新型半波长可调滤波器设计

一种新型半波长可调滤波器设计

内容简介：将Ba0．6 Sr0．4 TiO3（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7．8 GHz、带宽为1 GHz的带通可调滤波器。

Abstract：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.

作者：秦超, 谭宇, 王文君, 张洪波, 杨传仁, 张继华,

关键词：可调滤波器, Ba0.6 Sr0.4 TiO3 (BST)薄膜, 交叉耦合, 微带线, 半波长