US4225966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power area collocation of transmitters
Assignee: United States Department of the Army
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Filing: 1970-10-06
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Granted: 1980-09-30
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Expires: 1990-10-06
Abstract
Abstract A method of collocating transmitters within a power area, utilizing the pr supply ripple frequency components contained in the modulation envelope of radio transmissions. Two or more signals are first detected and then filtered to extract the ripple frequency components. The phase relation between the ripple components is then compared, a constancy of relation indicating that both signals have the same AC power source, and thus that the transmitters are located in the same power area.
Inventors
- 👤 Thomas C. Blow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:29
CPC Classifications
G; G01; G01S; G01S1/00; G01S1/02; G01S1/08; G01S1/20
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
34 words
A method of collocating transmitters comprising the steps of: detecting at least two transmitted signals, the signals having ripple frequency components; and comparing the ripple frequency components of the signals to collocate the transmitters.
Claim 2
Independent Claim
34 words
A method of collocating transmitters comprising the steps of: detecting at least two transmitted signals, the signals having ripple frequency components; and comparing the ripple frequency components of the signals to collocate the transmitters.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein detecting includes selecting the ripple frequency components of the signals.
Claim 4
Dependent Claim
16 words
The method of claim 2 wherein detecting further includes bandpass filtering to select ripple frequency components.
Claim 5
Dependent Claim
13 words
The method of claim 3 wherein comparing includes separately tracing the ripple components.
Claim 6
Dependent Claim
19 words
The method of claim 4 wherein comparing further includes determining constancy of phase relation by collocating the separate traces.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein detecting includes detecting at least two modulated transmitted signals.
Claim 8
Dependent Claim
17 words
The method of claim 6 wherein detecting further includes detecting the amplitude envelopes of the modulated signals.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein filtering includes bandpass filtering the amplitude envelopes to select the ripple frequency components.
References Cited (Backward Citations)
US4146892A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-09-30 | 1984-03-31 | 1984-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-30 | 1988-03-31 | 1988-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-30 | 1992-03-31 | 1992-09-30 | $7700.00 | Window Closed / Lapsed |