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US3568080A
Expired / Lapsed
US
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Self-transducing ultrasonic amplifier
Assignee: Individual
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Filing: 1969-07-23
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Granted: 1971-03-02
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Expires: 1989-07-23
Abstract
Abstract There is disclosed an ultrasonic amplifier for use with microwave signals which does not require transducer elements. A piezoelectric semiconductor element containing current carriers cooperates with a pair of waveguide sections. The microwave signal at the end of one of these sections generates an acoustic signal in the piezoelectric semiconductor element which is amplified by drifting current carriers as it travels down the element. The acoustic signal thereafter excites an electromagnetic signal at the start of the other waveguide section.
Inventors
- 👤 Ronald R Troutman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:50
CPC Classifications
H; H03; H03F; H03F13/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
Apparatus for amplifying and delaying microwave signals comprising, in combination: a piezoelectric semiconductor element containing current carriers, said element having a pair of opposite end faces which are at an acute angle with respect to the longitudinal axis of symmetry of said element; a pair of microwave energy transmission sections, one end of each section being terminated by a surface portion of said element at a location adjacent a different end face such that the electrical field component of a microwave signal present at the end of one of said sections excites an acoustic signal in said element that is reflected from the adjacent end face, travels down said element, is reflected from the other end face and excites a microwave signal at the end of the other transmission section; and means for applying a DC potential across said end faces to cause said current carriers to drift down said element at a velocity sufficient to cause amplification of any acoustic signal also traveling down said element.
Claim 2
Dependent Claim
167 words
Apparatus for amplifying and delaying microwave signals comprising, in combination: a piezoelectric semiconductor element containing current carriers, said element having a pair of opposite end faces which are at an acute angle with respect to the longitudinal axis of symmetry of said element; a pair of microwave energy transmission sections, one end of each section being terminated by a surface portion of said element at a location adjacent a different end face such that the electrical field component of a microwave signal present at the end of one of said sections excites an acoustic signal in said element that is reflected from the adjacent end face, travels down said element, is reflected from the other end face and excites a microwave signal at the end of the other transmission section; and means for applying a DC potential across said end faces to cause said current carriers to drift down said element at a velocity sufficient to cause amplification of any acoustic signal also traveling down said element.
Claim 3
Dependent Claim
14 words
In an arrangement as defined in claim 1 wherein said end faces are parallel.
Claim 4
Dependent Claim
35 words
In an arrangement as defined in claim 2 wherein said piezoelectric semiconductor element has a pair of parallel sides and said microwave energy transmission sections are located on opposite sides of said piezoelectric semiconductor element.
Claim 5
Dependent Claim
21 words
In an arrangement as defined in claim 1 wherein said opposite end faces are angularly disposed with respect to each other.
Claim 6
Dependent Claim
38 words
In an arrangement as defined in claim 4 wherein said piezoelectric semiconductor element has a pair of parallel sides and said pair of microwave energy transmission sections are located on the same side of said piezoelectric semiconductor element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |