为实现对电力设备接点的测温,设计了基于声表面波的无源无线温度传感器的测温方案,具体研究其天线设计以及天线和传感器的匹配方法.方案中读写器天线采用平面倒F天线,传感器天线采用法向模螺旋天线.通过仿真分析和优化设计使得两款天线的谐振频率均为915 MHz,驻波比均小于1.5,达到了系统要求.通过改变馈点位置实现了平面倒F天线的匹配,法向模螺旋天线的匹配采用了Smith v2.0软件,最终两款天线的阻抗均为50 Ω.%In order to measure the junction temperature of power equipment, a novel strategy of temperature measurement based on surface acoustic wave passive wireless temperature sensor is designed. The antennas and the matching methods of antennas and sensors are also discussed. In the design, the reader antenna is designed as the planar inverted-F antenna, and the sensor antenna is designed as the normal mode helical antenna. By simulation analysis and optimization design, the center frequency of the antennas both are 915 MHz and the voltage standing wave ratio are less than 1.5, meeting the system requirements. The matching method of the planar inverted-F antenna is obtained through the location change of the feed point. The smith v2.0 is utilized to match the normal mode helical antenna. Finally, both antenna designs meet the requirements with the impedances of about 50 Ω.
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