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- Title
Wireless Passive Ceramic Sensor for Far-Field Temperature Measurement at High Temperatures.
- Authors
Tennant, Kevin M.; Jordan, Brian R.; Strader, Noah L.; Varadharajan Idhaiam, Kavin Sivaneri; Jerabek, Mark; Wilhelm, Jay; Reynolds, Daryl S.; Sabolsky, Edward M.
- Abstract
A passive wireless high-temperature sensor for far-field applications was developed for stable temperature sensing up to 1000 °C. The goal is to leverage the properties of electroceramic materials, including adequate electrical conductivity, high-temperature resilience, and chemical stability in harsh environments. Initial sensors were fabricated using Ag for operation to 600 °C to achieve a baseline understanding of temperature sensing principles using patch antenna designs. Fabrication then followed with higher temperature sensors made from (In, Sn) O2 (ITO) for evaluation up to 1000 °C. A patch antenna was modeled in ANSYS HFSS to operate in a high-frequency region (2.5–3.5 GHz) within a 50 × 50 mm2 confined geometric area using characteristic material properties. The sensor was fabricated on Al2O3 using screen printing methods and then sintered at 700 °C for Ag and 1200 °C for ITO in an ambient atmosphere. Sensors were evaluated at 600 °C for Ag and 1000 °C for ITO and analyzed at set interrogating distances up to 0.75 m using ultra-wideband slot antennas to collect scattering parameters. The sensitivity (average change in resonant frequency with respect to temperature) from 50 to 1000 °C was between 22 and 62 kHz/°C which decreased as interrogating distances reached 0.75 m.
- Subjects
PYROMETRY; SUBSTRATE integrated waveguides; SLOT antennas; TEMPERATURE sensors; ANTENNA design; ANTENNAS (Electronics); MICROSTRIP antennas; ULTRA-wideband antennas
- Publication
Sensors (14248220), 2024, Vol 24, Issue 5, p1407
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s24051407