一种用于GIS超高频检测的滤波器  

Bandpass Filter Used for PD UFH Detecting in GIS

作　　者：张晓星[1] 唐炬[1] 孙才新[1] 魏钢 

机构地区：[1]重庆大学高电压与电工新技术教育部重点实验室,重庆400030 [2]重庆电力公司重庆电力超高压局,重庆400030

出　　处：《高电压技术》2005年第8期27-29,53,共4页High Voltage Engineering

基　　金：国家自然科学基金资助项目(50377045)

摘　　要：为提高使用外置天线的GIS超高频检测系统的信噪比,设计了一种工作频带300～1-000-MHz的微带线带通滤波器.根据微带线滤波器设计原理,确定滤波器类型、结构和级数,利用先进的EDA仿真工具进行结构仿真和优化并提出了一种减小滤波器尺寸的方法.特性曲线和实测性能表明,该滤波放大器能抑制低频干扰信号,放大局放信号,提高信噪比,从而满足了UHF微弱信号滤波预处理要求.In order to improve the SNR of UFH PD detecting system using outer antenna in GIS, this paper designs a microstrip bandpass filter, whose work frequency band is 300～1000MHz. According to the microstrip filter design principle, the type, structure and optional series can be determined, then the structure simulation and optimization of filter are designed by using advanced EDA simulation tool, and a method of miniaturized microstrip filter is put forward. The results of performance test show that, it can suppress the low frequency noise, enlarge the PD signal and improve the SNR, so it can meet the pretreatment demand of UHF feeble PD signals.

关 键 词：微带线 带通滤波器 GIS 超高频监测 

分 类 号：TN713[电子电信—电路与系统]