Acoustic surface wave resonator having high Q value and one port applied to wireless temperature sensor

The invention discloses an acoustic surface wave resonator having high Q value and one port applied to a wireless temperature sensor. The acoustic surface wave resonator comprises an interdigital transducer, two reflectors and a piezoelectric substrate, wherein the two reflectors are respectively distributed at two sides of the interdigital transducer; the interdigital transducer is arranged on the piezoelectric substrate in a manner of withdrawing and weighting a cosine function; and the two reflectors are arranged on the piezoelectric substrate in the form of a groove. The piezoelectric substrate is a quartz crystal, which is rotatably cut in 0-30-degree around a Y axis and transmitted along the X direction; the interdigital transducer is an aluminium electrode, the duty ratio of which is 1.3-1.5; the performances of small volume, high Q value, low loss, low parasitism and the like can be realized; the Q value is increased; loss of devices is reduced; and the acoustic surface wave resonator has high practicability.