Mutual coupling cancellation for compact MIMO antenna with 3 dB hybrid

Author

Nakajima, Nobuo ; Yamazaki, Tomoko ; Ni, Wei

Author_Institution

Sch. of Inf., Univ. of Electro-Commun., Chofu, Japan

fYear

2011

fDate

Feb. 28 2011-March 3 2011

Firstpage

1

Lastpage

4

Abstract

MIMO is one of the important technologies in LTE, WiMAX and LTE-Advanced for improving spectrum efficiency. However, it is not easy to make a compact MIMO antenna for portable terminals, keeping high performance. One of the problems is mutual coupling among the antennas. This reduces the efficiency of the antenna. In this paper, a 3 dB hybrid is used to cancel the mutual coupling. This idea can be applied to 2^N (N is integer) number of MIMO antennas. In addition, by using tunable impedance matching circuits, wide operational bandwidth is available. Experiments were carried out for 2 MIMO antennas at 2.4-2.6 GHz band.

Keywords

Long Term Evolution; MIMO communication; UHF antennas; WiMax; antenna arrays; LTE-Advanced; WiMax; compact MIMO antenna; frequency 2.4 GHz to 2.6 GHz; gain 3 dB; mutual coupling cancellation; tunable impedance matching circuit; Antennas; MIMO; WiMAX; LTE; MIMO; cellular; decoupling;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication, Vehicular Technology, Information Theory and Aerospace & Electronic Systems Technology (Wireless VITAE), 2011 2nd International Conference on

Conference_Location

Chennai

Print_ISBN

978-1-4577-0786-5

Type

conf

DOI

10.1109/WIRELESSVITAE.2011.5940842

Filename

5940842