CAVITY BAND REJECTION FILTER

摘要

PURPOSE: A cavity band rejection filter is provided to improve reliability of the cavity band rejection filter by reducing an insertion loss and improving a standing-wave ratio in the cavity band rejection filter. CONSTITUTION: A cover portion is formed with a central line(90), a dielectric body(110), a plurality of holes(70), a control bar(80), and a waveguide(100). The central line(90) is used for transmitting an RF signal. The central line(90) is formed in the inside of the waveguide(100) fixed by the dielectric body(110). The control bar(80) is inserted into the holes(70). An upper plate(15) and a lower plate(17) are combined with the third screw(7). An open stub is adhered toward a cavity(40). An N type terminal(20) is fixed by a cover portion and the forth screw(8). The N type terminal(20) is electrically connected to the central line(90). A plurality of cavities(40) is formed on a main body portion. A cavity resonator(50) is fixed to the cavity(40) by the first screw.