A Passive Wireless Sensor Network for Temperature Mapping Inside a Shielded Coaxial Enclosure
| Autor: | Sergio Lopez-Soriano, Ivan Spassovsky, Josep Parron, Gaetano Marrocco |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Tokamak
Acoustics Cyclotron Biochemistry law.invention law Shielded cable Wireless Electron vacuum tubes electron vacuum tubes Maser Physics business.industry Temperature mapping Organic Chemistry Settore ING-INF/02 - Campi Elettromagnetici Wireless RFID sensor network backscattering modulation electron vacuum tubes temperature mapping backscattering modulation temperature mapping Backscattering modulation Wireless RFID sensor network Coaxial business Wireless sensor network Sensitivity (electronics) |
| Zdroj: | IEEE Journal of Radio Frequency Identification. 2:144-151 |
| ISSN: | 2469-729X |
| DOI: | 10.1109/jrfid.2018.2860049 |
| Popis: | This contribution addresses the electromagnetic feasibility of the wireless temperature monitoring inside a coaxial cavity resembling a portion of a high-power high-frequency cyclotron auto-resonance maser for plasma heating in the new generation of DEMO TOKAMAK machines. The scenario is investigated as a potential communication channel for a ultrahigh-frequency radiofrequency identification (RFID) sensor network where cavity probes are used to both excite the coaxial cavity and to collect the temperature data scattered back by sensor antennas. By using a theoretical near-field analysis of a simplified model of the cavity and of the reader/sensor devices it is demonstrated that a two-probes architecture is suitable to interact with more than $N =$ 16 equally spaced RFID temperature sensors (having power sensitivity of −8.3 dB mW) over the surface of a 0.5 m tube by using less than 20 dB mW power emitted by the reader. The theoretical results are corroborated by experimental data with a mock-up of the cavity and realistic prototypes of miniaturized RFID radio-sensors and excitation probes. |
| Databáze: | OpenAIRE |
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