BAND REJECTION FILTER AND BAND REJECTION FILTER CIRCUIT BY THE SAME

摘要

PURPOSE: A band rejection filter and a band rejection filter circuit by the same are provided to implement easy minute control of coupling by controlling the coupling between a transmission line and a resonator. CONSTITUTION: A housing(110) has a barrier rip(150) with a plurality of hollows(140). A housing cover(120) covers open one side of the housing. A resonator(160) is installed in the one side of hollow. A transmits line(130) maintains the interval from the resonator. A tuning bolt(170) changes the coupling between resonator and the transmits line.