to LUP
2015-08-21 14:21:04
date last changed
2017-10-22 04:54:20
@article{9e5e885c-7cf4-4595-9df5-509cfe6cac5e,
  abstract     = {The Theory of Characteristic Modes (TCM) has been applied to design high-performance MIMO antennas for mobile terminals. However, existing studies focus on free-space (FS) performance, which is mostly irrelevant in real usage. This paper investigates the performances of two TCM-based MIMO terminal antenna designs in 7 realistic user scenarios for frequencies below 1 GHz. Full-wave simulation results indicate that the TCM designs can significantly outperform conventional designs in user scenarios that require good MIMO performance. Higher multiplexing efficiency (ME), by up to 3 dB, was recorded for a TCM design relative to a conventional terminal in a two-hand scenario. Performance advantages of the TCM designs were mainly due to lower correlation as well as higher impedance matching and coupling efficiency. Moreover, a combined usage study based on weighted ME over different user cases established that on average TCM designs outperform conventional designs by up to 1.6 dB. This suggests that the TCM designs not only give superior performance in FS, but also in realistic user scenarios.},
  author       = {Vasilev, Ivaylo and Lau, Buon Kiong},
  issn         = {1548-5757},
  keyword      = {impedance matching and mutual coupling,mobile antennas,MIMO systems},
  language     = {eng},
  pages        = {758--761},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Antennas and Wireless Propagation Letters},
  title        = {On user effects in MIMO handset antennas designed using characteristic modes},
  volume       = {15},
  year         = {2016},
}