| 摘要 |
A wireless temperature sensor based chip comprises: an interdigital transducer (1), reflecting gratings (2), and a piezoelectric substrate (3). The interdigital transducer (1) and the reflecting gratings (2) are disposed on the piezoelectric substrate (3). The reflecting gratings (2) are symmetrically disposed at two sides of the interdigital transducer (1). The interdigital transducer (1), the reflecting gratings (2), and the piezoelectric substrate (3) are disposed in a housing of the sensor. Strips of the interdigital transducer (1) vary from left to right in a grade-changing weighted manner, that is, an overlapped length between adjacent strips varies from left to right according to a cosine function. The reflecting gratings (2) use a lattice weighted manner, that is, lattice is disposed between strips of the reflecting gratings (2). The temperature sensor based chip requires no power supply and transmission lines, can implement temperature measurement in a harsh environment condition, and can achieve high measurement precision. |
