Enhanced isolation with defected ground structure in MIMO antenna | Zendy

Anitha R. | Zendy; Sarin V.P. | Zendy; Mohanan P. | Zendy; Vasudevan K. | Zendy

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Enhanced isolation with defected ground structure in MIMO antenna

Author(s) -

Anitha R.,

Sarin V.P.,

Mohanan P.,

Vasudevan K.

Publication year - 2014

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2014.2795

Subject(s) - isolation (microbiology) , mimo , antenna (radio) , electronic engineering , computer science , physics , engineering , acoustics , telecommunications , biology , beamforming , microbiology and biotechnology

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.

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