US4051439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Short pulse magnetron transmitter
Assignee: United States Department of the Navy
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Filing: 1972-11-02
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Granted: 1977-09-27
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Expires: 1992-11-02
Abstract
Abstract A magnetron transmitter having a two-stage modulator, one stage generating long, slowly rising, low power pulse, and the other generating a short, high power pulse, whereby high resolution is obtainable without the use of pulse compression techniques.
Inventors
- 👤 Reuben E. Nyswander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:48
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/28; H03C1/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
108 words
A short pulse magnetron transmitter, comprising: a control signal input; a long pulse generator coupled to said input for generating a long, low power level pulse in response to said control signal; a short pulse generator coupled to said input for generating a short, high power level pulse in response to said control signal, including means for delaying the generation of said short, high power level pulse; a magnetron coupled to said long pulse generator and said short pulse generator such that said magnetron is placed in oscillation by said long, low power level pulse and is driven to high power by said short, high power level pulse.
Claim 2
Dependent Claim
108 words
A short pulse magnetron transmitter, comprising: a control signal input; a long pulse generator coupled to said input for generating a long, low power level pulse in response to said control signal; a short pulse generator coupled to said input for generating a short, high power level pulse in response to said control signal, including means for delaying the generation of said short, high power level pulse; a magnetron coupled to said long pulse generator and said short pulse generator such that said magnetron is placed in oscillation by said long, low power level pulse and is driven to high power by said short, high power level pulse.
Claim 3
Dependent Claim
25 words
The transmitter of claim 2 wherein said long pulse generator includes a first thyratron switch and said short pulse generator includes a second thyratron switch.
Claim 4
Dependent Claim
28 words
The transmitter of claim 2 wherein said long pulse generator further includes a plurality of inductance means for isolating said long pulse generator from said short pulse generator.
Claim 5
Dependent Claim
52 words
The transmitter of claim 3 wherein said long pulse generator further includes a trigger generator for triggering said first thyratron switch in response to said control input, and said short pulse generator further includes a trigger generator for triggering said second thyratron switch in response to the output of said delaying means.
Claim 6
Dependent Claim
32 words
The transmitter of claim 4 wherein said delaying means is a delay generator coupled to said control unit and said second trigger generator is coupled to the output of said delay generator.
Claim 7
Dependent Claim
73 words
The transmitter of claim 5 further comprising a power supply circuit coupled to said first and said second thyratron switches, including a voltage supply, a first rectifier coupled between the voltage supply and the anode of said first thyratron switch, a second rectifier coupled between the voltage supply and the anode of said second thyratron switch, and a reverse current diode coupled between the voltage supply and the common ground of the transmitter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |