Band elimination filter with loaded open-circuit stub

The invention provides an open-circuit stub loaded band elimination filter. Belongs to the technical field of radio-frequency microwave communication. The band elimination filter comprises an input end feeder line, an output end feeder line, a first open circuit stub line, a first signal transmission line, a second signal transmission line and a second open circuit stub line. According to the open-circuit stub loaded band-stop filter designed by the invention, the open-circuit stub is loaded between the quarter-wavelength transmission line and the three-quarter-wavelength transmission line, so that three transmission zero points are generated for a stop band, four transmission poles are also generated at passbands on two sides of the stop band, and an excellent roll-off characteristic is provided for the filter; moreover, the topological structure is simple, is easy to manufacture, and can be suitable for various communication systems. 本发明提出开路短截线加载的带阻滤波器。属于射频微波通信技术领域。所述带阻滤波器包括输入端馈线、输出端馈线、第一开路短截线、第一信号传输线、第二信号传