JPS6197227U

JPS6197227U -

Info

Publication number: JPS6197227U
Application number: JP18288184U
Authority: JP
Priority date: 1984-11-30
Filing date: 1984-11-30
Publication date: 1986-06-21

Description

[Brief explanation of the drawing]

第１図はこの実施例を示す正面図である。第２
Ａ図および第２Ｂ図はこの実施例に用いられる圧
電フイルタエレメントの一例を示し、第２Ａ図は
その斜視図であり、第２Ｂ図はその背面図である
。第３図は周波数特性を示すグラフであり、実線
が第１図実施例の特性を示し、点線が従来例の特
性を示す。第４図は第１図実施例の変形例を示す
正面図である。第５図は第４図実施例の変形例を
示す正面図である。第６図はこの考案の他の実施
例を示す正面図である。図において、１０は圧電フイルタエレメント、
３２は絶縁基板、３４および３６は第１および第
２の導体、３８は共通導体、１００は圧電フイル
タを示す。 FIG. 1 is a front view showing this embodiment. Second
Figures A and 2B show an example of a piezoelectric filter element used in this embodiment, with Figure 2A being a perspective view thereof and Figure 2B being a rear view thereof. FIG. 3 is a graph showing frequency characteristics, where the solid line shows the characteristics of the embodiment in FIG. 1 and the dotted line shows the characteristics of the conventional example. FIG. 4 is a front view showing a modification of the embodiment of FIG. 1. FIG. 5 is a front view showing a modification of the embodiment shown in FIG. 4. FIG. 6 is a front view showing another embodiment of this invention. In the figure, 10 is a piezoelectric filter element;
32 is an insulating substrate, 34 and 36 are first and second conductors, 38 is a common conductor, and 100 is a piezoelectric filter.

Claims

[Claims for Utility Model Registration] 1. A piezoelectric filter in which a filter element is attached to an insulating substrate, wherein the insulating substrate has a first lead-out conductor formed at one end of one main surface thereof; a second lead-out conductor formed at the other end of the one main surface at a distance from the first lead-out conductor; and a second lead-out conductor and the second lead-out conductor formed on the one main surface. a common conductor formed between the filter element, a first filter portion connected to the first draw-out conductor, and a second filter portion connected to the second draw-out conductor. , and a common electrode formed on the back surface thereof and connected to the common conductor, the common conductor being formed to extend near between the input and output of the filter element. 2. The piezoelectric filter according to claim 1, wherein the common conductor is formed to completely cross the opposing portions of the first drawer conductor and the second drawer conductor.