Investigating the effects of parasitic components on wireless RF energy harvesting

Abstract

This work presents the effect of parasitic components on the performance of wireless RF energy h�rvesters. Since ambient RF power density is low, only optimal wireless RF energy harvesters will be able to power remote microwatt sensors. By knowing the effect of each parasitic component on the performance of wireless RF harvesters, components may be realized or selected that increases the overall efficacy of the harvester. The analytical and experimental investigation of the component parastics on the harvester output performance is compared at various operating frequencies; both at HF and UHF.

Printed Electronics in Radiofrequency Energy Harvesters and Wireless Power Transfer Rectennas for IoT Applications

“…[106] Selection of a diode is an essential step in rectifier design because its rectification performance depends on the diode parameters: junction capacitance (preferably higher to maximize maximum operating frequency, PCE), threshold voltage (preferably low to maximize efficiency in a low power radiation environment, PCE), junction tension and conduction resistance (preferable low to maximize PCE), and saturation current (low preferable for sensitive rectifier, high for broadband). [55,66,[109][110][111] The most commonly used diode is the Schottky diode due to its low junction capacitance, low threshold voltage, and high saturation current. [112][113][114] TFT transistors can also be operated as diodes in transdiode mode, and, although their low performance compared to Schottky diodes, they are sometimes preferred due to their simple fabrication process.…”