中文摘要：

射频（RF）滤波器在4G移动通信（如Band 40波段）中具有广泛应用。描述了基于薄膜体声波谐振器（FBAR）技术的RF滤波器的设计和制作方法。体声波滤波器是由FBAR以T型结构级联的方式实现的。在滤波器的设计过程中,为了使仿真结果更接近于实际情况,采用考虑电极和衬底间耦合效应的改进的Mason模型对FBAR进行性能仿真和优化。最后,在8英寸（1英寸=2.54 cm）CMOS工艺线上对此滤波器进行了流片。测试结果表明,Band 40波段的体声波滤波器具有低的通带插入损耗（小于3 dB）、高的带外抑制（大于40 dB）和快速滚降特性。

英文摘要：

The radio frequency（RF）filter can be widely used in the 4G mobile communication（such as Band40）.A RF filter based on the film bulk acoustic resonator（FBAR）technology was designed and fabricated.The bulk acoustic wave filter was composed of a group of FBARs connected in T-type structure.In order to improve the accuracy of simulation result,an improved Mason model was introduced to simulate and optimize the FBAR by considering the coupling effect between electrode and substrate.The filter was fabricated by the 8-inch（1inch=2.54 cm）CMOS process.The test results show that the bulk acoustic wave filter for Band40 has low passband insertion loss（less than 3 dB）,high out-of-band rejection（greater than 40 dB）and fast roll-off characteristic.