可调SIR腔体带阻滤波器设计

可调SIR腔体带阻滤波器设计

内容简介：提出了一种中心频率可调的阶跃阻抗谐振器（Step impedance resonator, SIR）腔体带阻滤波器，通过调谐螺杆的长度来灵活调谐中心谐振频率。仿真结果显示，该带阻滤波器中心频率调谐范围为1.5~2.05GHz。与传统的开路短截线带阻滤波器相比，实现了带阻滤波器中心频率的自由调谐，提高了带阻滤波器灵活性，并将寄生阻带精确推移到4倍阻带中心频率处，增加了上通带宽度。

Abstract：A kind of tunable step impedance resonator (SIR)cavity bandstop filter is propoesd. Center resonance frequency can be flexiblely tuned by changing length of the tunning screw. The simulation results show that tuning range of center frequency of the bandstop filter is 1.5-2.05GHz. Compared with the traditional open stub bandstop filter, tunable bandstop filter has freely tuning center frequency, improving the flexibility of band-stop filter. The parasitic stopband appear precisely at 4 times the stopband center frequency, broadening the width of up passband.

作者：王孝卫, 夏哲雷, 刘晓芳,

关键词：SIR腔体带阻滤波器, 调谐, 仿真, 设计