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Love wave devices with excellent temperature stability for application in gas sensor

The temperature property of Love wave device for application in gas sensor was analyzed theoretically by solving the coupled electromechanical field equation, and the optimal design parameters were extraction, leading to excellent temperature stability. Low temperature coefficient of the fabricated Love wave delay lines with guide layer of SU-8 on ST-90°X quartz substrate is achieved experimentally as only -4.4 ppm/°C, which agrees well with the calculated results.