Patent US1941489A successfully refreshed from Google Patents.
Patent US3694753A successfully refreshed from Google Patents.
US3694753A
Expired / Lapsed
US
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System for improving signal-to-noise ratio of a communication signal
Assignee: Individual
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Filing: 1970-08-07
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Granted: 1972-09-26
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Expires: 1990-08-07
Abstract
Abstract A superconductive resonant cavity is energized with radiofrequency energy. The cavity includes a tuning stub having a piece of semiconductor material mounted on the end thereof. An incoming communication signal modulates a light source optically coupled to the semiconductor by a fiber optic bundle. This varies the dielectric constant of the semiconductor which, in turn, varies the resonant frequency of the cavity. An angle modulation demodulator senses the frequency of the radio-frequency oscillations in the cavity and produces a replica of the communication signal with improved signal-to-noise ratio.
Inventors
- 👤 George D Arndt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:26
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/1027
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A system for improving the signal-to-noise ratio of a communication signal comprising: means for supplying a communication signal; means including a resonant cavity for producing an oscillatory signal, said latter means including means for energizing the resonant cavity with radio-frequency energy; means responsive to the communication signal for controlling the resonant frequency of the resonant cavity, said means for controlling the resonant frequency including a tuning stub within said cavity, a piece of semi-conductor material on one end of the tuning stub and forming a part of the tuning mechanism; radiant energy emitting means; means responsive to the communication signal for controlling the intensity of the radiant energy emitted by the radiant energy emitting means; means for directing the radiant energy upon the semiconductor material for controlling the dielectric properties thereof and the effective electrical length of the turning stub; and means responsive to the resonant cavity oscillatory signal for producing a replica of the communication signal having an improved signal-to-noise ratio.
Claim 2
Independent Claim
162 words
A system for improving the signal-to-noise ratio of a communication signal comprising: means for supplying a communication signal; means including a resonant cavity for producing an oscillatory signal, said latter means including means for energizing the resonant cavity with radio-frequency energy; means responsive to the communication signal for controlling the resonant frequency of the resonant cavity, said means for controlling the resonant frequency including a tuning stub within said cavity, a piece of semi-conductor material on one end of the tuning stub and forming a part of the tuning mechanism; radiant energy emitting means; means responsive to the communication signal for controlling the intensity of the radiant energy emitted by the radiant energy emitting means; means for directing the radiant energy upon the semiconductor material for controlling the dielectric properties thereof and the effective electrical length of the turning stub; and means responsive to the resonant cavity oscillatory signal for producing a replica of the communication signal having an improved signal-to-noise ratio.
Claim 3
Dependent Claim
20 words
A system in accordance with claim 1 and further including means for maintaining the resonant cavity at a superconductive temperature.
Claim 4
Dependent Claim
43 words
A system in accordance with claim 1 wherein the radiant energy emitting means includes a source of radiant energy located outside of the resonant cavity and a fiber optic bundle for conveying the radiant energy to the semiconductor material inside the resonant cavity.
Claim 5
Dependent Claim
45 words
A system in accordance with claim 3 wherein the means for controlling the intensity of the radiant energy includes circuit means for varying the intensity of the radiant energy produced by the radiant energy source in accordance with the instantaneous amplitude of the communication signal.
Claim 6
Dependent Claim
22 words
A system in accordance with claim 1 wherein the means responsive to the resonant cavity oscillatory signal includes an angle modulation demodulator.
Claim 7
Dependent Claim
55 words
A system in accordance with claim 1 wherein the system is coupled in a communication receiver with the means for supplying the communication signal being the front end portion of the receiver and the means responsive to the resonant cavity oscillatory signal being coupled to feed the replica signal to the remainder of the receiver.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |