| 摘要 |
PURPOSE:To obtain an inexpensive, small-sized, and well-earthed filter by using a coupling substrate of a dielectric filter as an input terminal and bending a hole, through which this input terminal passes, to the outside of a filter case and using this bending part as the earth. CONSTITUTION:In the filter, three cylindrical hollow dielectric materials 6 are arranged, and pattern parts are provided by a print substrate 7 consisting of materials such as ''Teflon'' or the like, and coupling capacities of dielectric materials 6 are realized by their nearby pattern parts 8, and these pattern parts are extended to the outside of a case 1a by strip lines and are used as input/output terminals 2a and 3a, and they are led to the outside of the case 1a, and the filter is earthed by bending parts 10. Consequently, the coupling substrate is used as the input terminal also without an expensive connector or a through terminal of high frequency signals sealed up by insulating materials. |
