Implantable Wireless Transmission Rectenna System for Biomedical Wireless Applications

Abstract

We introduce a novel RF to DC wireless power transmission implantable rectenna system at Industrial, Scientific and Medical bands (ISM 902.8-928 MHz). An embedded circular antenna receives the externally emitted energy from a patch antenna and converts it to DC power by a rectifying circuit. The system is associated with a metallic reflector which is placed behind the human body enhancing the reception. The rectifying circuit efficiency and the total system's efficiency are determined for different external antenna to human body distances and various embedded depths with or without the reflector. Experimental results, obtained in a realistic environment, validate the predicted performance and provide an initial evaluation of the transmission link. Porcine tissue and bovine tissue are both used during the measurements and results are compared against simulations.

Wearable Flexible Antenna for UWB On-Body and Implant Communications

“…Being in arbitrary position, the channel attenuation may become excessively high in unfavorable capsule positions if both on-body and implant antennas are linearly polarized. Hence, the use of circularly polarized efficient implant antennas, as presented, e.g., in [13][14][15], could significantly improve the channel condition in certain capsule positions. Additionally, enhancement of the power transmission link in the implant communications requiring deep propagation depths, as presented in [14], could also improve the performance of implant communications in practical scenarios.…”

“…The design of new, sophisticated antennas for different body area applications has been an active research topic for several years [12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Recently, there has been recognized a need for especially flexible, wearable antennas for biomedical applications.…”

An efficient 5.8 GHz microwave wireless power transmission system

“…Microwave wireless power transmission (MWPT) has been a promising technology for wireless power transfer via microwaves since 1968. [1][2][3] Because MWPT does not involve wires, it has important applications, such as those in solar power satellite, 4,5 charging of hovering unmanned aerial vehicle, [6][7][8][9] energy supply to remote islands, 10 implantable device, [11][12][13] and energy harvesting. [14][15][16][17][18] A typical MWPT system comprises a microwave power source, a transmitting antenna, a receiving antenna, and a rectifier, as shown in Figure 1.…”

Dual-Polarized Dipole Antenna for Wireless Data and Microwave Power Transfer

“…Currently, wireless power transmission is a research hotspot in the field of an intelligent Internet of Things (IoT), because microwave wireless energy transmission can transmit power to electronic systems or devices, particularly in some special scenarios where electrical energy cannot be provided via cables [1][2][3][4]. Wireless energy transmission has many potential applications.…”