FR2396456A1 - Perfectionnements aux filtres electromecaniques - Google Patents
Perfectionnements aux filtres electromecaniquesInfo
- Publication number
- FR2396456A1 FR2396456A1 FR7720396A FR7720396A FR2396456A1 FR 2396456 A1 FR2396456 A1 FR 2396456A1 FR 7720396 A FR7720396 A FR 7720396A FR 7720396 A FR7720396 A FR 7720396A FR 2396456 A1 FR2396456 A1 FR 2396456A1
- Authority
- FR
- France
- Prior art keywords
- resonators
- rank
- resonator
- wave
- hand
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H3/00—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators
- H03H3/007—Apparatus or processes specially adapted for the manufacture of impedance networks, resonating circuits, resonators for the manufacture of electromechanical resonators or networks
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/46—Filters
- H03H9/48—Coupling means therefor
- H03H9/50—Mechanical coupling means
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
Abstract
Filtre électromécanique passe-bande, comprenant un ensemble mécanique vibrant en mode longitudinal monté entre deux transducteurs électromécaniques, ledit ensemble comprenant une pluralité de résonateurs demi-onde montés en cascade et des coupleurs reliant les résonateurs consécutifs, les résonateurs étant répartis en deux groupes dont l'un comprend les résonateurs de rang impair et l'autre les résonateurs de rang pair, le filtre comprenant en outre au moins un coupleur de pontage reliant un résonateur de rang k à un résonateur de rang k + (2p + 1) (p entier positif non nul). Ledit coupleur de pontage a ses extrémités fixées à une certaine distance des faces terminales des résonateurs, au moins le coupleur de pontage, d'une part, ou les coupleurs situés entre le résonateur de rang k et celui de rang k + (2p + 1) d'autre part, ayant une longueur respectivement différente de trois-quarts d'onde ou différente d'un quart-d'onde.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7720396A FR2396456A1 (fr) | 1977-07-01 | 1977-07-01 | Perfectionnements aux filtres electromecaniques |
US05/918,797 US4184132A (en) | 1977-07-01 | 1978-06-26 | Electromechanical filters |
DE2828465A DE2828465C2 (de) | 1977-07-01 | 1978-06-29 | Elektromechanisches Bandpaßfilter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7720396A FR2396456A1 (fr) | 1977-07-01 | 1977-07-01 | Perfectionnements aux filtres electromecaniques |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2396456A1 true FR2396456A1 (fr) | 1979-01-26 |
FR2396456B1 FR2396456B1 (fr) | 1982-01-08 |
Family
ID=9192898
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7720396A Granted FR2396456A1 (fr) | 1977-07-01 | 1977-07-01 | Perfectionnements aux filtres electromecaniques |
Country Status (3)
Country | Link |
---|---|
US (1) | US4184132A (fr) |
DE (1) | DE2828465C2 (fr) |
FR (1) | FR2396456A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1257993B (de) * | 1961-02-28 | 1968-01-04 | Telefunken Patent | Mechanisches Frequenzfilter |
DE2142332C2 (de) * | 1971-08-24 | 1983-07-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Mechanisches Filter und Verfahren zur Herstellung des Filters |
DE2453122A1 (de) * | 1974-11-08 | 1976-05-20 | Siemens Ag | Filter fuer elektrische schwingungen |
FR2304217A1 (fr) * | 1975-03-13 | 1976-10-08 | Cit Alcatel | Filtre mecanique |
FR2350732A1 (fr) * | 1976-05-05 | 1977-12-02 | Telecommunications Sa | Perfectionnements aux filtres electromecaniques passe-bande |
-
1977
- 1977-07-01 FR FR7720396A patent/FR2396456A1/fr active Granted
-
1978
- 1978-06-26 US US05/918,797 patent/US4184132A/en not_active Expired - Lifetime
- 1978-06-29 DE DE2828465A patent/DE2828465C2/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2396456B1 (fr) | 1982-01-08 |
DE2828465A1 (de) | 1979-01-11 |
US4184132A (en) | 1980-01-15 |
DE2828465C2 (de) | 1984-07-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |