JPH0356204U

JPH0356204U -

Info

Publication number: JPH0356204U
Application number: JP11752089U
Authority: JP
Priority date: 1989-10-05
Filing date: 1989-10-05
Publication date: 1991-05-30

Description

[Brief explanation of drawings]

第１図は本考案の誘電体フイルタを構成する誘
電体共振器の一例を示す斜視図、第２図は第１図
の誘電体共振器を用いて構成された３段型誘電体
フイルタの斜視図、第３図および第４図は本考案
による４段型誘電体フイルタおよび５段型誘電体
フイルタの平面図、第５図および第６図は結合部
のスリツト幅に広い部分と狭い部分を形成した実
施例を示す平面図、第７図は各実施例の有極特性
を示す特性線図、第８図および第９図は高さ寸法
の異なる複数の誘電体ブロツクによつて構成され
る誘電体フイルタの異なる実施例を示す斜視図、
第１０図は第８図の実施例の誘電体フイルタに対
する変形実施例を示す斜視図、第１１図は従来の
誘電体フイルタの分解斜視図、第１２図は高域側
に有極特性を持たせた例を示す特性線図、第１３
図は低域側に有極特性を持たせた例を示す特性線
図である。１０…誘電体共振器、１０Ａ，１０Ｂ，１０Ｃ
，１０Ｄ，１０Ｅ…誘電体共振器、１１…誘電体
ブロツク、１２…共振子孔、１４…開放面、１６
…短絡面、１８，１８ａ，１８ｂ，１８ｃ，１８
ｄ，２２，２４…結合部。 Fig. 1 is a perspective view showing an example of a dielectric resonator constituting the dielectric filter of the present invention, and Fig. 2 is a perspective view of a three-stage dielectric filter constructed using the dielectric resonator of Fig. 1. 3 and 4 are plan views of a four-stage dielectric filter and a five-stage dielectric filter according to the present invention, and FIGS. 5 and 6 show wide and narrow portions of the slit width of the coupling portion. A plan view showing the formed examples, FIG. 7 is a characteristic diagram showing the polar characteristics of each example, and FIGS. 8 and 9 are composed of a plurality of dielectric blocks having different height dimensions. A perspective view showing different embodiments of a dielectric filter,
Fig. 10 is a perspective view showing a modified example of the dielectric filter of the embodiment shown in Fig. 8, Fig. 11 is an exploded perspective view of a conventional dielectric filter, and Fig. 12 has polar characteristics on the high frequency side. Characteristic diagram showing an example of
The figure is a characteristic diagram showing an example in which polar characteristics are provided on the low frequency side. 10...Dielectric resonator, 10A, 10B, 10C
, 10D, 10E...Dielectric resonator, 11...Dielectric block, 12...Resonator hole, 14...Open surface, 16
...Short circuit surface, 18, 18a, 18b, 18c, 18
d, 22, 24... joint portion.

Claims

[Claims for Utility Model Registration] A resonator hole is formed in a dielectric block, penetrating from one end surface to the other end surface, the one end surface is formed with a conductive layer and serves as a short-circuit surface, and the other end surface is formed with no conductive layer. A conductive layer is formed on each side surface and the inner surface of the resonator hole to be electrically conductive to each other via the short-circuit surface, and at least one side surface is at least partially formed as an exposed surface on which no conductive layer is formed. In a dielectric filter in which a plurality of dielectric resonators serving as coupling parts are arranged side by side so that the coupling parts face each other, the coupling part has a dielectric layer at both ends thereof and extends from the open surface to the short-circuit surface. A dielectric filter characterized by being formed into a slit shape.