GB1389023A – Acoustic wave coupler devices
– Google Patents
GB1389023A – Acoustic wave coupler devices
– Google Patents
Acoustic wave coupler devices
Info
Publication number
GB1389023A
GB1389023A
GB3679271A
GB3679271A
GB1389023A
GB 1389023 A
GB1389023 A
GB 1389023A
GB 3679271 A
GB3679271 A
GB 3679271A
GB 3679271 A
GB3679271 A
GB 3679271A
GB 1389023 A
GB1389023 A
GB 1389023A
Authority
GB
United Kingdom
Prior art keywords
piezo
transducer
path
triplets
duplicated
Prior art date
1971-08-05
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
Application number
GB3679271A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
Priority date (The priority date 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 date listed.)
1971-08-05
Filing date
1971-08-05
Publication date
1975-04-03
1971-08-05
Application filed by Standard Telephone and Cables PLC
filed
Critical
Standard Telephone and Cables PLC
1971-08-05
Priority to GB3679271A
priority
Critical
patent/GB1389023A/en
1975-04-03
Publication of GB1389023A
publication
Critical
patent/GB1389023A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/02—Details
H03H9/05—Holders; Supports
H03H9/0538—Constructional combinations of supports or holders with electromechanical or other electronic elements
H03H9/0542—Constructional combinations of supports or holders with electromechanical or other electronic elements consisting of a lateral arrangement
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/02—Details
H03H9/02535—Details of surface acoustic wave devices
H03H9/02637—Details concerning reflective or coupling arrays
H03H9/02685—Grating lines having particular arrangements
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/74—Multiple-port networks for connecting several sources or loads, working on the same frequency or frequency band, to a common load or source
H03H9/76—Networks using surface acoustic waves
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/02—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
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/02—Details
H03H9/125—Driving means, e.g. electrodes, coils
H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
H03H9/14544—Transducers of particular shape or position
H03H9/1455—Transducers of particular shape or position constituted of N parallel or series transducers
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/02—Details
H03H9/125—Driving means, e.g. electrodes, coils
H03H9/145—Driving means, e.g. electrodes, coils for networks using surface acoustic waves
H03H9/14597—Matching SAW transducers to external electrical circuits
Abstract
1389023 Surface wave devices STANDARD TELEPHONES & CABLES Ltd 3 Aug 1972 [5 Aug 1971] 36792/71 Heading H3U Acoustic surface, or interface, wave couplers comprise a pair of groups of transverse conductors 1 on a substrate which is piezoelectric, a piezo-layer on a non-piezo substrate, or has piezo-layers adjacent the couplers, and transducer 3, Fig. 10. The proportion of wave energy coupled from path A to adjacent path 13 increases with the coupler length. The cells of Fig. 1, may be longitudinally joined, and the whole construction longitudinally duplicated, Fig. 5 (not shown). The constructions of Figs. 2a, 2b may be modified to have triplets of interconnected conductors, Figs. 3a, 3b (not shown), or all the triplets connected together on one side and the whole construction duplicated longiudinally, Fig. 4 (not shown). To avoid unwanted reflections the conductor spacings in Figs. 2a, 2b may be increased progressively, Figs. 9a, 9b (not shown), or each group may have larger conductor spacing than the previous one Figs. 8a, 8b (not shown). Inductors 2, Fig. 6a, may be interposed in the interconnections across the paths, either a pair in series, Fig. 6b, or only one, Fig. 6a (not shown), to compensate interfinger capacitance, which may alternatively be compensated by a meander line (1A), Fig. 7 (not shown). Unidirectional transducer, Fig. 10.-The two parts of any of the above forms of coupler are folded back with respect to each other to form the array 6A, 6B, encompassing transducer 3, one eighth of an acoustic wavelength nearer part 6A than 6B, resulting in propagation unidirectionally along path A. Exemplary dimensions for 100 MHz are given.
GB3679271A
1971-08-05
1971-08-05
Acoustic wave coupler devices
Expired
GB1389023A
(en)
Priority Applications (1)
Application Number
Priority Date
Filing Date
Title
GB3679271A
GB1389023A
(en)
1971-08-05
1971-08-05
Acoustic wave coupler devices
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB3679271A
GB1389023A
(en)
1971-08-05
1971-08-05
Acoustic wave coupler devices
Publications (1)
Publication Number
Publication Date
GB1389023A
true
GB1389023A
(en)
1975-04-03
Family
ID=10391226
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3679271A
Expired
GB1389023A
(en)
1971-08-05
1971-08-05
Acoustic wave coupler devices
Country Status (1)
Country
Link
GB
(1)
GB1389023A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0098116A2
(en)
*
1982-06-29
1984-01-11
Fujitsu Limited
Surface acoustic device
1971
1971-08-05
GB
GB3679271A
patent/GB1389023A/en
not_active
Expired
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
EP0098116A2
(en)
*
1982-06-29
1984-01-11
Fujitsu Limited
Surface acoustic device
EP0098116A3
(en)
*
1982-06-29
1985-10-09
Fujitsu Limited
Surface acoustic device
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Legal Events
Date
Code
Title
Description
1975-08-13
PS
Patent sealed
1980-03-19
PCNP
Patent ceased through non-payment of renewal fee
