Advanced

Design of closely packed pattern reconfigurable antenna array for MIMO terminals

Li, Hui LU ; Lau, Buon Kiong LU and He, Sailing (2017) In IEEE Transactions on Antennas and Propagation 65(9). p.4891-4896
Abstract
In this paper, a compact pattern reconfigurable dual-antenna array is designed at 2.65 GHz for MIMO terminal applications, such as laptops. Each antenna is composed of two layers, i.e., the monopole layer and the PIFA layer. By switching the PIN diodes on each layer, its radiation patterns can be varied between conical and boresight patterns. Two such identical antennas are placed side by side on a common ground plane for MIMO application, providing altogether four operating modes. The center-to-center separation between the antennas is 0.25 wavelength, to keep the overall array size compact. To facilitate an isolation of above 17 dB over all modes for this compact array, two decoupling techniques based on decoupling slits and shielding... (More)
In this paper, a compact pattern reconfigurable dual-antenna array is designed at 2.65 GHz for MIMO terminal applications, such as laptops. Each antenna is composed of two layers, i.e., the monopole layer and the PIFA layer. By switching the PIN diodes on each layer, its radiation patterns can be varied between conical and boresight patterns. Two such identical antennas are placed side by side on a common ground plane for MIMO application, providing altogether four operating modes. The center-to-center separation between the antennas is 0.25 wavelength, to keep the overall array size compact. To facilitate an isolation of above 17 dB over all modes for this compact array, two decoupling techniques based on decoupling slits and shielding wall are effectively combined. The envelope correlation coefficient (ECC) of the far-field patterns in the four modes are below 0.05 in free space, and below 0.1 for most cases in indoor and outdoor scenarios. The only exception is the monopole-PIFA mode in the outdoor scenario, but the ECC is still below 0.3 for this case. The measured efficiencies of the antennas are between -1.7 dB (68%) to -0.7 dB (85%) for all modes. Therefore, good diversity and MIMO performances are expected for the proposed design. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Antenna array, pattern diversity, reconfigurable antenna, MIMO system
in
IEEE Transactions on Antennas and Propagation
volume
65
issue
9
pages
6 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
ISSN
0018-926X
DOI
10.1109/TAP.2017.2730249
language
English
LU publication?
yes
id
21df850f-9e00-4967-8a2a-9ccbf35d3485
date added to LUP
2017-06-22 03:45:28
date last changed
2017-09-07 13:42:30
@article{21df850f-9e00-4967-8a2a-9ccbf35d3485,
  abstract     = {In this paper, a compact pattern reconfigurable dual-antenna array is designed at 2.65 GHz for MIMO terminal applications, such as laptops. Each antenna is composed of two layers, i.e., the monopole layer and the PIFA layer. By switching the PIN diodes on each layer, its radiation patterns can be varied between conical and boresight patterns. Two such identical antennas are placed side by side on a common ground plane for MIMO application, providing altogether four operating modes. The center-to-center separation between the antennas is 0.25 wavelength, to keep the overall array size compact. To facilitate an isolation of above 17 dB over all modes for this compact array, two decoupling techniques based on decoupling slits and shielding wall are effectively combined. The envelope correlation coefficient (ECC) of the far-field patterns in the four modes are below 0.05 in free space, and below 0.1 for most cases in indoor and outdoor scenarios. The only exception is the monopole-PIFA mode in the outdoor scenario, but the ECC is still below 0.3 for this case. The measured efficiencies of the antennas are between -1.7 dB (68%) to -0.7 dB (85%) for all modes. Therefore, good diversity and MIMO performances are expected for the proposed design.},
  author       = {Li, Hui and Lau, Buon Kiong and He, Sailing},
  issn         = {0018-926X},
  keyword      = {Antenna array, pattern diversity, reconfigurable antenna, MIMO system},
  language     = {eng},
  number       = {9},
  pages        = {4891--4896},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  series       = {IEEE Transactions on Antennas and Propagation},
  title        = {Design of closely packed pattern reconfigurable antenna array for MIMO terminals},
  url          = {http://dx.doi.org/10.1109/TAP.2017.2730249},
  volume       = {65},
  year         = {2017},
}