一种窄带SIR带阻滤波器的设计  

Design of Narrow-band Bandstop Filter Using Stepped-impedance Resonator

作　　者：宋加兴[1] 王锡良[1] 游鑫[1] 

机构地区：[1]电子科技大学电子工程学院,四川成都610054

出　　处：《压电与声光》2013年第5期752-755,共4页Piezoelectrics & Acoustooptics

摘　　要：介绍了嵌入式并联λg/4(λg为波长)的开路支节的基本结构与特性。采用带状线,设计了一款中心频率为2.46GHz、阻带宽度50MHz、最大阻带衰减为60dB的三阶嵌入式并联开路支节窄带带阻滤波器。与传统的并联开路支节带阻滤波器相比,嵌入式并联开路支节带阻滤波器的横向尺寸减小,结构紧凑。采用阶梯阻抗谐振器(SIR)结构,按相同指标设计了一款三阶嵌入式SIR窄带带阻滤波器。与嵌入式并联开路支节带阻滤波器相比,嵌入式SIR带阻滤波器结构更为紧凑,纵向尺寸缩小约17.5%,并具有更好的谐波抑制特性。Embedded parallel λ/4（λ is the wavelength） open stub structure and its band-stop properties were presented. Embedded open stub structure was applied to design a 3-order narrow-band strip-line band-stop filter, which had the center frequency of 2.46 GHz, the stop-band bandwidth of 50 MHz and the maximum elimination up to 60 dB. Compared with the traditional band-stop filter with open-circuited stubs, embedded open stub band-stop filter was more compact in lateral dimension. Based on stepped-impedance resonator （SIR） structure, another com- pact strip-line band-stop filter with the same target was designed. Compared with embedded open stub band-stop fil- ter, the longitudinal size of the embedded SIR band-stop filter was reduced by about 17.5% with better harmonic suppression characteristics.

关 键 词：嵌入式并联开路支节 阶梯阻抗谐振器 窄带 带阻滤波器 

分 类 号：TN713[电子电信—电路与系统]