JPS6428023U

JPS6428023U -

Info

Publication number: JPS6428023U
Application number: JP12272387U
Authority: JP
Priority date: 1987-08-11
Filing date: 1987-08-11
Publication date: 1989-02-17
Anticipated expiration: 2002-08-11
Also published as: JP2516166Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例による共振器の構
造図、第２図はこの考案に係る共振器の特性図例
、第３図は従来のこの種の共振器の構造図、第４
図は従来のこの種の共振器の特性図例である。図
中、１はすだれ状電極、２は反射器、３は圧電体
基板、４は反射器２を構成するストリツプあるい
は溝、５はリード線である。なお、図中同一符号
は同一、又は相当部分を示す。 Fig. 1 is a structural diagram of a resonator according to an embodiment of this invention, Fig. 2 is an example of a characteristic diagram of a resonator according to this invention, Fig. 3 is a structural diagram of a conventional resonator of this type, and Fig. 4 is a structural diagram of a resonator according to an embodiment of this invention.
The figure is an example of a characteristic diagram of a conventional resonator of this type. In the figure, 1 is an interdigital electrode, 2 is a reflector, 3 is a piezoelectric substrate, 4 is a strip or groove constituting the reflector 2, and 5 is a lead wire. Note that the same reference numerals in the figures indicate the same or equivalent parts.

補正昭６２．１１．１１実用新案登録請求の範囲を次のように補正する
。Amendment November 11, 1986 The scope of claims for utility model registration is amended as follows.

【実用新案登録請求の範囲】圧電体基板上に弾性表面波を励振するすだれ状
電極と、弾性表面波を受信するすだれ状電極を設
け、その両側にストリツプあるいは溝を周期的に
配列してなる弾性表面波の反射器を配してなる共
振器において、上記すだれ状電極間の距離を約８
分の１波長と半波長の整数倍との和で与えられる
距離とし、また上記すだれ状電極と上記反射器間
の距離を、上記反射器の反射係数の位相が０度の
場合には、約８分の３波長と半波長の整数倍との
和で与えられる距離とし、一方上記位相が１８０
度の場合には、約４分の１波長と半波長の整数倍
との和で与えられる距離となしたことを特徴とす
る共振器。[Claims for Utility Model Registration] An interdigital electrode for exciting surface acoustic waves and an interdigital electrode for receiving surface acoustic waves are provided on a piezoelectric substrate , and strips or grooves are arranged periodically on both sides of the interdigital electrode. In a resonator including a surface acoustic wave reflector, the distance between the interdigital electrodes is approximately 8
The distance is given by the sum of a half wavelength and an integral multiple of a half wavelength, and the distance between the interdigital electrode and the reflector is approximately 0 degrees when the phase of the reflection coefficient of the reflector is 0 degrees. The distance is given by the sum of three-eighths wavelength and an integral multiple of half wavelength, while the above phase is 180
In the case of a wavelength, the resonator is characterized in that the distance is given by the sum of about a quarter wavelength and an integer multiple of a half wavelength.

Claims

[Scope of utility model registration request]

An interdigital electrode that excites surface acoustic waves and an interdigital electrode that receives surface acoustic waves are provided on the left electrical board, and a surface acoustic wave reflector with strips or grooves arranged periodically on both sides is provided. In the resonator, the distance between the interdigital electrodes is approximately 8
The distance is given by the sum of a half wavelength and an integral multiple of a half wavelength, and the distance between the interdigital electrode and the reflector is approximately 0 degrees when the phase of the reflection coefficient of the reflector is 0 degrees. The distance is given by the sum of three-eighths wavelength and an integral multiple of half wavelength, while the above phase is 180
In the case of a wavelength, the resonator is characterized in that the distance is given by the sum of about a quarter wavelength and an integer multiple of a half wavelength.