| 摘要 |
PURPOSE:To accurately adjust response frequency characteristics over a large adjustment range irrespective of the shape of a filter by connecting open ends of respective resonance conductors to an earth conductor on an external surface by thin wires or allowing them to be approached and cutting the respective thin wires. CONSTITUTION:The strip line filter has the resonance conductors 3-5, which act as filters, formed on the top surface of one dielectric substrates 1 between two dielectric substrates 1 and 2 and the other dielectric substrate 2 is superposed and fixed by pressing; and the exposed thin wires 8-10 which connect the open ends of the respective resonance conductors 3-5 to the earth conductor 6 on the external surface of allow them to be approached are much thinner than the resonance conductors 3-5 and the response frequencies are determined almost by respective resonance conductor lengths. The frequency characteristics of the filter after the fixation are adjusted, for example, by partially grinding the thin wires 9 extending from the open ends of the resonance conductors 4 from outside the flank together with the earth conductor 6 formed on the peripheral flank of the dielectric substrate 1 by using a drill, etc. |
