US3879732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-directional barrage jamming system
Assignee: Maxson Electronics Corp
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Filing: 1959-04-28
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Granted: 1975-04-22
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Expires: 1979-04-28
Abstract
Abstract 1. A jammer for radars or the like operating in a given frequency band, comprising an antenna system having an elongated radiation aperture and means for producing a multiplicity of simultaneous directional radiation beams, said means including a multiplicity of feed lines each connected so as to produce one of said beams, a plurality of fixed-tuned radio receivers each connected to one of said feed lines and having a radio frequency bandwidth sufficient to encompass said given frequency band, a transmitter for producing jamming waves having components extending throughout said given frequency band, a switching means connecting said transmitter to each feed line and responsive to the receiver connected to the same feed line, for causing said antenna system to radiate jamming waves in every direction from which signals of a predetermined amplitude are received.
Inventors
- 👤 Murray Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:07
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/38
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
134 words
A jammer for radars or the like operating in a given frequency band, comprising an antenna system having an elongated radiation aperture and means for producing a multiplicity of simultaneous directional radiation beams, said means including a multiplicity of feed lines each connected so as to produce one of said beams, a plurality of fixed-tuned radio receivers each connected to one of said feed lines and having a radio frequency bandwidth sufficient to encompass said given frequency band, a transmitter for producing jamming waves having components extending throughout said given frequency band, a switching means connecting said transmitter to each feed line and responsive to the receiver connected to the same feed line, for causing said antenna system to radiate jamming waves in every direction from which signals of a predetermined amplitude are received.
Claim 2
Dependent Claim
134 words
A jammer for radars or the like operating in a given frequency band, comprising an antenna system having an elongated radiation aperture and means for producing a multiplicity of simultaneous directional radiation beams, said means including a multiplicity of feed lines each connected so as to produce one of said beams, a plurality of fixed-tuned radio receivers each connected to one of said feed lines and having a radio frequency bandwidth sufficient to encompass said given frequency band, a transmitter for producing jamming waves having components extending throughout said given frequency band, a switching means connecting said transmitter to each feed line and responsive to the receiver connected to the same feed line, for causing said antenna system to radiate jamming waves in every direction from which signals of a predetermined amplitude are received.
Claim 3
Dependent Claim
134 words
A jammer for radars or the like operating in a given frequency band, comprising an antenna system having an elongated radiation aperture and means for producing a multiplicity of simultaneous directional radiation beams, said means including a multiplicity of feed lines each connected so as to produce one of said beams, a plurality of fixed-tuned radio receivers each connected to one of said feed lines and having a radio frequency bandwidth sufficient to encompass said given frequency band, a transmitter for producing jamming waves having components extending throughout said given frequency band, a switching means connecting said transmitter to each feed line and responsive to the receiver connected to the same feed line, for causing said antenna system to radiate jamming waves in every direction from which signals of a predetermined amplitude are received.
Claim 4
Dependent Claim
134 words
A jammer for radars or the like operating in a given frequency band, comprising an antenna system having an elongated radiation aperture and means for producing a multiplicity of simultaneous directional radiation beams, said means including a multiplicity of feed lines each connected so as to produce one of said beams, a plurality of fixed-tuned radio receivers each connected to one of said feed lines and having a radio frequency bandwidth sufficient to encompass said given frequency band, a transmitter for producing jamming waves having components extending throughout said given frequency band, a switching means connecting said transmitter to each feed line and responsive to the receiver connected to the same feed line, for causing said antenna system to radiate jamming waves in every direction from which signals of a predetermined amplitude are received.
Claim 5
Dependent Claim
55 words
A jammer according to claim 1, including sidelobe suppression means connected to each switching means for preventing said switching means from connecting the transmitter to its feed line, and receiving means connected to said antenna for receiving signals having a greater amplitude than sidelobe signals of said antenna and for operating said sidelobe suppression means.
Claim 6
Dependent Claim
30 words
A jammer according to claim 1, wherein the transmitter comprises a plurality of parallel connected Carcinotron oscillators, and electrical noise sources connected to the Carcinotron oscillators for frequency modulating them.
Claim 7
Dependent Claim
22 words
A jammer according to claim 1, wherein the transmitter comprises a plurality of series connected wide frequency band traveling wave tube amplifiers.
Claim 8
Dependent Claim
29 words
A jammer according to claim 1, including means responsive to the reception of a signal of a predeterined amplitude by one of said receivers for rendering the transmitter operative.
Claim 9
Dependent Claim
27 words
A jammer according to claim 5, including means for periodically switching off the transmitter for a fixed interval during jamming to provide ''''look-thru'''' operation of the jammer.
Claim 10
Dependent Claim
29 words
A jammer according to claim 1, including modulators connected to transmitter and means for energizing the several modulators non-coherently and connecting the outputs thereof to all feed lines simultaneously.
References Cited (Backward Citations)
US2885543A
Cited
US2862204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |