An efficient small size electromagnetic energyharvesting sensor for low-DC-powerapplications
No Thumbnail Available
Date
2017
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
IET
Abstract
An efficient small size electromagnetic energy harvesting sensor for low-DC-power applications is proposed. Thesensor consists of two main parts: a dual polarisation square patch antenna used to collect the RF energy at a central frequencyof 2.45 GHz, and two voltage doublers rectifier circuit for the RF-to-DC conversion. The overall size of the design is 50 × 50 × 6.2 mm3. Firstly, the antenna is designed using high-frequency structure simulator software; followed by the design of therectifier circuit in advanced design system. After simulations, a sensor prototype is fabricated using F4B as the antennasubstrate. Measurements show that the sensor achieves a comparatively high maximum measured efficiency of 41% for apower level of −10 dBm. The sensor has a simple structure, it is compact sized, light weight, and presents a high RF-to-DCconversion efficiency for low-RF-power levels which can be used to charge different low-DC-power devices