一种新型半波长可调滤波器设计  

Design on a New Type of Half-wavelength Tunable Filter

作　　者：秦超[1] 谭宇[1] 王文君[1] 张洪波[1] 杨传仁[1] 张继华[1] 

机构地区：[1]电子科技大学薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《压电与声光》2014年第3期366-368,372,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(51172035)

摘　　要：将Ba0.6Sr0.4TiO3(BST)铁电薄膜应用于微带电路中,采用高频仿真软件(HFSS)双模法提取耦合系数,快速设计了λ/2(λ为波长)可调滤波器。针对电路中偏压隔离部分设计了用于谐振器间的高阻偏压连线和λ/4接地线,使滤波器能采用端口加压的方式调谐,简化了调谐方式。最终设计了中心频率为7.8GHz、带宽为1GHz的带通可调滤波器。Ba0.6 Sr0.4 TiO3 （BST）ferroelectric film was applied in micro-strip circuit. A half-wavelength tunable band-pass filter was designed quickly by HFSS dual-mode method to extract the coupling coefficients. Considering the voltage isolation of DC signal bias in the circuit, a high resistance line connecting line and a grounding wire of 1/4 wavelength was designed between the resonators. The filter tuning was simplified with dc voltage processing at port. The band-pass tunable filter was finally designed with the features of 7.8 GHz center frequency and 1 GHz bandwidth.

关 键 词：可调滤波器 BA0 6Sr0 4TiO3(BST)薄膜 交叉耦合 微带线 半波长 

分 类 号：TN384[电子电信—物理电子学]