带陷波特性的多模谐振超宽带滤波器设计

Design of Small Ultra-wideband Bandpass Filter Using Multiple-mode Resonator with Notched Band

超宽带的频段是在3.1～10.6 GHz,中心频率是6.85 GHz。无线局域网的工作频段为5.2 GHz和5.8 GHz,其与超宽带频段产生了冲突,会对超宽带系统形成干扰。在多模谐振超宽带滤波器的基础上,加入开路支节,设计了具有陷波特性的滤波器,可以消除无线网络的干扰。仿真结果表明,该滤波器在超宽带频段内屏蔽掉了无线局域网的频段,实现了滤波器的陷波功能,使滤波器获得了较好的抗干扰能力。

The frequency band of ultra-wideband （UWB） is 3.1 - 10.6 GHz, whose center frequency is 6.85 GHz. The operating frequency range of Wireless Local Area Network （WLAN） includes 5.2 GHz and 5.8 GHz two parts, which has a conflict with UWB system. Based on the multiple-mode filter structure, the filter with characteristic of rejeetion is designed by adding two pieces of open-load, which can eliminate the interference of WLAN. The results of simulating show that the filter has good performance with rejection in the frequency range of WLAN. The notched function is attained so that the filter has good anti-jamming capability.