Patent US4241345A successfully refreshed from Google Patents.
US4241345A
Expired / Lapsed
US
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Pulse radar transmitting oscillator
Assignee: Honeywell Inc
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Filing: 1979-05-31
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Granted: 1980-12-23
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Expires: 1999-05-31
Abstract
Abstract An oscillator circuit for use in a pulsed radar transmitter includes a reference oscillator of one frequency of, a voltage controlled oscillator controlled to transmit a radio frequency at a different frequency, and a switch for connecting the two oscillators together to inject lock the voltage controlled oscillator to the frequency of the reference oscillator when no transmitting is occurring.
Inventors
- 👤 Henry C. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:51
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
131 words
A pulsed radar oscillator comprising in combination: a first means producing a signal of a given radio frequency f 1 ; a second means normally adapted to produce a signal of a second different radio frequency f 2 but responsive to the application of said signal of frequency f 1 thereto for producing frequency f 1 ; means responsive to said second means for transmitting said frequency f 2 when produced thereby; means producing a succession of time spaced pulses of one value alternating with a succession of time spaced pulses of another value; and means responsive to said pulses of one value for applying said frequency f 1 to said second means and responsive to said pulses of another value for removing said frequency f 1 from said second means.
Claim 2
Dependent Claim
131 words
A pulsed radar oscillator comprising in combination: a first means producing a signal of a given radio frequency f 1 ; a second means normally adapted to produce a signal of a second different radio frequency f 2 but responsive to the application of said signal of frequency f 1 thereto for producing frequency f 1 ; means responsive to said second means for transmitting said frequency f 2 when produced thereby; means producing a succession of time spaced pulses of one value alternating with a succession of time spaced pulses of another value; and means responsive to said pulses of one value for applying said frequency f 1 to said second means and responsive to said pulses of another value for removing said frequency f 1 from said second means.
Claim 3
Dependent Claim
43 words
The combination as set forth in claim 1 further including a subtractive mixer responsive to said frequency f 1 from said first means and responsive to said frequency f 2 for producing the difference frequency thereof, said difference frequency being an intermediate frequency.
Claim 4
Dependent Claim
17 words
The combination as set forth in claim 2 wherein said second means is a voltage controlled oscillator.
Claim 5
Dependent Claim
44 words
The combination as set forth in claim 3 further including means responsive to said intermediate frequency for producing a control voltage which is a function of said intermediate frequency, said control voltage being applied to said voltage controlled oscillator to control the frequency thereof.
Claim 6
Dependent Claim
75 words
The combination as set forth in claim 4 wherein said mixer produces said intermediate frequency only when said second means is producing said frequency f 2 and further including means responsive to said means producing a succession of time spaced pulses and to said control voltage for sampling said control voltage when said pulses of another value are present and for storing said control voltage so sampled when said pulses of one value are present.
Claim 7
Dependent Claim
14 words
The combination of claim 1 wherein said first means is a transferred electron oscillator.
Claim 8
Dependent Claim
41 words
The combination of claim 1 wherein said means for transmitting said frequency f 2 comprises a radio frequency signal amplifier coupled to said second means for amplifying signals therefrom and a transmitting antenna for transmitting said amplified signals into the atmosphere.
Claim 9
Dependent Claim
16 words
The combination of claim 7 wherein said means responsive to said pulses is a switch means.
Claim 10
Dependent Claim
48 words
The combination of claim 8 wherein said switch means couples said first means to said second means only when said pulses of said one value are present and coupling said first means to said radio frequency signal amplifier only when said pulse of said another value are present.
Claim 11
Dependent Claim
64 words
The combination as set forth in claim 7 wherein said transmitting antenna is also a receiving antenna for receiving reflected signals of said frequency f 2 and further including a mixer receptive of said received signals of frequency f 2 and receptive of said frequency f 1 for producing a signal of frequency which is the difference of f 1 and f 2 .
References Cited (Backward Citations)
US3706048A
Cited
US4176351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-23 | 1984-06-23 | 1984-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-23 | 1988-06-23 | 1988-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-23 | 1992-06-23 | 1992-12-23 | $7700.00 | Window Closed / Lapsed |