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KR950035059A - Surface wave resonator - Google Patents

Surface wave resonator Download PDF

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Publication number
KR950035059A
KR950035059A KR1019950013534A KR19950013534A KR950035059A KR 950035059 A KR950035059 A KR 950035059A KR 1019950013534 A KR1019950013534 A KR 1019950013534A KR 19950013534 A KR19950013534 A KR 19950013534A KR 950035059 A KR950035059 A KR 950035059A
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South Korea
Prior art keywords
resonator
unit
surface wave
resonance
cross
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KR1019950013534A
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Korean (ko)
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KR0180292B1 (en
Inventor
미찌오 가도따
가즈히꼬 모로즈미
Original Assignee
무라따 야스따까
가부시끼가이샤 무라따 세이사꾸쇼
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Publication of KR950035059A publication Critical patent/KR950035059A/en
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    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02653—Grooves or arrays buried in the substrate
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
    • H03H9/02—Details
    • H03H9/02535—Details of surface acoustic wave devices
    • H03H9/02637—Details concerning reflective or coupling arrays
    • H03H9/02669—Edge reflection structures, i.e. resonating structures without metallic reflectors, e.g. Bleustein-Gulyaev-Shimizu [BGS], shear horizontal [SH], shear transverse [ST], Love waves devices

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)

Abstract

본 발명에 의하면 단일 소자를 사용하여 다수개의 공진 특성을 갖는 HS형의 표면파 공진자를 이용한 단면반사형 표면파 공진자가 제공된다.According to the present invention, there is provided a sectional reflection type surface wave resonator using an HS type surface wave resonator having a plurality of resonance characteristics using a single element.

본 발명에 의한 표면파 공진자는 압전기판의 마주보는 두 단면 사이에서 표면파가 반사되며 제1공진 유니트 및 제2공진 유니트를 구성하는 IDT들을 가지고 있다. 상기 두 단면간의 거리 L은, λ1이 제1공진 유니트에 의해 여진된 표면파의 파장을 나타낼 때, (λ1/2)×N1±(λ1/20)(N1은 정수)의 범위로 표현된다. 상기 거리 L은 λ2가 제2공진 유니트에 의해 여진된 표면파의 파장을 나타낼 때, (λ2/2)×N2±(λ2/20)의 범위를 벗어나도록 결정된다.The surface wave resonator according to the present invention has surface IDs reflected between two opposing end faces of the piezoelectric plate and has IDTs constituting the first resonance unit and the second resonance unit. When the two distance L between the end face is, λ 1 represent the wavelength of the surface wave excited by the first resonance unit, the range of (λ 1/2) × N 1 ± (λ 1/20) (N 1 is an integer) It is expressed as The distance L is determined such that λ 2 is out of range of the second resonance unit represented by the time the wavelength of the surface wave excitation, (λ 2/2) × N 2 ± (λ 2/20).

Description

표면파 공진자Surface wave resonator

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제6도는 본 발명의 제1구현예에 의한 단면반사형 표면파 공진자를 나타내는 평면도이다, 제7도는 제6도에 나타난 표면파 공진자의 제2공진 유니트의 임피던스-주파수 특성 관계를 나타낸다, 제8도는 제6도에 나타난 단면 반사형 표면파 공진자의 제1공진 유니트의 임피던스-주파수 특성 관계를 나타낸다, 제9도는 본 발명의 제2구현예에 의한 단면 반사현 표면파 공진자의 사시도이다, 제10도는 제9도에 나타난 구현예의 표면파 공진자의 변형예를 보여주는 사시도이다.FIG. 6 is a plan view showing a surface reflection type surface wave resonator according to a first embodiment of the present invention. FIG. 7 shows an impedance-frequency characteristic relationship of the second resonance unit of the surface wave resonator shown in FIG. 6. FIG. Fig. 6 shows the impedance-frequency characteristic relationship of the first resonance unit of the sectional reflective surface wave resonator shown in Fig. 6, Fig. 9 is a perspective view of the sectional reflective wave surface wave resonator according to the second embodiment of the present invention. A perspective view showing a modification of the surface wave resonator of the embodiment shown in FIG.

Claims (7)

압전기판의 두 단면에 의해 HS(horizontal shear)형의 표면파가 반사되어지는 단면반사형 표면파 공진자에 있어서, 상기 단면반사형 표면파 공진자는, 상기 두 단면을 가진 압전기판 및 상기 압전기판 상에 형성된 제1교차시 전극(IDT) 및 제2교차지 전극을 포함하고 있으며; 상기 제1교차지 전극이 형성된 부분에 의해 제1공진 유니트가 형성되고, 상기 제2교차지 전극이 형성된 부분에 의해 상기 제1공진 유니트의 공진 주파수 f1과 다른 공진 주파수를 f2를 갖는 제2의 공진 유니트가 구성되며; 상기 두 단면간의 거리를 L이라 하고 상기 제1공진 유니트에 의해 여진된 표면파의 파장을 λ1, 제2공진 유니트에 의해 여진된 표면파의 파장을 λ2라고 할 때, 거리 L이 (λ1/2)×N1(N1은 정수)과 동일하거나 유사하도록 결정되고 (λ2/2)×N2와 L이 유사하도록 N2(N2는 정수)가 선택되어짐을 특징으로 하는 단면반사형 표면파 공진자.In a cross-sectional reflection type surface wave resonator in which a horizontal shear (HS) type surface wave is reflected by two cross sections of a piezoelectric plate, the cross-sectional reflection type surface wave resonator is formed on the piezoelectric plate having the two cross sections and the piezoelectric plate. A first crossing electrode (IDT) and a second crossing electrode; The first resonance unit is formed by the portion where the first cross-electrode is formed, and the second resonance electrode has a resonance frequency f 2 that is different from the resonance frequency f 1 of the first resonance unit by the portion where the second cross-electrode is formed. A resonant unit is constructed; When the distance between the two cross sections is L and the wavelength of the surface wave excited by the first resonance unit is λ 1 and the wavelength of the surface wave excited by the second resonance unit is λ 2 , the distance L is (λ 1 / 2) × N 1 (N 1 is an integer) and is determined to be the same as or similar (λ 2/2) × N 2 and L N 2 (N 2 is an integer that is similar to) the edge reflection type, characterized by selecting doeeojim Surface wave resonator. 제1항에 있어서, 상기 거리 L이 (λ1/2)×N1±(λ1/20)의 범위에 있음을 특징으로 하는 단면반사형 표면파 공진자.2. The method of claim 1, wherein the distance L (λ 1/2) × N 1 ± (λ 1/20) edge reflection type surface acoustic wave resonator, characterized in that the range of the chair. 제1항 또는 제2항에 있어서, 상기 거리 L이 (λ2/2)×N2±(λ2/20)의 범위를 벗어남을 특징으로 하는 단면반사형 표면파 공진자.According to claim 1 or 2, wherein the distance L (λ 2/2) × N 2 ± character edge reflection type surface acoustic wave resonator, characterized by departing from the scope of the (λ 2/20). 제1항 내지 제3항 중 어느 한 항에 있어서, 상기 제1공진 유니트의 공진 주파수 f1이 제2공진 유니트의 공진 주파수 f2보다 더 높음을 특징으로 하는 단면반사형 표면파 공진자.The surface reflection type resonator of claim 1, wherein the resonant frequency f 1 of the first resonant unit is higher than the resonant frequency f 2 of the second resonant unit. 제1항 내지 제4항 중 어느 한 항에 있어서, 상기 표면과 공진자가 텔레비젼 수상기의 영상 중간 주파단계의 트랩 회로를 구성하는 공진자이며, 상기 제1공진 주파수 f1이 인접 채널의 음성 신호 주파수이고 상기 제2공진 주파수 f2가 인접 채널의 영상신호 주파수임을 특징으로 하는 단면반사형 표면파 공진자.5. The surface and resonator according to any one of claims 1 to 4, wherein the surface and the resonator are resonators constituting a trap circuit of an image intermediate frequency step of a television receiver, wherein the first resonant frequency f 1 is an audio signal frequency of an adjacent channel. And the second resonance frequency f 2 is an image signal frequency of an adjacent channel. 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 제1공진 유니트 및 제2공진 유니트가 압전기판 상에 형성되어 있는 적어도 하나의 홈에 의해 분리되며, 상기 제1공진 유니트 및 제2공진 유니트의 두 단면 중 하나가 상기 홈의 내측벽에 의해 구성됨을 특징으로 하는 단면반사형 표면파 공진자.6. The first resonator unit and the second resonator unit according to any one of claims 1 to 5, wherein the first resonator unit and the second resonator unit are separated by at least one groove formed on the piezoelectric plate. A surface reflection type surface wave resonator, characterized in that one of two sections of the unit is constituted by an inner wall of the groove. HS형 표면파를 이용한 단면반사형 표면파 공진자에서, 상기 공진자는 적어도 한 쪽 표면에 형성된 적어도 하나의 홈을 갖는 압전기판 및 상기 압전기판 상에 형성된 제1교차지 전극 및 제2교차지 전극을 포함하고 있으며; 상기 제1, 제2교차지 전극은 상기 적어도 하나의 홈에 의해 분리되어지고 각각 제1공진 유니트 및 제2공진 유니트를 구성하고; 상기 제1공진 유니트 및 제2공진 유니트의 표면파가 반사되는 두 단면중의 적어도 하나가 상기 홈의 내측벽에 의해 구성됨을 특징으로 하는 단면반사형 표면파 공진자.In a cross-sectional reflection type surface wave resonator using an HS type surface wave, the resonator includes a piezoelectric plate having at least one groove formed on at least one surface thereof, and a first cross electrode and a second cross electrode formed on the piezoelectric plate. ; The first and second crossover electrodes are separated by the at least one groove and constitute a first resonance unit and a second resonance unit, respectively; And at least one of the two end surfaces in which the surface waves of the first and second resonance units are reflected by the inner wall of the groove. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950013534A 1994-05-30 1995-05-27 Surface wave resonator KR0180292B1 (en)

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JP6-116975 1994-05-30
JP11697594A JP3196499B2 (en) 1994-05-30 1994-05-30 Surface wave resonator

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KR0180292B1 KR0180292B1 (en) 1999-04-01

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JP3233087B2 (en) * 1997-01-20 2001-11-26 株式会社村田製作所 Surface acoustic wave filter
JP3298538B2 (en) * 1999-02-16 2002-07-02 株式会社村田製作所 Edge reflection vertical coupling type SAW resonator filter
JP3744479B2 (en) * 2001-09-28 2006-02-08 株式会社村田製作所 Surface wave device and communication device
DE102008016613B4 (en) * 2008-04-01 2010-04-15 Epcos Ag Method for producing an electrical component having at least one dielectric layer and an electrical component having at least one dielectric layer
CN105490662B (en) * 2015-11-27 2018-07-31 北京时代民芯科技有限公司 A kind of SAW filter and its manufacturing method
CN109303370A (en) * 2017-07-26 2019-02-05 株式会社泰已科 Simple protective cap
US11848663B2 (en) 2018-07-27 2023-12-19 Frec'n'sys Resonant cavity surface acoustic wave (SAW) filters

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GB2000409A (en) * 1977-04-07 1979-01-04 Philips Electronic Associated Resonators employing surface skimming bulk waves
JPS61100014A (en) * 1984-10-23 1986-05-19 Fujitsu Ltd elastic wave device

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CN1075908C (en) 2001-12-05
JPH07321598A (en) 1995-12-08
TW263630B (en) 1995-11-21
JP3196499B2 (en) 2001-08-06
CN1115913A (en) 1996-01-31
KR0180292B1 (en) 1999-04-01

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