JPS61139015U

JPS61139015U -

Info

Publication number: JPS61139015U
Application number: JP2054885U
Authority: JP
Priority date: 1985-02-18
Filing date: 1985-02-18
Publication date: 1986-08-28

Description

[Brief explanation of the drawing]

第１図は、この考案に係る弾性表面波フイルタ
の一実施例を示す構成図、第２図は、この考案に
係る弾性表面波フイルタの他の実施例を示す構成
図、第３図は、従来のこの種の弾性表面波フイル
タの構成図である。図において、１は圧電体基板、２Ａ〜２Ｆは入
力側すだれ状電極、３Ａ〜３Ｄは出力側すだれ状
電極、４は入力側端子、５は出力側端子である。
なお、各図中、同一符号は同一又は相当部分を示
す。 FIG. 1 is a block diagram showing one embodiment of the surface acoustic wave filter according to this invention, FIG. 2 is a block diagram showing another embodiment of the surface acoustic wave filter according to this invention, and FIG. FIG. 1 is a configuration diagram of a conventional surface acoustic wave filter of this type. In the figure, 1 is a piezoelectric substrate, 2A to 2F are input side interdigital electrodes, 3A to 3D are output side interdigital electrodes, 4 is an input side terminal, and 5 is an output side terminal.
In each figure, the same reference numerals indicate the same or equivalent parts.

Claims

[Claims for Utility Model Registration] (1) An elastic device in which a plurality of input-side interdigital electrodes and a plurality of output-side interdigital electrodes are arranged alternately along the propagation direction of surface acoustic waves on a piezoelectric substrate. The surface wave filter is characterized in that at least some of the plurality of input side interdigital electrodes and at least some of the plurality of output side interdigital electrodes have different shapes. Surface acoustic wave filter. (2) Utility model registration claim No. 1, characterized in that at least one of the parameters related to the shape of the input-side interdigital electrode and the output-side interdigital electrode, such as the arrangement pitch, number, and crossing width of the electrode fingers, is different. The surface acoustic wave filter according to item 1. (3) A surface acoustic wave filter according to claim 2 of the utility model registration claim, characterized in that the arrangement pitches of the electrode fingers of the plurality of input-side interdigital electrodes and the plurality of output-side interdigital electrodes are different. . (4) The surface acoustic wave filter according to claim 2, wherein the plurality of input-side interdigital electrodes and the plurality of output-side interdigital electrodes have different numbers of electrode fingers. (5) A surface acoustic wave filter according to claim 2 of the utility model registration claim, characterized in that the interdigitated widths of the electrode fingers of the plurality of input-side interdigitated electrodes and the plurality of output-side interdigitated electrodes are different. . (6) A claim for utility model registration characterized in that the number of electrode fingers of a plurality of input-side interdigital electrodes is different, and the crossing width of the electrode fingers of a plurality of output-side interdigital electrodes is different. 2. The surface acoustic wave filter according to item 2.