中文摘要：

介绍了一种基于声表面波谐振器的无源无线温度传感系统，系统采用一次变频的构成方式，解决了传统传感系统存在电路结构复杂和控制灵活性差的缺点，给出了系统的具体构成、工作原理和天线的设计。与传统系统构成相比，本系统的构成更简洁，操作性和灵活性更强。实验验证了本系统构成方式的可行性和天线设计的优点。

英文摘要：

A passive wireless temperature sensing system using a surface acoustic wave resonator is described. First-conversion is adopted in the system,which resolved the shortcoming of complexity of circuit and deficiency of controllability the traditional sensing systems, and the design and operating principle of the system are also presented with the design of antenna. Compared with traditional systems, the system shows the advantages of concision, maneuverability and agility. Experiment certifies feasibility of the composing of the system and merit of the antenna.