Two-way radar beam pattern steering
AssigneeProvizio Limited
InventorsDenver Humphrey, Peter Ludlow, Steven Christie
Life of this patent
Estimating the term…
Abstract
A method of sensing an environment, using a radar system includes applying a progressive phase shift between a plurality of antenna elements of the radar system, recording signal return levels of the two-way radiation pattern upon application of the progressive phase shift, wherein the progressive phase shift moves the main lobe to a position other than boresight, and increases a signal return level of at least one sidelobe, and at least one object is detected at a position off-boresight based on the increased signal return level of the at least one sidelobe.
Claims21
A method of sensing an environment, using a radar system, comprising:
- setting a two-way signal return level of a main lobe at boresight as a reference level;
- applying a progressive phase shift between a plurality of antenna elements of the radar system for moving the main lobe to a position other than the boresight for increasing a two-way signal return level of at least one sidelobe;
- recording signal return level of the two-way radiation pattern with respect to the reference level upon application of the progressive phase shift;
- and
- detecting at least one object at boresight or at a position off-boresight based on comparing the applied progressive phase shift and recorded signal return level with a look-up table that includes a set of phase shift conditions, wherein each phase-shift condition includes a progressive phase shift for applying between the plurality of antenna elements, and corresponding plurality of recorded signal return levels for detecting at least one object on or off boresight.
(canceled)
A radar system comprising:
- at least one transmitter that includes a plurality of transmit antenna elements and a plurality of variable phase-shifter components connected between the at least one transmitter and the plurality of transmit antenna elements;
- at least one receiver that includes a plurality of receive antenna elements and a plurality of variable phase-shifter components connected between the at least one receiver and the plurality of receive antenna elements;
- and
- a radar control system configured to:
- set a two-way signal return level of a main lobe at boresight as a reference level;
- apply a progressive phase shift between a plurality of antenna elements of the radar system for moving the main lobe to a position other than the boresight for increasing a two-way signal return level of at least one sidelobe;
- record signal return level of the two-way radiation pattern with respect to the reference level upon application of the progressive phase shift;
- and
- detect at least one object at boresight or at a position off-boresight based on comparing the applied progressive phase shift and recorded signal return level with a look-up table that includes a set of phase shift conditions,
- wherein each phase-shift condition includes a progressive phase shift for applying between the plurality of antenna elements, and corresponding plurality of recorded signal return levels for detecting at least one object on or off boresight.
Dependencies are inferred from the claim text.