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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2023-04-26
Isolation and Gain Improvement of Multiple Input Multiple Output Antenna Using Frequency Selective Surfaces
By
Anett Antony,

    Dr. Anett Antony

    Department of Electronics and Communication Engineering

    Indian Institute of Information Technology

    India

    Homepage

Bidisha Dasgupta

    Dr. Bidisha Dasgupta

    Department of Electronics and Communication Engineering

    Indian Institute of Information Technology Guwahati

    India

    Homepage

Progress In Electromagnetics Research Letters, Vol. 110, 63-71, 2023
doi:10.2528/PIERL23031504 | Google Scholar

Abstract
This letter addresses a new approach to improve the gain and isolation of a multiple input multiple output (MIMO) antenna. A C-shaped printed antenna with both ends terminated by a small rectangular section is designed as the basic antenna element for a 2 element MIMO antenna of size 0.8λ×0.67λ×0.04λ (λ, corresponding to lowest operating frequency) which operates over the X band with peak gain of 3 dBi. By introducing a double layered frequency selective surface (FSS) of unit cell dimension 0.2λ×0.2λ×0.0375λ between the two antenna elements as an isolation wall and additionally by placing a 5×3 array of FSS geometry as a reflector below the antenna, the isolation and gain of the two element MIMO antenna are improved by 37 dB and 3 dBi, respectively. The proposed FSS loaded MIMO antenna provides very high isolation about -51 dB (measured) and a very low envelope correlation coefficient (ECC) of 0.000177282 (simulated) using far field approach and 0.000000033414 (calculated measured) using scattering (S) parameter approach. Further MIMO parameters like diversity gain (DG), total active reflection coefficient (TARC), mean effective gain (MEG) and channel capacity loss (CCL) have been evaluated. The radiation pattern is unidirectional in nature with a peak gain about 6 dBi. The letter also presents detailed design guidelines for the proposed FSS loaded MIMO antenna along with their verifications for Ku and K bands. The proposed structure can also be scaled up to a 4 element MIMO antenna.
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Citation
Anett Antony, and Bidisha Dasgupta, "Isolation and Gain Improvement of Multiple Input Multiple Output Antenna Using Frequency Selective Surfaces," Progress In Electromagnetics Research Letters, Vol. 110, 63-71, 2023.
doi:10.2528/PIERL23031504
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