2014
DOI: 10.3390/s140304154
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A Harsh Environment-Oriented Wireless Passive Temperature Sensor Realized by LTCC Technology

Abstract: Abstract:To meet measurement needs in harsh environments, such as high temperature and rotating applications, a wireless passive Low Temperature Co-fired Ceramics (LTCC) temperature sensor based on ferroelectric dielectric material is presented in this paper. As a LC circuit which consists of electrically connected temperature sensitive capacitor and invariable planar spiral inductor, the sensor has its resonant frequency shift with the variation in temperature. Within near-filed coupling distance, the variati… Show more

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Cited by 49 publications
(45 citation statements)
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“…LC sensors were shown previously in lterature to be used as passive wireless sensors at high temperatures, but stability issues with the conductive material still needs to be addressed. The sensors reported in the literature are predominantly fabricated by depositing precious metals such as silver or platinum on ceramic substrate by thick film technology [8][9][10][11][12][13][14]. For example, the sensor presented by E. Birdsell was fabricated from platinum (Pt) onto a ceramic substrate [6].…”
Section: Introductionmentioning
confidence: 99%
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“…LC sensors were shown previously in lterature to be used as passive wireless sensors at high temperatures, but stability issues with the conductive material still needs to be addressed. The sensors reported in the literature are predominantly fabricated by depositing precious metals such as silver or platinum on ceramic substrate by thick film technology [8][9][10][11][12][13][14]. For example, the sensor presented by E. Birdsell was fabricated from platinum (Pt) onto a ceramic substrate [6].…”
Section: Introductionmentioning
confidence: 99%
“…As with the E. Birdsell work, the dimensions of the reported sensors are large (again, >3 inch in minimum dimension) to integrate with sophisticated systems, such a fuel cell, gasifier, turbine blades, and other micro high temperature systems [6]. An alternate fabrication approach is needed in order to miniaturize the dimension of the sensors to overcome the geometric constraints of the current fabrication approach [8][9][10][11][12][13][14].…”
Section: Introductionmentioning
confidence: 99%
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“…Wireless passive sensors are promising in harsh environments because they implement battery-free and contactless measurements. Currently, a wireless passive temperature sensor based on inductive-capacitive (LC) resonance could work at 800 °C using high-temperature co-fired ceramic techniques, but the LC lumped circuit suffers from the disadvantage of having a low quality factor and cannot approach the metal material characteristics, which affects the sensing distance and applications [7,8]. Wireless surface acoustic wave temperature sensors could work up to 900 °C, but chemical instabilities in the piezoelectric substrate at high temperatures limit their use in harsh-environment applications [9,10,11].…”
Section: Introductionmentioning
confidence: 99%
“…The sensor can wirelessly detect temperature parameters in harsh environments. However, the sensor can only operate up to 700°C [12].…”
mentioning
confidence: 99%