Patent US5294936A successfully refreshed from Google Patents.
US5294936A
Expired / Lapsed
US
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Radar sector blanker
Assignee: United States Department of the Navy
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Filing: 1993-06-07
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Granted: 1994-03-15
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Expires: 2013-06-07
Abstract
Abstract A radar sector blanker comprises an analog-to-digital converter and a sec controller unit. The analog-to-digital converter receives the analog synchro voltages describing the positioning of a radar antenna and changes these voltages into binary-coded decimal (BCD) information. The sector controller unit comprises a portable housing, a controller system, and a power supply. The controller system includes an OFF comparator circuit, an ON comparator circuit, an S-R latch, and a solid-state switch. Each comparator circuit comprises three cascaded transistor-transistor logic (TTL) integrated chips. The power supply gives a direct-current voltage to the solid-state switch and the TTL chips. The sector blanker blocks transmission for a pre-determined rotational region or sector of a radar system.
Inventors
- 👤 Roger B. Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:38
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/40; G01S7/4004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
151 words
A system for blanking transmission of a radar system having an analog synchro voltage, comprising: a portable housing; means, connected to said portable housing, for converting the analog synchro voltage into binary-coded decimal information; first means, electrically connected in series to said means for converting and positioned within said portable housing, for comparing the binary-coded decimal information to a predetermined rotational positioning of a radar antenna; second means, electrically connected in series to said means for converting and in parallel to said first means for comparing, for comparing the binary-coded decimal information to a second predetermined rotational positioning of the radar antenna; means, electrically connected in series to said first and second means for comparing, for latching outputs of said first and second means for comparing; and means, electrically connected to said means for latching and to the radar system, for switching off and on the transmission of the radar system.
Claim 2
Independent Claim
151 words
A system for blanking transmission of a radar system having an analog synchro voltage, comprising: a portable housing; means, connected to said portable housing, for converting the analog synchro voltage into binary-coded decimal information; first means, electrically connected in series to said means for converting and positioned within said portable housing, for comparing the binary-coded decimal information to a predetermined rotational positioning of a radar antenna; second means, electrically connected in series to said means for converting and in parallel to said first means for comparing, for comparing the binary-coded decimal information to a second predetermined rotational positioning of the radar antenna; means, electrically connected in series to said first and second means for comparing, for latching outputs of said first and second means for comparing; and means, electrically connected to said means for latching and to the radar system, for switching off and on the transmission of the radar system.
Claim 3
Dependent Claim
45 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 further comprising means, connected to said first and second means for comparing and to said means for switching, for supplying electrical power to the blanking system.
Claim 4
Dependent Claim
47 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 further comprising an OFF switch, connected to a front panel of said portable housing, for selecting a rotational positioning where transmission of the radar system is turned off.
Claim 5
Dependent Claim
47 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 further comprising an ON switch, connected to a front panel of said portable housing, for selecting a rotational positioning where transmission of the radar system is turned on.
Claim 6
Dependent Claim
41 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 wherein said first means for comparing comprises three 7485N four-bit, magnitude comparator integrated chips connected in cascade, each chip using transistor-transistor logic.
Claim 7
Dependent Claim
41 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 wherein said second means for comparing comprises three 7485N four-bit, magnitude comparator integrated chips connected in cascade, each chip using transistor-transistor logic.
Claim 8
Dependent Claim
32 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 wherein said means for latching comprises a 7402N transistor-transistor logic integrated circuit chip.
Claim 9
Dependent Claim
30 words
A system for blanking transmission of a radar system having an analog synchro voltage as recited in claim 1 wherein said means for switching comprises an AH0151CD integrated circuit chip.
Claim 10
Dependent Claim
256 words
A radar system comprising: a radar transmitter having a sector-blanking system, said sector blanking system comprising a portable housing, means, connected to said portable housing, for converting the analog synchro voltage into binary-coded decimal information, first means, electrically connected in series to said means for converting and positioned within said portable housing, for comparing the binary-coded decimal information to a predetermined rotational positioning of a radar antenna, second means, electrically connected in series to said means for converting and in parallel to said first means for comparing, for comparing the binary-coded decimal information to a second predetermined rotational positioning of the radar antenna, means, electrically connected in series to said first and second means for comparing, for latching outputs of said first and second means for comparing, and means, electrically connected to said means for latching and to the radar system, for switching off and on the transmission of the radar system; a duplexer, electrically connected to said radar transmitter; an antenna, electrically connected to said duplexer, for transmitting pulses of high frequency energy and detecting energy reflections; means, connected to said antenna, for rotating said antenna about a horizontal axis; means, electrically connected to said duplexer, for receiving the detected energy reflections from said antenna; means, electrically connected to said means for receiving, for displaying a video output of the received energy signal; and a synchro, electrically connected to said antenna, said means for rotating, and said means for displaying, for coordinating the sweep of said means for displaying with the sweep of said antenna.
Claim 11
Dependent Claim
256 words
A radar system comprising: a radar transmitter having a sector-blanking system, said sector blanking system comprising a portable housing, means, connected to said portable housing, for converting the analog synchro voltage into binary-coded decimal information, first means, electrically connected in series to said means for converting and positioned within said portable housing, for comparing the binary-coded decimal information to a predetermined rotational positioning of a radar antenna, second means, electrically connected in series to said means for converting and in parallel to said first means for comparing, for comparing the binary-coded decimal information to a second predetermined rotational positioning of the radar antenna, means, electrically connected in series to said first and second means for comparing, for latching outputs of said first and second means for comparing, and means, electrically connected to said means for latching and to the radar system, for switching off and on the transmission of the radar system; a duplexer, electrically connected to said radar transmitter; an antenna, electrically connected to said duplexer, for transmitting pulses of high frequency energy and detecting energy reflections; means, connected to said antenna, for rotating said antenna about a horizontal axis; means, electrically connected to said duplexer, for receiving the detected energy reflections from said antenna; means, electrically connected to said means for receiving, for displaying a video output of the received energy signal; and a synchro, electrically connected to said antenna, said means for rotating, and said means for displaying, for coordinating the sweep of said means for displaying with the sweep of said antenna.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-14 | 1997-09-13 | 1998-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-14 | 2001-09-13 | 2002-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-14 | 2005-09-13 | 2006-03-15 | $7700.00 | Window Closed / Lapsed |