用于抑制互调干扰的非对称双阻带滤波器
Asymmetric Double Stopband Filter for Suppressing Intermodulation Interference
DOI: 10.12677/IaE.2021.94014, PDF,   
作者: 郑建拥, 魏光辉：陆军工程大学石家庄校区，电磁环境效应国家重点实验室，河北 石家庄
关键词: 双阻带滤波；互调干扰抑制；干扰模型；Double Stopband Filter； Intermodulation Interference Suppression； Interference Model
摘要: 针对用频设备互调干扰的问题，提出了在高频段采用双阻带滤波器的抑制方法。依据前期建立的用频设备二阶互调干扰预测模型，利用谐振腔直接耦合技术，通过频率变换来设定滤波器的极点和零点位置的方法，直接设计符合干扰预测模型的双阻带滤波器。结果表明，按此方法设计的滤波器中间通带损耗仅为−0.42 dB，可以将互调干扰抑制40 dB。针对用频设备互调干扰的问题，提出了在高频段采用双阻带滤波器的抑制方法。依据前期建立的用频设备二阶互调干扰预测模型，利用谐振腔直接耦合技术，通过频率变换来设定滤波器的极点和零点位置的方法，直接设计符合干扰预测模型的双阻带滤波器。结果表明，按此方法设计的滤波器中间通带损耗仅为−0.42 dB，可以将互调干扰抑制40 dB。
Abstract: Aiming at the problem of intermodulation interference of frequency equipment, a method of suppressing the intermodulation interference by using double stopband filter in high frequency band was proposed. According to the second-order and third-order intermodulation interference prediction model of frequency equipment established in the early stage, the method of setting the pole and zero position of the filter by frequency transformation is used to design the double-stopband filter which accords with the interference prediction model directly. The intermediate passband loss of the filter designed by this method is only −0.42 dB, and the intermodulation interference can be suppressed at least 40 dB.
文章引用：郑建拥, 魏光辉. 用于抑制互调干扰的非对称双阻带滤波器[J]. 仪器与设备, 2021, 9(4): 89-95. https://doi.org/10.12677/IaE.2021.94014

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