- TRIPLE-BAND BANDPASS FILTER USING TRIPLE-MODE STUB-LOADED STEP IMPEDANCE RESONATOR

摘要

A triple bandpass filter using a triple mode resonator according to an embodiment of the present invention is a triple bandpass filter including two triple mode resonators and having three frequency passbands, The first stepped stub of the first stepped stub is connected to the inner side of the first stepped stub so as to be disposed in the opened inner space of the first stepped stub, A first triple mode resonator including first and second open ended stubs forming a symmetrical structure and a first input / output stub connected to an outer side of the first stepped stub, and a first triple mode resonator having the same shape as the first triple mode resonator, A second triple mode resonator that can be formed by rotating the first triple mode resonator 180 degrees about a center point, Triple-band pass filter, comprising: may include those formed from a planar layout structure of the microstrip line on one substrate.