International Journal of Power Electronics and Drive System (IJPEDS) Vol. 10, No. 2, June 2019, pp. 935~942 ISSN: 2088-8694, DOI: 10.11591/ijpeds.v10.i2.935-942  935 Journal homepage: http://iaescore.com/journals/index.php/IJPEDS Capacitive power transfer in biomedical implantable device: a review Muhammad Zaki bin Mustapa, Shakir Saat, Yusmarnita Yusof, Muslimah Meor Shaari Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia, Malaysia Centre for Telecommunication Research & Innovation Article Info ABSTRACT Article history: Received Sep 6, 2018 Revised Nov 19, 2018 Accepted Feb 15, 2019 This paper presents the development of a new design method of capacitive power transfer (CPT) which is based on hybrid concept for Biomedical Implants. This method is able to improve various issues found in the widely used CPT system that is bipolar CPT method. Based on the ability of this purposed, the simulation of the CPT system has been designed to prove an amount of power transferred through a layer of tissue. The design used to validate the suggested model which to powering implanted device, and it was performed with 3cm square plates, which have a layer of beef with the 5mm thickness in between 2 coupling plate. Power signal was generated by Class E zero voltage switching. The Class E zero voltage switching has been designed to generating alternate current with the 1MHz frequency appropriate to the hybrid CPT system specification. Keywords: Biomedical implant devices, Biosafety of wireless power Transfer Capacitive wireless power Transfer Class E inverter Copyright © 2019 Institute of Advanced Engineering and Science. All rights reserved. Corresponding Author: Muhammad Zaki bin Mustapa, Faculty of Electronic and Computer Engineering, Universiti Teknikal Malaysia, Melaka. Email: m.zaki5377@gmail.com 1. INTRODUCTION Wireless power transfers have been broadly explored for various applications such as electric car charging, smartphone charger, RFID devices, powering implantable devices and much more [1]. Wireless power transfers approach generally can be classified into near field and far field power transfer applications. The near-field approach can be divided into several types which are an inductive resonance frequency coupling (IRFC), ultrasonic energy transfer, and near-field capacitive coupling (NCC). Previously, the comparison of characteristics each type of wireless power transfers have been made by other researchers. Based on comparison made, every type of wireless power transfers has the advantage over other types [2]. This reason reinforces that each type of WPT can be applied according to suitability and requirement of the biomedical implantable device. Advancement of biomedical implants has been successful in the creation of several types of implantable devices such as cardiovascular implantable devices, Cochlear, neural, retinal and more others to meet medical needs. Each type of implantable device has its own specifications. Some implantable device types require a biosafety source of electrical power to operate properly. The sealed battery as the power source of implantable devices can only supply the energy for a limited time. The patient will experience trauma with repeated surgery to replacing the battery. Because of constant dependence on electrical power sources, a wireless power transfer method is required to overcome the limited lack of battery power source. Nowadays, biomedical technology already established with both type wireless power transfer, which is inductive and ultrasound power transfer, and already used for wireless power delivery for several implantable devices such as neural implants. However, both methods have weaknesses in terms of signal interference [3]. Since the inductive power transfer propagating power by inducing electromagnetic field, it is risky to interfere with other surrounding devices that sensitive to the electromagnetic field. Thus, reducing this