Name
Title | ||
|---|---|---|
Design of Sub-Gigahertz Reconfigurable RF Energy Harvester From −22 to 4 dBm With 99.8% Peak MPPT Power Efficiency |
Abstract | ||
|---|---|---|
To overcome the low-efficiency and limited working range of the existing RF energy harvesting (EH) systems for the wireless Internet-of-Things (IoT) sensors, a novel reconfigurable system is proposed with integrated hill-climbing, maximum power point tracking (MPPT) function for wide input power from −22 to 4 dBm. A conceptual linear model with high accuracy is also proposed to analyze the rectifier efficiency for MPPT operations. The rectifier with off-chip matching is designed with a patch antenna at 915-MHz the industrial, scientific and medical (ISM) band. To further improve the end-to-end efficiency, the harvested power is used to power up the circuit block in system on a chip (SoC) directly, avoiding additional conversion loss. Our proposed reconfigurable 12-stage rectifier with matching network achieves −18.1-dBm sensitivity for 1-
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loading and 36% peak efficiency at 1 dBm. The proposed MPPT function can detect and determine the optimal rectifier stage for loading from 10
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to 1
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. The measured MPPT accuracy is over 87% from −22 to 4 dBm compared to external tuning conditions. The minimum stand-by power is 20 nW at 0.5 V and the overall MPPT power efficiency is over 72% with a peak value of 99.8% including dissipated power. Measurements also show the system can achieve self-startup and self-sustained functions with a 10-
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external capacitor buffer. |
Year | DOI | Venue |
|---|---|---|
2019 | 10.1109/JSSC.2019.2919420 | IEEE Journal of Solid-State Circuits |
Keywords | Field | DocType |
Radio frequency,Maximum power point trackers,Resistance,Capacitors,Loading,Multiplexing,Wireless sensor networks | Electrical efficiency,Rectifier,Capacitor,Patch antenna,System on a chip,Computer science,Maximum power point tracking,Electronic engineering,Radio frequency,Multiplexing,Electrical engineering | Journal |
Volume | Issue | ISSN |
54 | 9 | 0018-9200 |
Citations | PageRank | References |
4 | 0.43 | 0 |
Authors | ||
8 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Zizhen Zeng | 1 | 6 | 0.84 |
| Shanpu Shen | 2 | 16 | 4.51 |
| Xiaopeng Zhong | 3 | 4 | 0.43 |
| Xing Li | 4 | 4 | 0.43 |
| Chi-ying Tsui | 5 | 1939 | 314.94 |
| Amine Bermak | 6 | 493 | 90.25 |
| R. D. Murch | 7 | 2797 | 318.19 |
| Edgar Sánchez-Sinencio | 8 | 696 | 98.37 |