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A GaN-based wireless monitoring system for high-temperature applications

Ahmad Hassan, Mohamed Ali, Aref Trigui, Yvon Savaria and Mohamad Sawan

Article (2019)

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A fully-integrated data transmission system based on gallium nitride (GaN) high-electron-mobility transistor (HEMT) devices is proposed. This system targets high-temperature (HT) applications, especially those involving pressure and temperature sensors for aerospace in which the environmental temperature exceeds 350 degrees °C. The presented system includes a front-end amplifying the sensed signal (gain of 50 V/V), followed by a novel analog-to-digital converter driving a modulator exploiting the load-shift keying technique. An oscillation frequency of 1.5 MHz is used to ensure a robust wireless transmission through metallic-based barriers. To retrieve the data, a new demodulator architecture based on digital circuits is proposed. A 1 V amplitude difference can be detected between a high-amplitude (data-on) and a low-amplitude (data-off) of the received modulated signal. Two high-voltage supply levels (+14 V and -14 V) are required to operate the circuits. The layout of the proposed system was completed in a chip occupying 10.8 mm(2). The HT characterization and modeling of integrated GaN devices and passive components are performed to ensure the reliability of simulation results. The performance of the various proposed building blocks, as well as the whole system, have been validated by simulation over the projected wide operating temperature range (25-350 degrees °C).

Uncontrolled Keywords

GaN HEMT; harsh environment; high-temperature applications; integrated circuits; wireless data transmission

Subjects: 2500 Electrical and electronic engineering > 2500 Electrical and electronic engineering
2500 Electrical and electronic engineering > 2506 Electronic circuits and devices
2500 Electrical and electronic engineering > 2513 Data communications
Department: Department of Electrical Engineering
Funders: CRSNG/NSERC, CMC Microsystems, National Research Council Canada (NRC)/Conseil national de recherches Canada (CNRC), SAFRAN, Airbus Defence and Space
Grant number: STPGP463394
PolyPublie URL: https://publications.polymtl.ca/4931/
Journal Title: Sensors (vol. 19, no. 8)
Publisher: MDPI
DOI: 10.3390/s19081785
Official URL: https://doi.org/10.3390/s19081785
Date Deposited: 18 Feb 2022 15:09
Last Modified: 09 Apr 2024 03:26
Cite in APA 7: Hassan, A., Ali, M., Trigui, A., Savaria, Y., & Sawan, M. (2019). A GaN-based wireless monitoring system for high-temperature applications. Sensors, 19(8), 1785 (17 pages). https://doi.org/10.3390/s19081785


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