DocumentCode
63518
Title
Enhanced isolation with defected ground structure in MIMO antenna
Author
Anitha, R. ; Sarin, V.P. ; Mohanan, P. ; Vasudevan, K.
Author_Institution
Centre for Res. in Electromagn. & Antennas (CREMA), Cochin Univ. of Sci. & Technol., Cochin, India
Volume
50
Issue
24
fYear
2014
fDate
11 20 2014
Firstpage
1784
Lastpage
1786
Abstract
A defected ground structure (DGS) for improving isolation between four ports in a collocated multiple-input-multiple-output (MIMO) antenna is proposed. Isolation improvement by 7 dB is achieved by reducing surface waves within the dielectric substrate. Mutual coupling values as low as -25 dB are obtained along both the E- and H-planes. The MIMO antenna includes a square patch antenna surrounded by a square ring patch antenna with the DGS etched in the form of a square ring. The DGS effectively suppresses the cross-polarisation levels for all radiating modes. The design and effectiveness of the DGS in improving isolation for a fabricated 4-port antenna are discussed.
Keywords
defected ground structures; microstrip antenna arrays; polarisation; 4-port antenna; MIMO antenna; cross-polarisation; defected ground structure; dielectric substrate; multiple-input-multiple-output antenna; mutual coupling; square ring patch antenna; surface waves;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2014.2795
Filename
6969316
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