FR2491697A1 - Filtres d'ondes acoustiques de surface - Google Patents
Filtres d'ondes acoustiques de surface Download PDFInfo
- Publication number
- FR2491697A1 FR2491697A1 FR8118875A FR8118875A FR2491697A1 FR 2491697 A1 FR2491697 A1 FR 2491697A1 FR 8118875 A FR8118875 A FR 8118875A FR 8118875 A FR8118875 A FR 8118875A FR 2491697 A1 FR2491697 A1 FR 2491697A1
- Authority
- FR
- France
- Prior art keywords
- frequency
- range
- mhz
- filter
- filters
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010897 surface acoustic wave method Methods 0.000 title claims abstract description 60
- 239000000758 substrate Substances 0.000 claims abstract description 66
- 230000000903 blocking effect Effects 0.000 claims abstract description 39
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000004044 response Effects 0.000 claims description 69
- 230000001902 propagating effect Effects 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 abstract description 6
- 238000006731 degradation reaction Methods 0.000 abstract description 6
- 230000007423 decrease Effects 0.000 description 11
- 241000238876 Acari Species 0.000 description 8
- 238000004364 calculation method Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 230000003071 parasitic effect Effects 0.000 description 6
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 229910052744 lithium Inorganic materials 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000013078 crystal Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 101100346656 Drosophila melanogaster strat gene Proteins 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000005516 deep trap Effects 0.000 description 2
- 238000013213 extrapolation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 244000045947 parasite Species 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012935 Averaging Methods 0.000 description 1
- 241001125929 Trisopterus luscus Species 0.000 description 1
- 244000309466 calf Species 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators
- H03H9/46—Filters
- H03H9/64—Filters using surface acoustic waves
- H03H9/6489—Compensation of undesirable effects
-
- 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
- H03H9/02543—Characteristics of substrate, e.g. cutting angles
- H03H9/02559—Characteristics of substrate, e.g. cutting angles of lithium niobate or lithium-tantalate substrates
-
- 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
- H03H9/02818—Means for compensation or elimination of undesirable effects
- H03H9/02866—Means for compensation or elimination of undesirable effects of bulk wave excitation and reflections
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8032360A GB2086684B (en) | 1980-10-08 | 1980-10-08 | Surface acoustic wave filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2491697A1 true FR2491697A1 (fr) | 1982-04-09 |
| FR2491697B1 FR2491697B1 (enExample) | 1985-03-29 |
Family
ID=10516541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8118875A Granted FR2491697A1 (fr) | 1980-10-08 | 1981-10-07 | Filtres d'ondes acoustiques de surface |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US4409571A (enExample) |
| JP (1) | JPS5792916A (enExample) |
| AU (1) | AU546432B2 (enExample) |
| CA (1) | CA1169505A (enExample) |
| DE (1) | DE3139611A1 (enExample) |
| ES (1) | ES506047A0 (enExample) |
| FR (1) | FR2491697A1 (enExample) |
| GB (1) | GB2086684B (enExample) |
| IT (1) | IT1139201B (enExample) |
| SE (1) | SE453625B (enExample) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2132048A (en) * | 1982-09-15 | 1984-06-27 | Philips Electronic Associated | Acoustic surface wave device |
| DE3579832D1 (de) * | 1984-02-15 | 1990-10-31 | Trw Inc | Isotropisches substrat fuer akustische wellen. |
| US4707631A (en) * | 1984-02-15 | 1987-11-17 | Trw Inc. | Isotropic acoustic wave substrate |
| US4825467A (en) * | 1986-11-25 | 1989-04-25 | International Telesystems, Inc. | Restricted access television transmission system |
| DE3818537A1 (de) * | 1988-05-31 | 1989-12-07 | Siemens Ag | Lithiumniobat-einkristalle mit kongruenter zusammensetzung, insbesondere fuer oberflaechenwellenanordnungen, und verfahren zu deren herstellung |
| CN1150675C (zh) * | 1996-03-08 | 2004-05-19 | 三洋电机株式会社 | 声表面波元件和采用它的电话手机 |
| US10648868B2 (en) * | 2014-12-24 | 2020-05-12 | Citizen Watch Co., Ltd. | Surface acoustic wave device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1491250A (en) * | 1973-12-28 | 1977-11-09 | Nihon Dempa Kogyo Co | Elastic surface wave device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3956646A (en) * | 1973-12-28 | 1976-05-11 | Nihon Dempa Kogyo Co., Ltd. | Lithium niobate piezoelectric substrate for use in an elastic surface wave device |
| US4016440A (en) * | 1974-05-28 | 1977-04-05 | Texas Instruments Incorporated | Particularly oriented plate-like monocrystalline piezoelectric body and acoustic surface wave filter device employing same |
-
1980
- 1980-10-08 GB GB8032360A patent/GB2086684B/en not_active Expired
-
1981
- 1981-09-21 US US06/303,806 patent/US4409571A/en not_active Expired - Fee Related
- 1981-10-01 CA CA000387120A patent/CA1169505A/en not_active Expired
- 1981-10-05 SE SE8105854A patent/SE453625B/sv not_active IP Right Cessation
- 1981-10-05 IT IT24333/81A patent/IT1139201B/it active
- 1981-10-06 ES ES506047A patent/ES506047A0/es active Granted
- 1981-10-06 DE DE19813139611 patent/DE3139611A1/de not_active Ceased
- 1981-10-07 AU AU76096/81A patent/AU546432B2/en not_active Ceased
- 1981-10-07 FR FR8118875A patent/FR2491697A1/fr active Granted
- 1981-10-08 JP JP56159575A patent/JPS5792916A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1491250A (en) * | 1973-12-28 | 1977-11-09 | Nihon Dempa Kogyo Co | Elastic surface wave device |
Non-Patent Citations (2)
| Title |
|---|
| 1978 ULTRASONICS SYMPOSIUM PROCEEDINGS, 25-27 septembre 1978, IEEE, NEW YORK (US) * |
| APPLIED PHYSICS LETTERS; vol. 17, no. 5, 1er septembre 1970, NEW YORK (US) * |
Also Published As
| Publication number | Publication date |
|---|---|
| US4409571A (en) | 1983-10-11 |
| CA1169505A (en) | 1984-06-19 |
| IT8124333A0 (it) | 1981-10-05 |
| GB2086684B (en) | 1984-05-10 |
| JPS5792916A (en) | 1982-06-09 |
| ES8207392A1 (es) | 1982-09-01 |
| SE8105854L (sv) | 1982-04-09 |
| AU546432B2 (en) | 1985-08-29 |
| FR2491697B1 (enExample) | 1985-03-29 |
| AU7609681A (en) | 1982-04-22 |
| ES506047A0 (es) | 1982-09-01 |
| IT1139201B (it) | 1986-09-24 |
| GB2086684A (en) | 1982-05-12 |
| DE3139611A1 (de) | 1982-06-24 |
| SE453625B (sv) | 1988-02-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |