US3631484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Harmonic detection system
Assignee: Microlab FXR LLC
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Filing: 1969-07-30
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Granted: 1971-12-28
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Expires: 1989-07-30
Abstract
Abstract A detection system comprising a transmitter for radiating signal of frequency ''''F'''' to a harmonic generator. The generator is adapted to produce a signal of frequency '''' XF+ XD'''' where XF is a harmonic of the transmitted signal and XD is a frequency shift due to the movement of the generator. A receiver includes a multiplier connected to the transmitter for producing a signal XF and a mixer adapted to receive the harmonic generator signal and the multiplier signal for producing a signal proportional to the difference therebetween.
Inventors
- 👤 Harry A Augenblick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:59
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/74; G01S13/75; G01S13/751; G01S13/753; G01S13/02; G01S13/50; G01S13/58
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
140 words
A detection system comprising a transmitter including signalgenerating means for generating a signal having a preselected frequency, and radiating means connected to said signalgenerating means for radiating said signal of preselected frequency, a passive harmonic generator means operable to receive said preselected frequency signal for generating an output signal having a frequency equal to a harmonic greater than said preselected frequency plus a differential proportional to the speed of said harmonic generator means; and receiving means for detecting the movement of said harmonic generator means; said receiving means comprising an antenna for receiving said output signal, multiplier means connected to said signal-generating means for producing a signal of frequency equal to said harmonic, and mixing means connected to said antenna and said multiplier means for producing a signal proportional to the difference in frequency between said output and harmonic signals.
Claim 2
Dependent Claim
140 words
A detection system comprising a transmitter including signalgenerating means for generating a signal having a preselected frequency, and radiating means connected to said signalgenerating means for radiating said signal of preselected frequency, a passive harmonic generator means operable to receive said preselected frequency signal for generating an output signal having a frequency equal to a harmonic greater than said preselected frequency plus a differential proportional to the speed of said harmonic generator means; and receiving means for detecting the movement of said harmonic generator means; said receiving means comprising an antenna for receiving said output signal, multiplier means connected to said signal-generating means for producing a signal of frequency equal to said harmonic, and mixing means connected to said antenna and said multiplier means for producing a signal proportional to the difference in frequency between said output and harmonic signals.
Claim 3
Dependent Claim
32 words
In a detection system as in claim 1, and frequency-modulating means connected to said signal-generating means to vary the frequency of the signal produced by said signal-generating means about said preselected frequency.
Claim 4
Dependent Claim
20 words
In a detection system according to claim 1, in which said harmonic-generating means comprises a diode connected to an antenna.
Claim 5
Dependent Claim
28 words
In a detection system as in claim 3, and biasing means to operate said diode at a predetermined point on its characteristic curve to change the impedance thereof.
Claim 6
Dependent Claim
27 words
In a detection system as in claim 4, in which said biasing means comprises a source of varying potential to modulate the signals generated by said diode.
Claim 7
Dependent Claim
23 words
In a detection system according to claim 1, in which said harmonic-generating means comprises a diode connected between a receiving and transmitting antenna.
Claim 8
Dependent Claim
30 words
In a detection and navigation system as in claim 1, and a filter connected to said harmonic-generating means for attenuating all signals except a preselected one of said harmonic signals.
Claim 9
Dependent Claim
26 words
In a detection system as in claim 1, and indicating means responsive to said mixing means signal for indicating the movement of said harmonic generator means.
Claim 10
Dependent Claim
29 words
In a detection system as in claim 3, and frequency-detecting means responsive to said mixing means signal for producing an indication proportional to the frequency of said mixing means.
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |