Distributed LPF in mobile communication system using single side radial stub and stage-by-stage microstrip line

摘要

PURPOSE: A distributed LPF is provided to achieve improved work efficiency of printed circuit board, while reducing the size of the filter. CONSTITUTION: A distributed LPF comprises a fan-shaped single side radial stub(100) for filtering the received signal in a broadband; and a stepped microstrip line(200) for filtering the received signal in a broadband, and which forms a -shape centering from the fan-shaped single side radial stub.