Thermal Effects on Low-Power RF-to-dc Voltage Multiplier for Battery-Free Sensing and IoT
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2022 Wireless Power Week (WPW), 2022 Wireless Power Week (WPW), Bordeaux, France, 2022, 2022-07-05, Bordeaux. 2022-08-17p. 29-32
Resumen en inglés
This work investigates and demonstrates the thermal effects on low-power RF-to-dc voltage multipliers based on Schottky diodes. Such a voltage multiplier is crucial to leverage dc output voltage rectified from low RF input ...Leer más >
This work investigates and demonstrates the thermal effects on low-power RF-to-dc voltage multipliers based on Schottky diodes. Such a voltage multiplier is crucial to leverage dc output voltage rectified from low RF input power to meet the threshold voltage of battery-free sensors and Internet of Things devices. An analytical model is developed, considering thermal-sensitive diode SPICE parameters. The accuracy of this model has been verified based on a result comparison with commercial ADS Harmonic Balance simulator. The analytical model predicts the optimum operating temperature for enhanced RF-to-dc conversion efficiency. Further experimental results show that a 5stage voltage multiplier based on SMS7630 has an optimum temperature of $7.5^\circ\mathrmC$ at -25 dBm. This work can offer a reference or benchmark for optimizing RF-to-dc voltage multipliers at their operating temperatures and avoiding potential service interruptions due to temperature variations.< Leer menos
Palabras clave
Temperature sensors
Radio frequency
Schottky diodes
Analytical models
Electric potential
Wireless sensor networks
Threshold voltage
Internet of Things
Schottky diodes
Sensors
SPICE
Voltage multipliers
Battery-free sensing
IoT
Rectifiers
Schottky diodes
Thermal effects
Voltage multiplier
Wireless power harvesting
Centros de investigación