US3939411A
Expired / Lapsed
US
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Instantaneous frequency measurement system
Assignee: United States Department of the Navy
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Filing: 1974-10-03
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Granted: 1976-02-17
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Expires: 1994-10-03
Abstract
Abstract An improved instantaneous frequency measurement system which can measure se signals of differing frequencies emitted simultaneously by a single source. A conventional instantaneous frequency measurement detector is preceded by a gating device and a dispersive delay line which cooperate to transform the simultaneous signals into time sequential signals.
Inventors
- 👤 Wilbur G. James
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:55
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02; H; H04; H04L; H04L27/00; H04L27/10; H04L27/14; H04L27/156; H04L27/1563
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
115 words
Apparatus for measuring the frequencies of a plurality of simultaneously received pulse signals, comprising: sampling means having an input connected to receive said plurality of simultaneously received pulse signals for sampling a portion substantially less than one pulse of each of said input signals, phase shifting means connected to receive said sampled signals from said sampling means for producing output signals each shifted in phase by an amount related to the magnitude of its corresponding frequency, and instantaneous frequency measurement means connected to receive said output signals from said phase shifting means for producing an output signal having a measurement of the frequency of each of said plurality of simultaneously received pulse signals encoded therein.
Claim 2
Dependent Claim
115 words
Apparatus for measuring the frequencies of a plurality of simultaneously received pulse signals, comprising: sampling means having an input connected to receive said plurality of simultaneously received pulse signals for sampling a portion substantially less than one pulse of each of said input signals, phase shifting means connected to receive said sampled signals from said sampling means for producing output signals each shifted in phase by an amount related to the magnitude of its corresponding frequency, and instantaneous frequency measurement means connected to receive said output signals from said phase shifting means for producing an output signal having a measurement of the frequency of each of said plurality of simultaneously received pulse signals encoded therein.
Claim 3
Dependent Claim
66 words
The apparatus of claim 1, wherein said sampling means comprises: detector means for producing an output signal upon the detection of the leading edge of each of said plurality of simultaneously received pulse signals, and gate means connected to receive said output signal from said detector means for gating said plurality of simultaneously received signals upon the occurrence of said output signal from said detector means.
Claim 4
Dependent Claim
15 words
The apparatus of claim 2, wherein said phase shifting means comprises a dispersive delay line.
Claim 5
Dependent Claim
28 words
The apparatus of claim 3 wherein said dispersive delay line provides a phase shift of magnitude directly proportional to the magnitude of the frequency of said input signal.
Claim 6
Dependent Claim
111 words
In an instantaneous frequency measurement system adapted for receiving pulse signals, the improvement, whereby a plurality of pulse signals of unequal frequency may be simultaneously received and measured, comprising: sampling means connected to receive said plurality of signals for producing therefrom sampled signals being substantially less than one pulse of each of said plurality of signals, and phase shifting means connected to receive said sampled signals from said sampling means for producing output signals representing output signals from said sampling means shifted in phase by an amount related to their frequency with said output signals from said pulse shifting means being connected to the input of said instantaneous frequency measurement system.
Claim 7
Dependent Claim
111 words
In an instantaneous frequency measurement system adapted for receiving pulse signals, the improvement, whereby a plurality of pulse signals of unequal frequency may be simultaneously received and measured, comprising: sampling means connected to receive said plurality of signals for producing therefrom sampled signals being substantially less than one pulse of each of said plurality of signals, and phase shifting means connected to receive said sampled signals from said sampling means for producing output signals representing output signals from said sampling means shifted in phase by an amount related to their frequency with said output signals from said pulse shifting means being connected to the input of said instantaneous frequency measurement system.
Claim 8
Dependent Claim
70 words
The apparatus of claim 5 wherein said sampling means comprises, detector means for producing an output signal upon the detection of the leading edge of a pulse of each of said plurality of pulse signals of unequal frequency, and gate means connected to receive said output signal from said sampling means for producing said output signal from said sampling means each time said output signal from said detector means occurs.
Claim 9
Dependent Claim
15 words
The apparatus of claim 6 wherein said phase shifting means comprises a dispersive delay line.
Claim 10
Dependent Claim
18 words
The apparatus of claim 7 wherein said dispersive delay line produces a phase shift directly proportional to frequency.
Claim 11
Dependent Claim
25 words
The apparatus of claim 8 wherein said output signals from said sampling means comprises one-tenth of one pulse of each of said plurality of signals.
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) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |