A Wideband, Quasi-Isotropic, Kilometer-Range FM Energy Harvester for Perpetual IoT
| Autor: | Tong-Hong Lin, Eui Min Jung, Yepu Cui, Aline Eid, Xuanke He, Jimmy Hester, Gregory D. Abowd, Wang-Sang Lee, Manos M. Tentzeris, Thad Starner |
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| Rok vydání: | 2020 |
| Předmět: |
Imagination
Physics business.industry media_common.quotation_subject Bandwidth (signal processing) Electrical engineering 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Kilometer Sensor node 0202 electrical engineering electronic engineering information engineering Structural health monitoring Precision agriculture Electrical and Electronic Engineering Wideband Omnidirectional antenna business media_common |
| Zdroj: | IEEE Microwave and Wireless Components Letters. 30:201-204 |
| ISSN: | 1558-1764 1531-1309 |
| DOI: | 10.1109/lmwc.2019.2957653 |
| Popis: | Unlike conventional energy harvesters that are tuned to individual frequencies and are directional, the proposed wideband (23% fractional bandwidth), omnidirectional system harvests from all FM towers in vicinity. Hence, it does not require each sensor node to be carefully aligned to any one source and makes itself suited for mass-deployment applications such as precision agriculture and structural health monitoring. It harvests as much as 923 $\mu \text{W}$ on a rooftop at 1.54 km from an FM tower while retaining omnidirectionality partly thanks to the proposed antenna, which has a wider bandwidth and a higher measured gain (2.0 dBi) than the commercial reference wideband antenna. It achieves competitive efficiency (56%) and sensitivity (−17 dBm) while retaining wideband operation rather than being specifically optimized to individual frequencies. The system (fabricated on low-cost FR4) harvested outside ambient FM energy indoors at the same 1.54-km location to power a wireless sensor node without needing to shut down periodically. |
| Databáze: | OpenAIRE |
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