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US 12,270,893 B2Granted
Calibrating radars and tracking space objects
AssigneeLeoLabs, Inc.
InventorsMichael Nicolls, John Buonocore, Christopher Rosner, Matthew Adelman, Matthew Stevenson
Life of this patent
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Abstract
Some of such technologies enable a technique for calibrating a radar based on using—A—an elemental antenna, which can be embedded on a housing hosting a set of antenna elements, or—B—an antenna mounted to a reflector (108). Some of such technologies enable a radar site containing a first ID phased array (112) and a second ID phased array (112), where the first ID phased array sends a set of signals and receives a set of reflections based on the set of signals, and the second ID phased array receives the set of reflections.
Claims10
A radar calibration method comprising:
- transmitting a signal from each of a plurality of phased array antennas and measuring a transmission phase for each transmitted signal as it is received at one or more calibration antennas, wherein one transmission phase is measured for each phased array antenna-calibration antenna combination;
- receiving, from each of the one or more calibration antennas, a signal at each of the plurality of phased array antennas, and measuring a receive phase for each received signal at each of the plurality of phased array antennas, wherein one receive phase is measured for each phased array antenna-calibration antenna combination;
- adjusting each measured transmission phase and each measured receive phase by a phase offset associated with a corresponding one of the one or more calibration antennas, where the phase offset associated with each one of the one or more calibration antennas is greater than or equal to zero;
- calculating a single transmission phase correction for each of the plurality of phased array antennas, wherein the single transmission phase correction for a given one of the phased array antennas is based on a weighted average of the offset adjusted, measured transmission phases associated with the given one of the phased array antennas and the one or more calibration antennas;
- calculating a single receive phase correction for each of the plurality of phased array antennas, wherein the single receive phase correction for a given one of the phased array antennas is based on a weighted average of the offset adjusted, measured receive phases associated with the given one of the phased array antennas and the one or more calibration antennas;
- and
- storing the single transmission phase correction for each of the plurality of phased array antennas and the single receive phase correction for each of the plurality of phased array antennas for adjusting the phase of the plurality of phased array antennas during radar operations.
4 more elements
Dependencies are inferred from the claim text.