Radar sector blanker
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorRoger B. Hall
Life of this patent
Estimating the term…
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.
Claims9
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.
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.
Dependencies are inferred from the claim text.