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This summary is machine-generated.

This study introduces a novel aluminum nitride (AlN) based wireless passive sensor that functions as both an antenna and a temperature sensor for harsh environments. It accurately measures high temperatures up to 700 °C by detecting shifts in resonant frequency.

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dielectric constanthigh-temperature environmentpassive wirelesspatch antenna temperature sensor

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Sensor Technology

Background:

  • High-temperature environments pose challenges for traditional sensors.
  • Wireless passive sensors offer advantages in remote monitoring and harsh conditions.

Purpose of the Study:

  • To develop and validate an aluminum nitride (AlN) based patch antenna wireless passive sensor for high-temperature measurement.
  • To integrate sensing and wireless communication capabilities in a single device for harsh environments.

Main Methods:

  • Utilized High-Frequency Simulation Structure (HFSS) software for sensor design and optimization.
  • Fabricated the sensor using thick-film technology with an AlN ceramic substrate and silver-palladium alloy conductors.
  • Employed a vector network analyzer to characterize sensor performance up to 700 °C.

Main Results:

  • The AlN-based sensor demonstrated reliable operation up to 700 °C.
  • A direct correlation was observed between temperature increase and resonant frequency decrease.
  • Achieved an absolute sensitivity of 104.77 KHz/°C for temperature measurement.

Conclusions:

  • Validated the feasibility of AlN-based patch antenna wireless passive sensors for high-temperature applications.
  • The developed sensor is suitable for use in high-temperature, chemically corrosive, and other harsh environments.
  • Presents a new material and temperature-sensitive structure for advanced high-temperature metrology.