| 摘要 |
PROBLEM TO BE SOLVED: To provide a multi-mode resonator that has degenerated four resonant modes, and is high in utilization efficiency of an occupied space, but does not necessarily require a dielectric member.SOLUTION: A multi-mode resonator 1 is a multi-mode resonator which has degenerated four resonant modes, and comprises a box-shaped outer conductor 2 of which both ends of a cylindrical peripheral wall 2c are blocked by a first end part 2a and a second end part 2b; a columnar first central conductor 3 which is disposed inside the outer conductor 2 and its one end 3a is short circuited with the first end part 2a of the outer conductor 2 and its other end 3b is opened; a columnar second central conductor 4 which is disposed inside the outer conductor 2 and its one end 4a is short circuited with the second end part 2b of the outer conductor 2 and its other end 4b is opened. The four resonant modes include two TEM modes and two TE modes, and the length in the longer direction of the first central conductor 3 and the second central conductor 4 is almost the same. |
