Spherical Vector Wave Approach for MIMO Antenna Decoupling

Author

Mohajer, Mehrbod ; Safavi-Naeini, S. ; Chaudhuri, S.K.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Waterloo, Waterloo, ON, Canada

Volume

12

fYear

2013

fDate

2013

Firstpage

1496

Lastpage

1499

Abstract

In this letter, mutual coupling between multiple-input-multiple-output (MIMO) antenna elements are expressed in terms of spherical vector waves (SVWs). Orthogonality of SVWs in the near-field region inspires the idea of exciting different SVWs by different MIMO antenna elements to minimize the mutual coupling. Since coplanar electric and magnetic current sources do not excite the same type of SVW, it is proposed to use them as MIMO antenna elements. Using the proposed approach, the simulation and measurement results show that the closely spaced MIMO antennas with very low mutual coupling can be implemented.

Keywords

MIMO communication; antenna arrays; coplanar waveguides; electromagnetic wave propagation; receiving antennas; transmitting antennas; MIMO antenna decoupling; SVW; coplanar electric current sources; coplanar magnetic current sources; multiple-input-multiple-output antenna elements; mutual coupling minimization; near-field region; propagation paths; receiving antennas; spherical vector wave approach; transmitting antennas; Antenna measurements; Dipole antennas; MIMO; Mutual coupling; Vectors; Cross-correlation; electric and magnetic current sources; multiple-input–multiple-output (MIMO) systems; mutual coupling; spherical vector waves (SVWs);

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2289886

Filename

6656841