Compact MIMO antenna with cross polarized configuration

Authors:
Wannipa Yadum;Nobuo Nakajima
Affiliations:
Department of Human Communication, The University of Electro-Communications, Chofu-shi, Tokyo, Japan;Department of Human Communication, The University of Electro-Communications, Chofu-shi, Tokyo, Japan
Venue:
ELECTRO'06 Proceedings of the 4th WSEAS International Conference on Electromagnetics, Wireless and Optical Communications
Year:
2006

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Abstract

MIMO is the key technology to improve spectrum efficiency in the wireless communications. However, MIMO may perform poorly as a mobile terminal with a very small antenna. This paper describes an experimental study on the performance of a compact MIMO antenna. In order to improve the performance, a cross polarized configuration was investigated as well as a co-polarized configuration. Experiments were carried out in 2.6 GHz band with antenna element spacing from 6 mm to 5 cm. A helical antenna with a ceramic substrate is used as a radiator to make the antenna small. The experiments verified that the cross polarized configuration enables better performance compared to the co-polarized configuration. The average correlation was about 0.1 in the case of 1 cm antenna element spacing.