MICROSTRIP DUAL-BAND BANDPASS FILTER USING STEPPED IMPEDANCE RESONATOR

摘要

PURPOSE: A microstrip dual band bandpass filter using a stepped impedance resonator is provided to prevent resonators from being combined by differently setting a resonant frequency and a harmonic frequency. CONSTITUTION: A first feed line(110) has a stepped impedance resonator structure. One end of the first feed line is opened. One end of a second feed line(120) which is opposite to the first feed line is opened. First and second resonators(130) form a first pass band. Third and fourth resonators(140) form a second pass band.