S&M2972 Research Paper of Special Issue
Millimeter-wave Passive Patch Antenna for Use in Wireless High-temperature Sensor Ying-Ting Liao, Yih-Chien Chen, and Cheng-Chien Kuo
(Received December 30, 2021; Accepted April 20, 2022)
Keywords: millimeter wave, wireless sensor, passive antenna temperature sensor
We propose a passive patch antenna temperature sensor architecture consisting of a transceiver and a passive patch antenna temperature sensor made of RO3003 and Mg2SnO4 ceramic substrates, respectively. The millimeter dielectric properties of Mg2SnO4 ceramic were examined with a view to its use as a wireless high-temperature passive patch antenna temperature sensor. A dielectric constant of 3.97 and a loss factor of 5.42 × 10-2 were obtained for Mg2SnO4 ceramic sintered at 1550 C for 4 h. We report the development procedures and test results for a passive patch antenna temperature sensor. The resonating frequency and 3 dB bandwidth of the sensor measured at 25 C were 30.6210 GHz and 1530 MHz, respectively. The measurement resonant frequency decreased from 30.6210 to 30.3790 GHz when the operating temperature increased from 25 to 225 °C, which correspond to a sensitivity and linearity of −1.210 MHz/C and 0.06%, respectively.
Corresponding author: Yih-Chien Chen