Scalp-Implantable MIMO Antenna for High-Data-Rate Head Implants

Iqbal, Amjad; Al-Hasan, Muath; Ben Mabrouk, Ismail; Nedil, Mourad

Abstract

A quad-element multiple-input multiple-output (MIMO) antenna is designed at 433 MHz Industrial, Scientific, and Medical (ISM) band, to increase the transmission data-rate and minimize the multipath fading. The proposed MIMO antenna consists of semi-circular meandered radiators with a shared ground. It is designed and optimized inside an implantable medical device (IMD) in a human head model. The antenna’s results show a 10-dB fractional bandwidth (FBW) of 38.26% (355–523 MHz) with a peak realized gain of -28.3 dBi. A high isolation (> 32.6 dB) between MIMO elements is obtained using a central metallic via. Specific absorption rate (SAR) and link budget are analyzed to validate the effectiveness of this antenna. The 4 × 4 MIMO channel parameters are calculated and validated. Furthermore, this antenna provides a channel capacity of 19.9 bps/Hz which is about three times higher than the single-input single-output (SISO) configuration of ≈5.89 bps/Hz. Hence, this MIMO configuration is a promising candidate for high-data-rate head implants.

Citation

Iqbal, A., Al-Hasan, M., Ben Mabrouk, I., & Nedil, M. (2021). Scalp-Implantable MIMO Antenna for High-Data-Rate Head Implants. IEEE Antennas and Wireless Propagation Letters, 20(12), 2529-2533. https://doi.org/10.1109/lawp.2021.3117345

• Journal Article Type: Article
• Online Publication Date: Oct 4, 2021
• Publication Date: 2021-12
• Deposit Date: Oct 7, 2021
• Publicly Available Date: Oct 7, 2021
• Journal: IEEE Antennas and Wireless Propagation Letters
• Print ISSN: 1536-1225
• Electronic ISSN: 1548-5757
• Publisher: Institute of Electrical and Electronics Engineers
• Peer Reviewed: Peer Reviewed
• Volume: 20
• Issue: 12
• Pages: 2529-2533
• DOI: https://doi.org/10.1109/lawp.2021.3117345
• Publisher URL: https://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=7727