GB1070170A – Improvements in or relating to ultrasonic devices
– Google Patents
GB1070170A – Improvements in or relating to ultrasonic devices
– Google Patents
Improvements in or relating to ultrasonic devices
Info
Publication number
GB1070170A
GB1070170A
GB51515/64A
GB5151564A
GB1070170A
GB 1070170 A
GB1070170 A
GB 1070170A
GB 51515/64 A
GB51515/64 A
GB 51515/64A
GB 5151564 A
GB5151564 A
GB 5151564A
GB 1070170 A
GB1070170 A
GB 1070170A
Authority
GB
United Kingdom
Prior art keywords
electrodes
frequency
line
wave
wedge
Prior art date
1963-12-24
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
GB51515/64A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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.)
1963-12-24
Filing date
1964-12-18
Publication date
1967-06-01
1964-12-18
Application filed by Western Electric Co Inc
filed
Critical
Western Electric Co Inc
1967-06-01
Publication of GB1070170A
publication
Critical
patent/GB1070170A/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
H03H9/46—Filters
H03H9/64—Filters using surface acoustic waves
G—PHYSICS
G10—MUSICAL INSTRUMENTS; ACOUSTICS
G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
G10K11/36—Devices for manipulating acoustic surface 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
H03H9/14517—Means for weighting
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
H03H9/14538—Formation
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/25—Constructional features of resonators 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
H03H9/30—Time-delay networks
H03H9/42—Time-delay networks using surface acoustic waves
H03H9/423—Time-delay networks using surface acoustic waves with adjustable delay time
H—ELECTRICITY
H03—ELECTRONIC CIRCUITRY
H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
H03H9/30—Time-delay networks
H03H9/42—Time-delay networks using surface acoustic waves
H03H9/44—Frequency dependent delay lines, e.g. dispersive delay lines
Abstract
1070,170. Ultrasonic devices. WESTERN ELECTRIC CO. Inc. Dec. 18, 1964 [Dec. 24, 1963], No. 51515/64. Heading H3U. An ultrasonic device comprises a body of piezoelectric material arranged to couple between electrical signals and an ultrasonic Rayleigh surface wave having a component of particle displacement normal to one surface of the body, first electrode means including a plurality of conductive members adjacent said one surface of the body, and second electrode means spaced from the first electrode means and disposed in coupling relation to the body and to the first electrode means. The plurality of conductive members may be acoustically separated from each other according to various functions and electrically connected to each other to produce bandpass filter characteristics, delay versus frequency characteristics that may be uniform with frequency or may vary with frequency according to any desired function, and amplitude transfer characteristics that vary with frequency according to any desired function. In one embodiment (Fig. 1), a delay line 10 of any suitable ultrasonic propagation material having piezoelectric properties, e.g. a suitably cut quartz crystal, ADP (ammonium dihydrogen phosphate), cadmium sulphide, sodium potassium niobate or barium titanate, is provided at one end with a wedge 14 to the end face 13 of which a conventional piezoelectric crystal or ceramic transducer 16 is bonded, an electrical signal source 17 being coupled to the transducer 16. The wedge 14 is preferably formed from a medium having an elastic wave acoustical impedance which is significantly lower than that of the delay line 10, suitable media for this purpose being plastics and containers filled with liquids, but materials of elastic wave impedance more nearly that of the line 10 may also be used if an effective impedance discontinuity. is produced by interposing a viscous or liquid layer between the wedge 14 and the line 10. The angle # between the axis 19, perpendicular to face 13, and the opposite face 15 of the wedge 14 is selected so that the mode of ultrasonic propagation generated by the transducer 16 in the wedge 14 has a velocity component parallel to the upper surface 11 of the line 10 that is equal to the longitudinal velocity of the Rayleigh surface wave along line 10. The Rayleigh surface wave travels along surface 11 and is characterized by particle displacements in at least two perpendicular directions, i.e. normal to surface 11 and along the direction of wave propagation. A plurality of output electrodes 21 to 22, numbering from several hundred to several thousand, are located along surface 11 and comprise thin narrow conductive strips each extending transversely across surface 11 and having a width no greater than one-half wavelength. As the surface wave passes the electrodes 21 to 22, the strains which it sets up in the piezoelectric material of line 10 adjacent the electrodes cause electric fields to form between these electrodes and a ground electrode 24 on the lower surface 12 of the line 10. The remaining energy is dissipated in an acoustical wave absorber 18 located on the end of line 10 remote from the wedge 14. If all electrodes 21 to 22 are electrically connected by a low impedance connection, as by closing switches 23, the structure becomes a bandpass filter. The centre frequency of the band is that frequency for which the electrode spacing is one wavelength of the surface wave. Only for this frequency are the voltages from the electrodes in phase. In order to modify the delay time versus frequency arrangement of the components in a broadband signal, the electrodes are spaced from each other by amounts that vary with distance along the line according to the desired frequency versus delay characteristic and electrically connected together (Fig. 2, not shown). An amplitude transfer characteristic may be introduced merely by controlling the number and/or size of adjacent electrodes having a spacing of one wavelength of the surface wave at each frequency. The devices described are fully reciprocal and may be used in pairs, one member of the pair being used to provide a Rayleigh surface wave as shown in Fig. 3. A delay line 30 of piezoelectric material has two arrays of electrodes 31 to 32 and 34 to 35 arranged on one surface with a spacing between electrodes that varies according to the desired dispersion characteristic, each array being opposed by a ground electrode 33, 36 respectively. If a multifrequency electrical signal is applied between the input terminals 38, the low frequency components will be launched as an ultrasonic wave in the Rayleigh surface mode by electrodes 31 while successively higher frequencies will be launched by electrodes 32. In converse order, the high frequency components are detected by the electrodes 34 and lower frequency components are successively detected as electrodes 35 are approached.
GB51515/64A
1963-12-24
1964-12-18
Improvements in or relating to ultrasonic devices
Expired
GB1070170A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US333022A
US3289114A
(en)
1963-12-24
1963-12-24
Tapped ultrasonic delay line and uses therefor
Publications (1)
Publication Number
Publication Date
GB1070170A
true
GB1070170A
(en)
1967-06-01
Family
ID=23300923
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB51515/64A
Expired
GB1070170A
(en)
1963-12-24
1964-12-18
Improvements in or relating to ultrasonic devices
Country Status (6)
Country
Link
US
(1)
US3289114A
(en)
BE
(1)
BE657431A
(en)
DE
(1)
DE1267354B
(en)
GB
(1)
GB1070170A
(en)
NL
(1)
NL154632B
(en)
SE
(1)
SE313592B
(en)
Families Citing this family (27)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3387233A
(en)
*
1964-06-11
1968-06-04
Bell Telephone Labor Inc
Signal dispersion system
US3360749A
(en)
*
1964-12-09
1967-12-26
Bell Telephone Labor Inc
Elastic wave delay device
FR1447365A
(en)
*
1965-06-16
1966-07-29
Csf
Excitation device for surface waves
US3406358A
(en)
*
1967-10-30
1968-10-15
Bell Telephone Labor Inc
Ultrasonic surface waveguides
US3678364A
(en)
*
1966-09-27
1972-07-18
Zenith Radio Corp
Surface wave devices
US3582840A
(en)
*
1966-09-27
1971-06-01
Zenith Radio Corp
Acoustic wave filter
US3582838A
(en)
*
1966-09-27
1971-06-01
Zenith Radio Corp
Surface wave devices
US3444482A
(en)
*
1967-05-01
1969-05-13
Bell Telephone Labor Inc
Adjustable delay line filter having plurality of binarily weighted segments affixed to a body of piezoelectric material
US3568102A
(en)
*
1967-07-06
1971-03-02
Litton Precision Prod Inc
Split surface wave acoustic delay line
US3582837A
(en)
*
1967-11-08
1971-06-01
Zenith Radio Corp
Signal filter utilizing frequency-dependent variation of input impedance of one-port transducer
US3600710A
(en)
*
1968-08-12
1971-08-17
Zenith Radio Corp
Acoustic surface wave filter
US3611203A
(en)
*
1969-04-16
1971-10-05
Westinghouse Electric Corp
Integrated digital transducer for variable microwave delay line
US3593214A
(en)
*
1969-04-29
1971-07-13
Westinghouse Electric Corp
High impedance transducer
US3737811A
(en)
*
1970-02-13
1973-06-05
Mini Of Aviat Supply In Her Br
Acoustic surface wave device wherein acoustic surface waves may be propagated with an electric field dependent velocity
US3696313A
(en)
*
1970-07-29
1972-10-03
Zenith Radio Corp
Arrangement for converting between acoustic compressional waves and surface waves
GB1355418A
(en)
*
1971-05-24
1974-06-05
Mullard Ltd
Acoustic surface wave devices
US3753157A
(en)
*
1971-06-30
1973-08-14
Ibm
Leaky wave couplers for guided elastic wave and guided optical wave devices
US3699482A
(en)
*
1971-06-30
1972-10-17
Ibm
Surface waveguiding in ceramics by selective poling
JPS56136017A
(en)
*
1980-03-28
1981-10-23
Clarion Co Ltd
Elastic surface wave device and its manufacture
US4746830A
(en)
*
1986-03-14
1988-05-24
Holland William R
Electronic surveillance and identification
US5187403A
(en)
*
1990-05-08
1993-02-16
Hewlett-Packard Company
Acoustic image signal receiver providing for selectively activatable amounts of electrical signal delay
KR20000049066A
(en)
1996-10-17
2000-07-25
핀포인트 코포레이션
Article tracking system
US6812824B1
(en)
1996-10-17
2004-11-02
Rf Technologies, Inc.
Method and apparatus combining a tracking system and a wireless communication system
US6144288A
(en)
*
1997-03-28
2000-11-07
Eaton Corporation
Remote wireless switch sensing circuit using RF transceiver in combination with a SAW chirp processor
DE19911369C2
(en)
*
1999-03-15
2003-04-03
Nanotron Ges Fuer Mikrotechnik
Surface-wave converter device and identification system herewith
US9764355B2
(en)
*
2015-05-11
2017-09-19
Ultra Electronics Maritime Systems Inc.
Acoustic projector system with non-uniform spacing
CN111570208B
(en)
*
2020-05-11
2021-08-06
浙江大学
Device and method for preparing localized heterogeneous composite material regulated and controlled by surface wave time frequency
Family Cites Families (10)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2124599A
(en)
*
1936-07-18
1938-07-26
American Telephone & Telegraph
Electrical network system
US2263376A
(en)
*
1938-06-28
1941-11-18
Emi Ltd
Electric wave filter or the like
US2636937A
(en)
*
1949-04-01
1953-04-28
Rca Corp
Signal separating circuit for color television
US3070761A
(en)
*
1953-05-07
1962-12-25
Smith & Sons Ltd S
Ultrasonic delay lines
GB758647A
(en)
*
1953-05-14
1956-10-10
Nat Res Dev
Electro-mechanical transducers and systems incorporating the same
US2965851A
(en)
*
1957-12-26
1960-12-20
Bell Telephone Labor Inc
Tapped ultrasonic delay line
US2941110A
(en)
*
1958-08-15
1960-06-14
Sylvania Electric Prod
Delay line
US3070048A
(en)
*
1960-03-16
1962-12-25
Coats & Clark
Method of synchronizing sewing machine operation with operation of casting machine
US3103640A
(en)
*
1961-06-19
1963-09-10
Lab For Electronics Inc
Variable ultrasonic delay line
GB988102A
(en)
*
1962-08-03
1965-04-07
Marconi Co Ltd
Improvements in or relating to wave-energy delay cells
1963
1963-12-24
US
US333022A
patent/US3289114A/en
not_active
Expired – Lifetime
1964
1964-11-27
NL
NL646413798A
patent/NL154632B/en
not_active
IP Right Cessation
1964-12-18
GB
GB51515/64A
patent/GB1070170A/en
not_active
Expired
1964-12-19
DE
DEP1267A
patent/DE1267354B/en
active
Pending
1964-12-21
BE
BE657431D
patent/BE657431A/xx
unknown
1964-12-22
SE
SE15554/64A
patent/SE313592B/xx
unknown
Also Published As
Publication number
Publication date
NL154632B
(en)
1977-09-15
NL6413798A
(en)
1965-06-25
DE1267354B
(en)
1968-05-02
BE657431A
(en)
1965-04-16
SE313592B
(en)
1969-08-18
US3289114A
(en)
1966-11-29
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None