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An ultra miniaturized high data rate MIMO antenna for wireless implantable medical application

BALU ASHVANTH1,*

Affiliation

  1. Dept. of ECE, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai-62, India

Abstract

A compact Multiple input multiple output (MIMO) antenna is designed and investigated for increasing the transmission data rate and minimizing the multipath fading in implantable biomedical applications. The proposed antenna has an overall dimension of π× ×0.635 and uses an RT3010 substrate of thickness 0.635mm. The newly designed antenna elements adopt two zigzag structures in every antenna element, one with patch interconnection while the other acts as a virtual ground. The zig zag structure in the ground layer improves the gain to -25.2dB, which is reasonably high among this kind of compact four element MIMO antenna. Both of them are coupled together through metallic via to lower the resonant frequency to 430MHz covers the Medical Implant Communication Services (MICS) band of 402–405MHz. The horizontal slots in the patch and “T” slots in the ground plane are etched to reduce mutual coupling among the feeding ports. The antenna is optimized to cover the frequency range 370MHz to 540MHz with a -10dB fractional bandwidth of 37.74%. Simulation in a skin phantom provides better impedance matching and mutual coupling of less than -20dB in the operating band. The simulation results are validated by the measurement carried over with an antenna inserted in a solution. The measurements are in good accordance with simulation results..

Keywords

MIMO Antenna, Biomedical applications, MICS band, Miniaturized antenna.

Submitted at: Sept. 28, 2023
Accepted at: July 30, 2024

Citation

BALU ASHVANTH, An ultra miniaturized high data rate MIMO antenna for wireless implantable medical application, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 7-8, pp. 327-334 (2024)