| 摘要 |
<p>A microwave device comprises, for example, an interdigital bandpass filter in which a block (10) of a dielectric material is shaped and drilled with a line of parallel holes (19-23) to define the physical configuration of an interdigital filter in which conductive platings on the walls of the drilled holes comprise resonator rods within a microwave cavity formed by conductive platings (11, 12, 13, 16-18) on exterior surfaces of the block. Coating material is removed from end portions of the rods formed by the coated holes in order to fine-tune the filter to a desired center frequency in the band of operation.</p> |
