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- W4308325058 abstract "Low temperature measurement is crucial in deep space exploration. Surface acoustic wave (SAW) sensors can measure temperature wirelessly, making them ideal in extreme situations when wired sensors are not applicable. In this study, 128° YX LiNbO3 was first introduced into low temperature measurements for its little creep or hysteresis in cryogenic environments and affordable price. The finite element method was utilized to raise the design efficiency and optimize the performance of SAW sensors by comparing the performance with different interdigital transducer (IDT) structure parameters, including the height of electrodes, pairs of IDTs, reflecting grid logarithm and acoustic aperture. Once the parameters were changed, a novel design of high-performance SAW temperature sensors based on 128° YX LiNbO3 with double electrode transducers was obtained, of which the Q value could reach up to 5757.18, 4.2-times higher than originally reported. Low temperature tests were conducted, and the frequency responsiveness of SAW sensors was almost linear from −100 °C to 150 °C, which is in good agreement with the simulation results. All results demonstrate that double electrode transducers are considerably efficient for performance enhancement, especially for high-Q SAW sensors, and indicate that LiNbO3 substrate can be a potential high-performance substitute for cryogenic temperature measurements." @default.
- W4308325058 created "2022-11-11" @default.
- W4308325058 creator A5032837517 @default.
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- W4308325058 date "2022-11-04" @default.
- W4308325058 modified "2023-10-18" @default.
- W4308325058 title "High-Performance SAW Low Temperature Sensors with Double Electrode Transducers Based on 128° YX LiNbO3" @default.
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- W4308325058 doi "https://doi.org/10.3390/mi13111912" @default.
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