基于复合左右手传输线的原理,设计了一款新型超宽带滤波器,结构简单且尺寸只有0.5 cm×1.5 cm,左手电容是由微带线结构耦合形成,左手电感由接地短截线形成。通过仿真结果与实物测试可知超宽带滤波器的带宽为3.3~10.2 GHz,插入损耗小于1 dB,回波损耗小于–12.5 dB。该滤波器可用于超宽带无线通信系统中。 Based on the principle of composite left and right hand transmission line, a new type of ultra-wideband filter is designed. The structure is simple and the size is only 0.5 cm × 1.5 cm. The left hand capacitor is formed by the coupling of microstrip line and the left hand inductor is formed by the grounding stub. The simulation results and physical tests show that the bandwidth of the UWB filter is 3.3 ~ 10.2 GHz, the insertion loss is less than 1 dB, and the return loss is less than -12.5 dB. The filter can be used in ultra-wideband wireless communication systems.