| 摘要 |
PROBLEM TO BE SOLVED: To constitute a small-sized dielectric filter which can get enough coupling capacity. SOLUTION: Inner conductor forming holes 2a-2c, where inner conductors 3a-3c are made on the inner faces from one side to the other side opposed to this, are provided inside a dielectric block 1 roughly in the shape of a rectangular parallelepiped. Meantime, an outer conductor is made at the outer face of the dielectric block 1 excluding one open part of the inner conductor forming holes 2a-2c. A pair of input/output electrodes 6 respectively coupled with the inner conductors 3a and 3c are made from the end face in the direction of disposition of these inner conductor forming holes 2a-2c to the bottom face to serve as a mounting face. Moreover, gaps 71 and 72 are provided, respectively, at the inner faces of the inner conductor forming holes 2a and 2c, and electrodes 81 and 82 for coupling are made apart from the inner conductors 3a and 3c. Electrodes 5ab and 5bc for connection, which lead to the inner conductor 3g and are in specified form from the open end of the inner conductor forming hole 2b to electrodes 81 and 82 for coupling, are made at the open end face of the inner conductor in the dielectric block 1.
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