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US3727718A Expired / Lapsed US ⏱️ 0.0 years remaining

Surface wave ambiguity analyzer

Assignee: United States Department of the Navy
•
Filing: 1971-11-24
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Granted: 1973-04-17
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Expires: 1991-11-24
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Abstract

Abstract A surface-wave ambiguity analyzer comprising a substrate, capable of propagating an acoustic surface wave on its surface, and a transmitting electroacoustic transducer, disposed upon the substrate, having a perimeter substantially in the shape of a trapezoid whose base is parallel to the direction of surface wave propagation. The transmitting transducer comprises a pair of sets of interdigited electrodes, the configuration of the electrodes conforming in shape to the graphs of a set of regular functions which do not cross or otherwise touch each other, a top bus bar, parallel to the base of the trapezoid, to which one of the sets of electrodes is connected, and a bottom bus bar, forming the base of the trapezoid, to which the other set of electrodes of the pair of sets is connected, the top and bottom bus bars being connectable to an electrical signal source. Two absorbers, one on each end of the substrate, are disposed perpendicularly to the base of the trapezoid, for absorbing unwanted acoustic reflections. The ambiguity analyzer may further comprise at least one acousto-electric receiving transducer, disposed at one end of the substrate between the transmitting transducer and one of the absorbers, whose electrodes are disposed perpendicularly to the direction of propagation of the acoustic wave.

Inventors

  • 👤 H Whitehouse

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 18:47
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/70; H03H9/72; G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/64; H03H9/02; H03H9/02535; H03H9/02637; H03H9/02685; H03H9/0274; H03H9/02755; H03H9/125; H03H9/145; H03H9/14544; H03H9/14558; H03H9/14561; H03H9/14564; H03H9/14567; H03H9/46; H03H9/64; H03H9/6406; H03H9/6416; H03H9/14547

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 197 words
A surface-wave ambiguity analyzer comprising: a substrate, capable of propagating an acoustic surface wave on its surface; a transmitting electroacoustic transducer, disposed upon the substrate, having a perimeter substantially in the shape of a trapezoid whose base is parallel to the direction of surface wave propagation, comprising: a pair of sets oF interdigitated electrodes, the configuration of the electrodes conforming in shape to the graphs of a set of regular functions which do not cross or otherwise touch each other; a top bus bar, parallel to the base of the trapezoid, to which one of the sets of electrodes is connected; a bottom bus bar, forming the base of the trapezoid, to which the other set of electrodes of the pair of sets is connected; the top and bottom bus bars being connectable to an electrical signal source; two absorbers, one on each end of the substrate, disposed perpendic-ularly to the base of the trapezoid, for absorbing unwanted acoustic reflections and; at least two acoustic-electric receiving transducers, disposed at one end of the substrate between the transmitting transducer and one of the absorbers, whose electrodes are disposed perpendicularly to the direction of propagation of the acoustic wave.
Claim 2
Dependent Claim 197 words
A surface-wave ambiguity analyzer comprising: a substrate, capable of propagating an acoustic surface wave on its surface; a transmitting electroacoustic transducer, disposed upon the substrate, having a perimeter substantially in the shape of a trapezoid whose base is parallel to the direction of surface wave propagation, comprising: a pair of sets oF interdigitated electrodes, the configuration of the electrodes conforming in shape to the graphs of a set of regular functions which do not cross or otherwise touch each other; a top bus bar, parallel to the base of the trapezoid, to which one of the sets of electrodes is connected; a bottom bus bar, forming the base of the trapezoid, to which the other set of electrodes of the pair of sets is connected; the top and bottom bus bars being connectable to an electrical signal source; two absorbers, one on each end of the substrate, disposed perpendic-ularly to the base of the trapezoid, for absorbing unwanted acoustic reflections and; at least two acoustic-electric receiving transducers, disposed at one end of the substrate between the transmitting transducer and one of the absorbers, whose electrodes are disposed perpendicularly to the direction of propagation of the acoustic wave.
Claim 3
Dependent Claim 16 words
The ambiguity analyzer according to claim 1, wherein the pair of sets of electrodes are uncoded.
Claim 4
Dependent Claim 16 words
The ambiguity analyzer according to claim 2, wherein the pair of sets of electrodes are coded.
Claim 5
Dependent Claim 48 words
The ambiguity analyzer according to claim 3, wherein the transmitting transducer further comprises a third set of electrodes, a field-delineating, interconnected, set disposed between the pair of sets of electrodes, and conforming in shape to the same set of regular functions as the pair of sets of electrodes.
Claim 6
Dependent Claim 19 words
The ambiguity analyzer according to claim 4, wherein the set of regular functions are a set of linear functions.
Claim 7
Dependent Claim 19 words
The ambiguity analyzer according to claim 4, wherein the set of regular functions are a set of quadratic functions.
Claim 8
Dependent Claim 30 words
The ambiguity analyzer according to claim 4, wherein the individual electrodes of each of the three sets of electrodes of the transmitting transducer have the shape of a staircase function.
Claim 9
Dependent Claim 17 words
The ambiguity analyzer according to claim 4, wherein the two lateral sides of the trapezoid are equal.
Claim 10
Dependent Claim 17 words
The ambiguity analyzer according to claim 5, wherein the two lateral sides of the trapezoid are equal.

References Cited (Backward Citations)

US3582838A Cited
US3573673A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-16 1976-10-16 1977-04-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-16 1980-10-16 1981-04-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-16 1984-10-16 1985-04-17 $7700.00 Window Closed / Lapsed

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