复杂电磁频谱环境中YIG调谐带阻滤波器干扰抑制技术

在复杂电磁频谱环境中,多个干扰信号并存时对整机系统接收灵敏度、动态范围等关键指标产生不可忽视的影响,严重时可造成接收饱和、信号阻塞及虚假响应。多级多通道YIG调谐带阻滤波器的陷波频率可调功能可有效抑制多个干扰信号,特别是干扰信号频率复杂多变的应用场合。以四通道双阻带变频组件为例,介绍多阻带YIG调谐带阻滤波器在接收通道中进行干扰信号抑制的解决方案,并提供测试结果,也为提升系统在复杂电磁频谱环境中的抗干扰能力提供了思路。

Interfernece suppression technology for complex electromagnetic spectrum environment based on YIG-tuned band-reject filter

In complex electromagnetic spectrum environment, the coexistence of multiple interference signals has important impact on the key specificat such as the receiving sensitivity and system dynamic range. In serious cases, it may cause the receiving saturation, signal blocking and receiver sham. The notch frequency tunable function of multi-stage and multi-channel YIG-tuned band-reject filters can effectively suppress multiple interference signals, especially when the frequency of interference signals frequency changeable. Taking the four-channel dual-stopband converter as an example, this paper introduces the solution of interference suppression in the receiving channel of multi-stopband YIG-tuned band-reject filter, and provides the test results, and also provides a train of thought for improving the anti-interference ability of the system in complex electromagnetic spectrum environment.