CA1137183A - Acoustic wave filter - Google Patents
Acoustic wave filterInfo
- Publication number
- CA1137183A CA1137183A CA000347384A CA347384A CA1137183A CA 1137183 A CA1137183 A CA 1137183A CA 000347384 A CA000347384 A CA 000347384A CA 347384 A CA347384 A CA 347384A CA 1137183 A CA1137183 A CA 1137183A
- Authority
- CA
- Canada
- Prior art keywords
- digital
- frequency
- band
- characteristic
- interdigital
- 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.)
- Expired
Links
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 230000002452 interceptive effect Effects 0.000 claims abstract description 13
- 230000001419 dependent effect Effects 0.000 claims description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000727554 Ampelopsis cordata Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 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
- H03H9/02—Details
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
- H03H9/14514—Broad band transducers
-
- 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
- H03H9/125—Driving means, e.g. electrodes, coils
- H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
- H03H9/14502—Surface acoustic wave [SAW] transducers for a particular purpose
- H03H9/14505—Unidirectional SAW transducers
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Thermistors And Varistors (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP2909705.0-35 | 1979-03-12 | ||
| DE2909705A DE2909705C2 (de) | 1979-03-12 | 1979-03-12 | Akustische Oberflächenwellenanordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137183A true CA1137183A (en) | 1982-12-07 |
Family
ID=6065190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000347384A Expired CA1137183A (en) | 1979-03-12 | 1980-03-11 | Acoustic wave filter |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4325037A (en]) |
| EP (1) | EP0016979B1 (en]) |
| JP (2) | JPS55130219A (en]) |
| AT (1) | ATE4077T1 (en]) |
| BR (1) | BR8001429A (en]) |
| CA (1) | CA1137183A (en]) |
| DE (1) | DE2909705C2 (en]) |
| ES (1) | ES489418A1 (en]) |
| HU (1) | HU181685B (en]) |
| SU (1) | SU1346060A3 (en]) |
| YU (1) | YU67080A (en]) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3438246A1 (de) * | 1984-10-18 | 1986-04-24 | Siemens AG, 1000 Berlin und 8000 München | Akustisches wellenfilter |
| NO855284L (no) * | 1985-01-18 | 1986-07-21 | Siemens Ag | Filter som arbeider med akustiske boelger. |
| NO855285L (no) * | 1985-01-22 | 1986-07-23 | Siemens Ag | Filter som arbeider med akustiske boelger. |
| JPH0646692B2 (ja) * | 1986-01-10 | 1994-06-15 | 株式会社日立製作所 | 弾性表面波共振子 |
| US4731595A (en) * | 1986-01-24 | 1988-03-15 | Rf Monolithics, Inc. | Resonator structure |
| DE19638627B4 (de) * | 1996-09-20 | 2007-09-27 | Epcos Ag | Oberflächenwellen(OFW)-Filter |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3582838A (en) * | 1966-09-27 | 1971-06-01 | Zenith Radio Corp | Surface wave devices |
| US3550045A (en) * | 1969-06-25 | 1970-12-22 | Zenith Radio Corp | Acoustic surface wave filter devices |
| GB1328343A (en) * | 1969-09-17 | 1973-08-30 | Mullard Ltd | Electro mechanical filters |
| DE2132985C3 (de) * | 1971-07-02 | 1981-06-04 | Siemens AG, 1000 Berlin und 8000 München | Piezoelektrisches Filter nach dem Oberflächenwellenprinzip |
| US3987376A (en) * | 1974-03-22 | 1976-10-19 | Hazeltine Corporation | Acoustic surface wave device with harmonic coupled transducers |
| GB1529941A (en) * | 1975-01-15 | 1978-10-25 | Mullard Ltd | Electrical filters including coupled resonators |
| DE2610183A1 (de) * | 1975-03-12 | 1976-09-23 | Murata Manufacturing Co | Wellenfilter mit akustischer oberflaechenleitung |
| DE2615719A1 (de) * | 1976-04-09 | 1977-10-27 | Siemens Ag | Filter nach dem oberflaechenwellenprinzip |
-
1979
- 1979-03-12 DE DE2909705A patent/DE2909705C2/de not_active Expired
-
1980
- 1980-03-03 EP EP80101065A patent/EP0016979B1/de not_active Expired
- 1980-03-03 AT AT80101065T patent/ATE4077T1/de active
- 1980-03-06 US US06/127,814 patent/US4325037A/en not_active Expired - Lifetime
- 1980-03-10 JP JP3021480A patent/JPS55130219A/ja active Pending
- 1980-03-11 YU YU00670/80A patent/YU67080A/xx unknown
- 1980-03-11 SU SU802891852A patent/SU1346060A3/ru active
- 1980-03-11 CA CA000347384A patent/CA1137183A/en not_active Expired
- 1980-03-11 BR BR8001429A patent/BR8001429A/pt unknown
- 1980-03-11 HU HU80574A patent/HU181685B/hu unknown
- 1980-03-11 ES ES489418A patent/ES489418A1/es not_active Expired
-
1987
- 1987-06-19 JP JP1987094554U patent/JPH026670Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55130219A (en) | 1980-10-08 |
| US4325037A (en) | 1982-04-13 |
| EP0016979A1 (de) | 1980-10-15 |
| SU1346060A3 (ru) | 1987-10-15 |
| JPS6312931U (en]) | 1988-01-28 |
| YU67080A (en) | 1983-06-30 |
| HU181685B (en) | 1983-11-28 |
| DE2909705C2 (de) | 1984-09-06 |
| BR8001429A (pt) | 1980-11-11 |
| ATE4077T1 (de) | 1983-07-15 |
| EP0016979B1 (de) | 1983-07-06 |
| ES489418A1 (es) | 1980-09-16 |
| JPH026670Y2 (en]) | 1990-02-19 |
| DE2909705A1 (de) | 1980-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |