| 摘要 |
A dielectric filter comprises a first resonator 4a and second resonator 46. Each of the resonators includes a dielectric block 5 having a through-hole 6, an inner conductive layer 7 placed on the inner surface of the through-hole, and an outer conductive layer 8 placed on the outer surface of the dielectric blocks. The first and second resonators have a coupling hole 10 extending transversely to the through-holes in portions of the resonator couples adjacent to each other. The dielectric filter may further include a frame 12 made of a pair of metal plates covering said coupling hole. The pair of metal plates have legs 13 for earthing and are affixed to the filter body, whereupon the metal plates are located, apart form each other. A method for producing a dielectric filter comprises the steps of making a filter body by connecting a first resonator and second resonator; providing a pair of lead frames incorporating a plurality of metal plates; disposing said filter body between said metal plates of the pair of lead frames; and fixing the metal plates to opposite sides of the filter body. Different shaped coupling faces of the dielectric blocks are described Figs 4A-4D. <IMAGE> |
