Patent US3657656A successfully refreshed from Google Patents.
US3657656A
Expired / Lapsed
US
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Switched high power pulsed array
Assignee: Westinghouse Electric Corp
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Filing: 1970-10-08
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Granted: 1972-04-18
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Expires: 1990-10-08
Abstract
Abstract A time domain power divider wherein a relatively long coherent RF pulse is separated into a plurality of relatively shorter length pulses having substantially the same peak power as the input pulse by coupling a plurality of low loss type waveguide switches to a common waveguide section propagating a relatively long input pulse. The plurality of waveguide switches are selectively separated over a length of the waveguide and operated in timed relationship with respect to the input pulse wherein the pulsewidth of the relatively long input pulse is at least equal to the total span of the plurality of waveguide switches. The relatively shorter coherent RF pulses formed from the input pulse are then respectively coupled to separate antenna means through controlled phase shifters to provide a phase array output of microwave energy.
Inventors
- 👤 Herbert W Cooper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:39
CPC Classifications
H; H01; H01Q; H01Q3/00; H01Q3/26; H01Q3/30; H01Q3/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
237 words
An RF microwave system for deriving a plurality of very short high peak power microwave pulses from a single high power microwave pulse of a relatively long pulsewidth, comprising, in combination: an RF pulse generator for providing a relatively long pulsewidth input microwave pulse of electromagnetic energy; a common waveguide transmission line connected at one end to said RF pulse generator whereby said input microwave pulse can be propagated therethrough; an RF termination coupled to the other end of said waveguide transmission line for preventing substantially any reflection of said input microwave pulse back towards said RF pulse generator; a plurality of low loss signal controlled waveguide switches coupled to said common waveguide transmission line along its length and having selective mutual spacing therebetween with the total span of all said spacings being at least equal to the pulsewidth of said input microwave pulse; triggering means coupled to all of said plurality of low loss waveguide switches for operating said waveguide switches in timed relationship with the occurrence of said input microwave pulse propagating in said common waveguide transmission line for dividing the pulsewidth of said input microwave pulse into a plurality of microwave output pulses of a relatively shorter pulsewidth having a peak power in the order of the peak power comprising the input microwave pulse; and microwave means coupled to each of said plurality of microwave switches for propagating a respective microwave output pulse therefrom.
Claim 2
Dependent Claim
237 words
An RF microwave system for deriving a plurality of very short high peak power microwave pulses from a single high power microwave pulse of a relatively long pulsewidth, comprising, in combination: an RF pulse generator for providing a relatively long pulsewidth input microwave pulse of electromagnetic energy; a common waveguide transmission line connected at one end to said RF pulse generator whereby said input microwave pulse can be propagated therethrough; an RF termination coupled to the other end of said waveguide transmission line for preventing substantially any reflection of said input microwave pulse back towards said RF pulse generator; a plurality of low loss signal controlled waveguide switches coupled to said common waveguide transmission line along its length and having selective mutual spacing therebetween with the total span of all said spacings being at least equal to the pulsewidth of said input microwave pulse; triggering means coupled to all of said plurality of low loss waveguide switches for operating said waveguide switches in timed relationship with the occurrence of said input microwave pulse propagating in said common waveguide transmission line for dividing the pulsewidth of said input microwave pulse into a plurality of microwave output pulses of a relatively shorter pulsewidth having a peak power in the order of the peak power comprising the input microwave pulse; and microwave means coupled to each of said plurality of microwave switches for propagating a respective microwave output pulse therefrom.
Claim 3
Dependent Claim
31 words
The invention as defined by claim 1 wherein said RF pulse generator comprises a coherent source of microwave energy for propagating a coherent microwave pulse through said common waveguide transmission line.
Claim 4
Dependent Claim
46 words
The invention as defined by claim 2 and additionally including synchronizer means coupled to said coHerent RF pulse generator and said triggering means for providing said predetermined timed relationship between the operation of said plurality of waveguide switches and the propagation of said input microwave pulse.
Claim 5
Dependent Claim
35 words
The invention as defined by claim 3 and wherein said triggering means comprises a pulse source generating a common pulse signal applied to all of said waveguide switches for rendering them selectively conducting and non-conducting.
Claim 6
Dependent Claim
47 words
The invention as defined by claim 4 and additionally including time delay means coupled between said triggering means and said plurality of microwave switches for controlling the time of arrival of said control pulse to the respective microwave switches in timed relationship with said input microwave pulse.
Claim 7
Dependent Claim
33 words
The invention as defined by claim 5 and additionally including control means coupled to said time delay means for selectively altering the time delay of said control pulse to the respective microwave switches.
Claim 8
Dependent Claim
30 words
The invention as defined by claim 6 wherein said time delay means comprises a separate time delay circuit coupled between said triggering means and all of said respective microwave switches.
Claim 9
Dependent Claim
24 words
The invention as defined by claim 7 wherein said plurality of low loss signal controlled waveguide switches comprises waveguide switches of a thyratron type.
Claim 10
Dependent Claim
47 words
The invention as defined by claim 1 wherein said waveguide switches comprises thyratron waveguide switches and said microwave means coupled to the output of each of said plurality of microwave switches comprises an antenna for providing an array for selectively radiating all of said microwave output pulses.
Claim 11
Dependent Claim
52 words
The invention as defined by claim 9 and wherein said microwave means additionally includes electrically controlled phase shifter means coupled between said plurality of thyratron microwave switches and the respective antennas for providing a means of controlling radiation of said microwave output pulses from said antenna array in a selected scanned direction.
Claim 12
Dependent Claim
28 words
The invention as defined by claim 10 and additionally including phase control means coupled to said phase shifter means for controlling the scan direction of said antenna array.
References Cited (Backward Citations)
US3458817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |