Patent US4238796A successfully refreshed from Google Patents.
US4238796A
Expired / Lapsed
US
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Radio frequency pulse generator
Assignee: Honeywell Inc
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Filing: 1979-06-28
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Granted: 1980-12-09
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Expires: 1999-06-28
Abstract
Abstract A radio frequency pulse generator for use in a pulsed radar transmitter includes a reference oscillator of one radio frequency, a second oscillator producing a different second radio frequency which differs from a multiple M of the first frequency by a given amount and a third oscillator which is injection locked by the second oscillator to produce a subharmonic frequency of the second frequency and, when not transmitting, is injection locked by the first oscillator to thereby produce its frequency.
Inventors
- 👤 Daniel D. Mawhinney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:23
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/28; G01S7/282
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
168 words
A radio frequency pulse generator comprising in combination: a first means producing a first radio frequency signal at frequency F 1 ; a second means producing a second radio frequency signal at a second different frequency F 2 which differs from a multiple M of F 1 by a given amount, where M is an integer; a third means producing radio frequency signal F 3 ; means producing a control signal periodically alternating between a first value and a second value; means responsive to said control signal of said second value for causing said third means to be injection locked by said second means to thereby produce frequency F 3 =F 2 ÷M and responsive to said control signal at said first value for causing said third means to be injection locked by said first means to thereby produce frequency F 3 =F 1 ; and means responsive to said third means when producing said frequency F 3 =F 2 ÷M for providing said frequency F 3 .
Claim 2
Dependent Claim
168 words
A radio frequency pulse generator comprising in combination: a first means producing a first radio frequency signal at frequency F 1 ; a second means producing a second radio frequency signal at a second different frequency F 2 which differs from a multiple M of F 1 by a given amount, where M is an integer; a third means producing radio frequency signal F 3 ; means producing a control signal periodically alternating between a first value and a second value; means responsive to said control signal of said second value for causing said third means to be injection locked by said second means to thereby produce frequency F 3 =F 2 ÷M and responsive to said control signal at said first value for causing said third means to be injection locked by said first means to thereby produce frequency F 3 =F 1 ; and means responsive to said third means when producing said frequency F 3 =F 2 ÷M for providing said frequency F 3 .
Claim 3
Dependent Claim
51 words
The combination as set forth in claim 1 further including a subtractive mixer responsive to a multiple M of said frequency F 1 from said first means and responsive to said frequency F 2 from said second means for producing a 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
14 words
The combination of claim 1 wherein said first means is a transferred electron oscillator.
Claim 7
Dependent Claim
41 words
The combination of claim 1 wherein said means for providing said frequency F 3 comprises a radio frequency signal amplifier coupled to said third means for amplifying signals therefrom and a transmitting antenna for transmitting said amplified signals into the atmosphere.
Claim 8
Dependent Claim
20 words
The combination as set forth in claim 6 wherein said means responsive to said control signal is a switch means.
Claim 9
Dependent Claim
59 words
The combination as set forth in claim 1, wherein said switch means includes means responsive to said control signal for coupling said third means to said first means only when said control signal of said first value is present and coupling said third means to said second means only when said control signal of said second value is present.
Claim 10
Dependent Claim
71 words
The combinaton as set forth in claim 6 wherein said transmitting antenna is also a receiving antenna for receiving reflected signals of said frequency F 3 =F 2 ÷M and further including a mixer receptive of said received signals of frequency F 3 =F 2 ÷M and receptive of signal of frequency F 1 for producing a signal of frequency which is the difference of F 1 and F 3 .
References Cited (Backward Citations)
US4131861A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |