JPS6323803U

JPS6323803U -

Info

Publication number: JPS6323803U
Application number: JP11825886U
Authority: JP
Priority date: 1986-07-30
Filing date: 1986-07-30
Publication date: 1988-02-17

Description

【図面の簡単な説明】第１図は本考案に係る誘電体フイルタの断面図
、第２図は同じくその底面図、第３図は同じくそ
の動作を説明するための周波数減衰特性図、第４
図は従来の誘電体フイルタの断面図、第５図は同
じくその電気的等価回路図である。Ａ……バンドパスフイルタ、Ｂ……高調波帯域
阻止フイルタ、６……誘電体磁器、７１〜７３…
…貫通孔、８１〜８４……導電膜、Ｇ……ギヤツ
プ。[Brief Description of the Drawings] Figure 1 is a cross-sectional view of the dielectric filter according to the present invention, Figure 2 is a bottom view thereof, Figure 3 is a frequency attenuation characteristic diagram for explaining its operation, and Figure 4 is a diagram of its frequency attenuation characteristics.
The figure is a sectional view of a conventional dielectric filter, and FIG. 5 is an electrical equivalent circuit diagram thereof. A...Band pass filter, B...Harmonic band rejection filter, 6...Dielectric ceramic, 71-73...
...Through hole, 81-84...Conductive film, G...Gap.

Claims

[Scope of Claim for Utility Model Registration] (1) A through hole is provided in dielectric porcelain, and one side of both surfaces with the through hole open is an open end surface, and a conductive film is provided on the outer surface other than the open end surface and the inner peripheral surface of the through hole. A conductive film is formed on the outer surface other than the open end surface and the inner circumferential surface of the through hole, and a conductive film is formed on the outer surface excluding the open end surface and the inner peripheral surface of the through hole. 1. A dielectric filter comprising a harmonic band rejection filter in which a conductive film formed on the inner peripheral surface of a hole and a conductive film formed on the outer surface of a dielectric ceramic are insulated by a gap. (2) The dielectric filter according to claim 1, wherein the gap is formed on an end surface opposite to the open end surface. (3) According to claim 2 of the utility model registration claim, the gap is formed by removing the boundary between the outer surface of the dielectric ceramic and the inner peripheral surface of the through hole. The dielectric filter described. (4) Claim 1 of the utility model registration claim, characterized in that the band pass filter and the harmonic band rejection filter share dielectric ceramic;
The dielectric filter according to item 2 or 3. (5) The dielectric filter according to claim 1, 2, 3, or 4, wherein the bandpass filter has a plurality of through holes. (6) The bandpass filter includes a coupling capacitor that is electrically connected to a conductive film formed on the inner peripheral surface of the through hole. 5. The dielectric filter according to item 4, item 5, or item 5. (7) Utility model registration claims 1, 2, 3, and 4, characterized in that the harmonic band rejection filter has one or more through holes.
6. The dielectric filter according to item 5 or 6. (8) The harmonic band rejection filter is characterized in that external wiring is connected to a conductive film formed on the inner peripheral surface of the through hole. The dielectric filter according to item 3, 4, 5, 6, or 7.