Compact and ultra-wideband implantable MIMO antenna for deep tissue wireless applications

Daibin Jing, Hua Li, Qimao Huang, Xiao Ding and Shaoqiu Xiao

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 15, 1679-1694

Abstract: To overcome the mismatch issues and achieve high data rate for medical applications in human body environment, an ultra-wideband implantable MIMO antenna is proposed. The antenna has a compact size of 9 × 9 × 0.508 mm3. By loading an H-shaped parasitic patch on top of the superstrate to improve impedance matching, the antenna achieves an ultra-wide bandwidth of 1.24 GHz, covering two frequency bands: industrial, scientific, and medical (ISM) (2.4-2.48 GHz), and midfield band (1.52-1.693 GHz). The MIMO antenna consists of two elements and shares a slotted ground plane, achieving high isolation. The |S21| is below −20 dB in both simulation and measurement within the ultra-wide operating frequency band. The antenna is integrated with virtual electronic components, and the robustness of the antenna is evaluated by comparing and analyzing the performance before and after integration. S-parameters are measured, more than 62.6% of the bandwidth was obtained.

Date: 2024
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DOI: 10.1080/09205071.2024.2394436

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