US3766482A
Expired / Lapsed
US
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Radiant energy receivers
Assignee: TDK Micronas GmbH
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Filing: 1971-03-22
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Granted: 1973-10-16
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Expires: 1991-03-22
Abstract
Abstract A satellite navigation receiver including two IF''s and a phase locked loop. A signal generator produces synchronized signals of a constant frequency for the second mixer, phase detection and a doppler detection. The first mixer L.O. port and a doppler mixer receive a common input from a frequency multiplier and power divider. The multiplier input is supplied by the loop voltage controlled oscillator. Synchronized signals are economically obtained from one stable oscillator through the use of frequency multipliers, frequency dividers and another mixer.
Inventors
- 👤 S Ifune
- 👤 H Brown
- 👤 D Keilen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:24
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02; G01S11/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
342 words
A radiant energy receiver comprising: a first mixer; first means to impress an incoming signal of a frequency fa on one input to said first mixer; a voltage controlled oscillator having a frequency fb; second means connected from said voltage controlled oscillator to impress another signal on the other input of said first mixer of a frequency fc directly proportional to fb; a second mixer; third means connected from the output of said first mixer to one input of said second mixer to filter the output of said first mixer and pass a signal to said second mixer of a frequency fd, where fd fa - fc; a constant frequency oscillator having a frequency of oscillation fn; fourth means connected from said constant frequency oscillator to the other input of said second mixer to impress a signal thereon of a frequency fe; a phase detector; fifth means connected from the output of said second mixer to an input of said phase detector to filter the output of said second mixer and impress a signal on said phase detector of a frequency fc, where ff fd - fe; a 45* phase shifter having its output connected to the other input of said phase detector; sixth means connected from said constant frequency oscillator to impress a signal on the input of said phase shifter of a frequency ff; seventh means connected from the output of said phase detector to the input of said voltage controlled oscillator to cause it to change its oscillation frequency in a manner such that said frequency fd remains substantially constant if the frequency or phase fa changes; a third mixer, said second means being connected to one input of said third mixer to supply an input signal thereto of a frequency fc; eighth means connected from said constant frequency oscillator to the other input of said third mixer to supply a signal thereto of a frequency fg; a low pass filter connected from the output of said third mixer; and a utilization device connected from said low pass filter.
Claim 2
Dependent Claim
342 words
A radiant energy receiver comprising: a first mixer; first means to impress an incoming signal of a frequency fa on one input to said first mixer; a voltage controlled oscillator having a frequency fb; second means connected from said voltage controlled oscillator to impress another signal on the other input of said first mixer of a frequency fc directly proportional to fb; a second mixer; third means connected from the output of said first mixer to one input of said second mixer to filter the output of said first mixer and pass a signal to said second mixer of a frequency fd, where fd fa - fc; a constant frequency oscillator having a frequency of oscillation fn; fourth means connected from said constant frequency oscillator to the other input of said second mixer to impress a signal thereon of a frequency fe; a phase detector; fifth means connected from the output of said second mixer to an input of said phase detector to filter the output of said second mixer and impress a signal on said phase detector of a frequency fc, where ff fd - fe; a 45* phase shifter having its output connected to the other input of said phase detector; sixth means connected from said constant frequency oscillator to impress a signal on the input of said phase shifter of a frequency ff; seventh means connected from the output of said phase detector to the input of said voltage controlled oscillator to cause it to change its oscillation frequency in a manner such that said frequency fd remains substantially constant if the frequency or phase fa changes; a third mixer, said second means being connected to one input of said third mixer to supply an input signal thereto of a frequency fc; eighth means connected from said constant frequency oscillator to the other input of said third mixer to supply a signal thereto of a frequency fg; a low pass filter connected from the output of said third mixer; and a utilization device connected from said low pass filter.
Claim 3
Dependent Claim
68 words
The invention as defined in claim 1, wherein fa varies approximately within the range of 399,968 + or - 8 KHz, said second means including a X 18 frequency multiplier, when fb 20.692 MHz, fc 372.468 MHz, said fourth means including a X 4 frequency multiplier, the input signal to said second mixer from said fourth means being 20 MHz, said frequency fg being equal to 372.5 MHz.
Claim 4
Dependent Claim
131 words
The invention as defined in claim 2, wherein said constant frequency oscillator includes a first power divider connected to said fourth means multiplier, a fourth mixer; a X 5 frequency multiplier, a Divided by 2 frequency divider and a X 25 frequency multiplier connected in succession from said first power divider to one input of said fourth mixer; a X 3 frequency multiplier, a second power divider, and a X 4 frequency multiplier connected in succession from said first power divider to the other input of said fourth mixer; an amplifier and a 372.5 MHz filter connected in succession from the output of said fourth mixer to said other input of said third mixer; and a Divided by 2 frequency divider connected from said second power divider to said phase shifter.
Claim 5
Dependent Claim
66 words
The invention as defined in claim 1, wherein fa varies approximately within the range of 399,968 + or - 8 KHz, fc being equal to 372.468 MHz when fa is equal to 399.968 MHz, said fourth means including a X 4 frequency multiplier, the input signal to said second mixer from said fourth means being 20 MHz, the said frequency fg being equal to 372.5 MHz.
Claim 6
Dependent Claim
116 words
The invention as defined in claim 4, wherein said fourth means includes a frequency multiplier, a fourth mixer, ninth means to impress a signal on one input of said fourth mixer of a frequency 125 fn/2 , said ninth means being connected from said constant frequency oscillator to said one input of said fourth mixer, tenth means connected from said constant frequency oscillator to the other input of said fourth mixer to impress a signal thereon of a frequency 12fn, said eighth means being connected from the output of said fourth mixer to the said other input of said third mixer, one signal at the output of said fourth mixer having a frequency of 372.5 MHz.
Claim 7
Dependent Claim
60 words
The invention as defined in claim 5, wherein a X 3 frequency multiplier and a X 4 frequency multiplier are connected in succession from said constant frequency multiplier to the said other input of said fourth mixer, and a Divided by 2 frequency divider connected from the output of said X 3 multiplier to the input of said phase shifter.
Claim 8
Dependent Claim
201 words
A radiant energy receiver comprising: a phase locked loop including a first mixer, a voltage controlled oscillator and first means connected from said voltage controLled oscillator to supply said first mixer with one input signal of a frequency fc directly proportional to that of the voltage controlled oscillator output signal, said loop including a phase shifter, second means including a phase detector responsive to the output of said first mixer and connected from said phase shifter to vary the control voltage on said voltage controlled oscillator in a manner to reduce the phase shift of the output of said first mixer toward zero; a constant frequency oscillator; third means connected from said constant frequency oscillator to the input of said phase shifter to supply a signal thereto directly proportional to that of the output of said constant frequency oscillator; a second mixer having one input connected from said first means in a manner to receive a signal of said frequency fc; and fourth means connected from said constant frequency oscillator to the other input of said second mixer to supply the same with a signal of a frequency directly proportional to that of the output signal of said constant frequency oscillator.
Claim 9
Dependent Claim
201 words
A radiant energy receiver comprising: a phase locked loop including a first mixer, a voltage controlled oscillator and first means connected from said voltage controLled oscillator to supply said first mixer with one input signal of a frequency fc directly proportional to that of the voltage controlled oscillator output signal, said loop including a phase shifter, second means including a phase detector responsive to the output of said first mixer and connected from said phase shifter to vary the control voltage on said voltage controlled oscillator in a manner to reduce the phase shift of the output of said first mixer toward zero; a constant frequency oscillator; third means connected from said constant frequency oscillator to the input of said phase shifter to supply a signal thereto directly proportional to that of the output of said constant frequency oscillator; a second mixer having one input connected from said first means in a manner to receive a signal of said frequency fc; and fourth means connected from said constant frequency oscillator to the other input of said second mixer to supply the same with a signal of a frequency directly proportional to that of the output signal of said constant frequency oscillator.
References Cited (Backward Citations)
US3603885A
Cited
US3600699A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |