LOW PASS FILTER WITH VARIABLE RESONATOR FOR HARMONIC REJECTION AND MUTIPLE-BAND PASS FILTER WITH IT

摘要

PURPOSE: A low pass filter comprising a variable resonator for removing harmonics and a multi band pass filter comprising the low pass filter are provided to prevent frequency interference, by removing harmonic components from a desired frequency band. CONSTITUTION: An input port (104) is installed at both sides of a housing. An output port (106) is installed at both sides of the housing. A low pass filter part is electrically connected to the input port. A variable resonator part (120) comprises a plurality of variable resonators. The variable resonators remove harmonic components of a frequency signal. [Reference numerals] (110) LPF unit; (120) Variable resonator part