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Performance of a multiband diversity antenna with hand effects

Plicanic, Vanja LU ; Lau, Buon Kiong LU and Ying, Zhinong (2008) 2008 IEEE International Workshop on Antenna Technology In Proceedings of iWAT2008 p.478-481
Abstract
The implementation of multiband diversity antennas in compact mobile handsets, for the purpose of increasing transmission quality, is a topic of current interest in the mobile phone industry. In order to achieve the expected performance improvement in typical operating conditions, we not only have to contend with the challenges of designing multiple multiband antennas, which are closely spaced within the compact handset and thus strongly interacting with one another electromagnetically [1], we also need to keep in check the electromagnetic interaction between the whole antenna system (i.e., the handset) and the user.

Previous studies have concluded that the presence of a user degrades the mean effective gain (MEG) of the diversity... (More)
The implementation of multiband diversity antennas in compact mobile handsets, for the purpose of increasing transmission quality, is a topic of current interest in the mobile phone industry. In order to achieve the expected performance improvement in typical operating conditions, we not only have to contend with the challenges of designing multiple multiband antennas, which are closely spaced within the compact handset and thus strongly interacting with one another electromagnetically [1], we also need to keep in check the electromagnetic interaction between the whole antenna system (i.e., the handset) and the user.

Previous studies have concluded that the presence of a user degrades the mean effective gain (MEG) of the diversity antennas significantly [1]-[3]. Different results have been presented on the effect of the user on the correlation coefficient, no effect [1] and a significant increase of the correlation [2], [3], have been pointed out. However, these studies have been performed on simple single band antennas in talk position. In this paper a more realistic approach is presented by choosing the diversity antenna system to comprise compact versions of PIFA and monopole antennas which cover three WCDMA bands: WCDMA850, WCDMA1800 and UMTS [4]. Such compact antennas are easily conformable for small mobile phone products [4]. The choice of the bands, as well as the evaluation of the diversity performance for the data mode position, is derived from the increasing demand on HSDPA applications in the mobile phone market.

The investigation of user interaction presented in this paper focuses on the comparison between the free space and data mode diversity performance of a tri-band “stick” phone size prototype in the uniform 3D propagation environment. A state-of-the-art phantom hand from IndexSAR [5] is used to hold the diversity prototype in the data mode position. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
hand effects, Multi-band antenna, correlation, diversity
in
Proceedings of iWAT2008
pages
4 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
2008 IEEE International Workshop on Antenna Technology
external identifiers
  • WOS:000257064200120
  • Scopus:50249105721
ISBN
978-1-4244-1523-3
DOI
10.1109/IWAT.2008.4511395
language
English
LU publication?
yes
id
d3a10246-a6ed-47f1-ab61-36a4fab77934 (old id 1152107)
alternative location
http://ieeexplore.ieee.org/iel5/4497217/4511268/04511395.pdf
date added to LUP
2008-05-23 13:04:52
date last changed
2017-01-01 08:03:42
@inproceedings{d3a10246-a6ed-47f1-ab61-36a4fab77934,
  abstract     = {The implementation of multiband diversity antennas in compact mobile handsets, for the purpose of increasing transmission quality, is a topic of current interest in the mobile phone industry. In order to achieve the expected performance improvement in typical operating conditions, we not only have to contend with the challenges of designing multiple multiband antennas, which are closely spaced within the compact handset and thus strongly interacting with one another electromagnetically [1], we also need to keep in check the electromagnetic interaction between the whole antenna system (i.e., the handset) and the user.<br/><br>
Previous studies have concluded that the presence of a user degrades the mean effective gain (MEG) of the diversity antennas significantly [1]-[3]. Different results have been presented on the effect of the user on the correlation coefficient, no effect [1] and a significant increase of the correlation [2], [3], have been pointed out. However, these studies have been performed on simple single band antennas in talk position. In this paper a more realistic approach is presented by choosing the diversity antenna system to comprise compact versions of PIFA and monopole antennas which cover three WCDMA bands: WCDMA850, WCDMA1800 and UMTS [4]. Such compact antennas are easily conformable for small mobile phone products [4]. The choice of the bands, as well as the evaluation of the diversity performance for the data mode position, is derived from the increasing demand on HSDPA applications in the mobile phone market.<br/><br>
The investigation of user interaction presented in this paper focuses on the comparison between the free space and data mode diversity performance of a tri-band “stick” phone size prototype in the uniform 3D propagation environment. A state-of-the-art phantom hand from IndexSAR [5] is used to hold the diversity prototype in the data mode position.},
  author       = {Plicanic, Vanja and Lau, Buon Kiong and Ying, Zhinong},
  booktitle    = {Proceedings of iWAT2008},
  isbn         = {978-1-4244-1523-3},
  keyword      = {hand effects,Multi-band antenna,correlation,diversity},
  language     = {eng},
  pages        = {478--481},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Performance of a multiband diversity antenna with hand effects},
  url          = {http://dx.doi.org/10.1109/IWAT.2008.4511395},
  year         = {2008},
}