7×7 Flexible Ultrasonic Energy Harvester Array
The PUEH (Piezoelectric Ultrasonic Energy Harvester) is a flexible, array-based wireless energy harvesting device designed for powering bio-implantable micro-systems. This 7×7 (49-element) array integrates high-performance PZT/epoxy 1-3 piezoelectric composites with multilayered wavy copper electrodes embedded in a PDMS elastomer membrane. The device converts externally applied ultrasound waves into continuous electrical output, enabling wireless charging of energy storage components and direct powering of microelectronics. With its ability to conform to curved organ surfaces and transmit energy through biological tissue, the PUEH represents a breakthrough in self-powered, wirelessly rechargeable implantable medical devices.
Parameter | Specification |
|---|---|
Device Name | Piezoelectric Ultrasonic Energy Harvester (PUEH) |
Array Configuration | 7×7 Matrix Array / 49 Elements |
Piezoelectric Material | PZT/Epoxy 1-3 Composite |
Element Footprint | 1.5 mm × 1.5 mm |
Operating Frequency | 350 kHz |
Output Voltage | Up to 2.1 Vpp |
Output Current | Up to 4.2 μA4.2\ \mu\text{A}4.2 μA |
Electromechanical Coupling (k33k_{33}k33) | ~0.73 |
Substrate/Encapsulation | PDMS Elastomer |
Device Thickness | ~2 mm |
Bending Capability | >90 degrees |
Harvested Power | ~40 nW (capacitor charging) |
In Vitro Attenuation | ~15% through 14 mm tissue |
Primary Application | Wireless Power for Bio-Implantable Devices |
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