Title: Study of decoupling between closely spaced microstrip MIMO antennas using microstrip resonator

Authors: Swati Bhattacharjee; Chandan Kumar Ghosh

Addresses: Department of Electronics and Communication Engineering, Asansol Engineering College, Asansol, West Bengal, India ' Department of Electronics and Communication Engineering, Dr. B.C. Roy Engineering College, Durgapur, West Bengal, India

Abstract: This paper presents a novel decoupling technique between two closely spaced MIMO antennas whose edge-to-edge spacing is 0.03 λ (1.975 mm) where λ is the wavelength in the dielectric medium. The closely spaced MIMO antennas have a major disadvantage of high mutual coupling (MC) which affects its entire characteristics; thereby degrading the antenna performance. To overcome this problem, a microstrip resonator structure is introduced in between the antennas that act as a decoupled device. The microstrip resonator acts as an electrical wall between the MIMO antennas. The antenna parameters are simulated using IE3D EM simulator and a suppression of 48 dB MC is achieved at the resonant frequency of 4.85 GHz. The MIMO antennas have been fabricated and the results are compared with the simulated ones. The antenna finds its suitability in applications in fields of wireless communication, WLAN and satellite communication systems.

Keywords: microstrip antenna; MIMO; mutual coupling; MC; microstrip resonator; wireless communication.

DOI: 10.1504/IJSCC.2023.129934

International Journal of Systems, Control and Communications, 2023 Vol.14 No.2, pp.180 - 194

Received: 31 Aug 2022
Accepted: 12 Oct 2022
Published online: 03 Apr 2023 *

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