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Compact 8-port EMSIW MIMO antenna with high isolation for sub-6 GHz communication systems

Published online by Cambridge University Press:  10 February 2025

Gunjan Srivastava Open the ORCID record for Gunjan Srivastava [Opens in a new window] ,
Vimal Kumar  and
Akhilesh Mohan Open the ORCID record for Akhilesh Mohan [Opens in a new window]
Gunjan Srivastava
Affiliation:
Department of Electronics and Communication Engineering, Graphics Era (Deemed to be) University Dehradun, Dehradun, India
Vimal Kumar
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, India
Akhilesh Mohan*
Affiliation:
Department of Electronics and Communication Engineering, Indian Institute of Technology Roorkee, India
*
Corresponding author: Akhilesh Mohan; Email: [email protected]
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Abstract

A compact 8-port eighth-mode substrate-integrated waveguide (EMSIW) multiple-input multiple-output (MIMO) antenna is presented in this paper. It consists of eight EMSIW cavities placed side by side sharing their open-ended edges which are separated by rectangular slots. High isolation (>22 dB) between the antenna elements over the entire operating band is obtained by the strategic placement of rectangular slots and vias. The open-ended region of EMSIW cavity resonator and the edges of the diagonal slots help in the excitation of TE110 mode at 5.5 GHz. The simulated bandwidth of MIMO antenna is 180 MHz, while the measured bandwidth is 220 MHz. The proposed MIMO antenna system has potential applications for sub-6 GHz communication systems.

Keywords

8-portantennaEMSIWlow mutual couplingMIMO
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 16 , Special Issue 10: Swedish microwave days 2023 , December 2024 , pp. 1749 - 1755
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Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

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