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Development of the 400MHz Power Durable SAW Filter

机译:开发400MHz功率耐用的SAW滤波器

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摘要

Rapid development of wireless communication system requires high frequency and high power surface acoustic wave (SAW) filter. For SAW RF MEMS devices on diamond film, they have higher working frequency and more power endurance. A SAW RF MEMS filters on diamond film is designed. Its center frequency is 400MHz, and the line width of its Inter Digital Transducer (IDT) is 5μm. The diamond film on silicon substrate is customized by the CAEP ultra-hard material Co. 2μm thick ZnO piezoelectric film is deposited on diamond film by RF sputtering method. XRD analysis shows that the ZnO film has good C-axis orientation. IDT is fabricated by lift-off process. With delicate process control, designed delicate IDT pattern is acquired. The SAW RF MEMS filter prototype is finally packaged and tested. Its measured center frequency is about 378MHz, with insertion loss of 15.99dB.
机译:无线通信系统的飞速发展需要高频大功率表面声波(SAW)滤波器。对于金刚石薄膜上的SAW RF MEMS器件,它们具有更高的工作频率和更大的功率承受能力。设计了金刚石膜上的SAW RF MEMS滤波器。它的中心频率为400MHz,其Inter Digital Transducer(IDT)的线宽为5μm。硅基板上的金刚石膜是由CAEP超硬材料公司定制的。通过RF溅射法在金刚石膜上沉积2μm厚的ZnO压电膜。 XRD分析表明,ZnO薄膜具有良好的C轴取向。 IDT是通过剥离工艺制造的。通过精细的过程控制,可以获得精心设计的IDT模式。 SAW RF MEMS滤波器原型最终经过封装和测试。其测得的中心频率约为378MHz,插入损耗为15.99dB。

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