一种新型声表面波振荡器系统的设计研究  

Study on Design of Novel Surface Acoustic Wave Oscillator System

作　　者：文常保[1] 方吉善 巨永锋[1] 

机构地区：[1]长安大学电子与控制工程学院/微纳电子研究所,西安710064

出　　处：《电子器件》2014年第2期240-244,共5页Chinese Journal of Electron Devices

基　　金：国家自然科学基金项目(60806043);中央高校基本科研业务费专项资金项目(2013G3322010)

摘　　要：针对振荡器中声表面波器件存在的体声波干扰、电极反射及旁瓣过大问题,提出了一种新型声表面波振荡器系统的设计方案。该方案将多条耦合器用于分离体声波,分裂电极用于减弱电极反射问题,并采用了输入、输出换能器双加权的措施来降低旁瓣信号。通过对一个中心频率为50.8MHz声表面波振荡器的实现和测试,得到该新型声表面波振荡器系统的振荡频率为50.613 MHz,与系统的设计值误差仅为3.6‰,并且具有良好的周期性和稳定性。In order to solve the bulk acoustic wave（ BAW） interference,the electrodes reflection and high side lobe in the acoustic surface wave（ SAW） device of SAW oscillator system,the novel SAW oscillator system is proposed. In this design scheme,the BAW is separated by the multi-strip coupler,and the electrodes reflection and the side lobe are suppressed by the split electrode and weighted input and output input interdigital transducers,separately. The realization and measurement results of the novel SAW oscillator system with center frequency at 50. 8 MHz conform that the frequency of the oscillator signal is 50. 613 MHz,and the frequency error between the actual measurement and theoretical design is only 3. 6‰. Furthermore,the SAW oscillator system has good periodicity and stability.

关 键 词：声表面波器件 声表面波振荡器 体声波 电极反射 旁瓣 

分 类 号：TN65[电子电信—电路与系统] TN752