Employing EBG Structures in Multiantenna Systems for Improving Isolation and Diversity Gain

Author

Payandehjoo, Kasra ; Abhari, Ramesh

Author_Institution

Dept. of Electr. & Comput. Eng., McGill Univ., Montreal, QC, Canada

Volume

8

fYear

2009

fDate

7/1/1905 12:00:00 AM

Firstpage

1162

Lastpage

1165

Abstract

This letter investigates the effect of mutual coupling on the operation of a multiantenna system. Radiation pattern, input impedance, gain, and efficiency of a slot antenna in proximity of another slot antenna are studied through simulations. A mushroom-type electromagnetic band-gap (EBG) structure is designed to isolate the antennas and reduce the influence of coupling on radiation characteristics. Two multiantenna prototypes are fabricated and experimentally evaluated. Measurement results confirm the improvement of isolation between the antennas by 28 dB at the radiation frequency of 5.2 GHz when the EBG reflector is utilized. In addition, the diversity gain of the two prototypes are measured using a reverberation chamber demonstrating an increase of 3.3 dB in the combined received power for 99% of transmission trials when the EBG structure is added in the substrate of the multiantenna system.

Keywords

MIMO communication; amplification; antenna radiation patterns; diversity reception; photonic band gap; slot antennas; EBG reflector; diversity gain; electromagnetic band gap; frequency 5.2 GHz; gain 28 dB; gain 3.3 dB; input impedance; multiantenna system; radiation characteristics; radiation frequency; radiation pattern; reverberation chamber; slot antenna; Coupling; diversity gain; electromagnetic band-gap (EBG) structures; multiantenna structures; multiple-input–multiple-output (MIMO) systems; slot antennas;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2009.2034877

Filename

5290103