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Communication Dans Un Congrès Année : 2022

Thermal Effects on Low-Power RF-to-dc Voltage Multiplier for Battery-Free Sensing and IoT

Xiaoqiang Gu
  • Fonction : Auteur
Jorge Virgilio de Almeida
  • Fonction : Auteur
Roni Khazaka
  • Fonction : Auteur
Ke Wu
  • Fonction : Auteur

Résumé

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.
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Dates et versions

hal-04109483 , version 1 (30-05-2023)

Identifiants

Citer

Xiaoqiang Gu, Jorge Virgilio de Almeida, Simon Hemour, Roni Khazaka, Ke Wu. Thermal Effects on Low-Power RF-to-dc Voltage Multiplier for Battery-Free Sensing and IoT. 2022 Wireless Power Week (WPW), Jul 2022, Bordeaux, France. pp.29-32, ⟨10.1109/WPW54272.2022.9853993⟩. ⟨hal-04109483⟩
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