2D-MIMO RADAR ANTENNA ARRAY GEOMETRY AND DESIGN METHOD
First Claim
1. A multiple input multiple output (MIMO) antenna for a radar system, the antenna comprising:
- a plurality of transmitter antennas forming a planar transmitter antenna array, wherein the plurality of transmitter antennas are configured to emit orthogonal waveforms; and
a plurality of receiver antennas forming at least two receiver antenna arrays;
wherein along a first axis an interelement spacing between the plurality of receiver antennas in each receiver antenna array is dense relative to an interelement spacing between the plurality of transmitter antennas; and
along a second axis the interelement spacing between the plurality of transmitter antennas is dense relative to the interelement spacing between the plurality of receiver antennas.
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Accused Products
Abstract
A multiple input multiple output (MIMO) antenna for a radar system includes a plurality of transmitter antennas forming a planar transmitter antenna array, wherein the plurality of transmitter antennas are configured to emit orthogonal waveforms, and a plurality of receiver antennas forming at least two receiver antenna arrays, wherein along a first axis an interelement spacing between the plurality of receiver antennas in each receiver antenna array is dense relative to an interelement spacing between the plurality of transmitter antennas; and along a second axis the interelement spacing between the plurality of transmitter antennas is dense relative to the interelement spacing between the plurality of receiver antennas.
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Citations
20 Claims
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1. A multiple input multiple output (MIMO) antenna for a radar system, the antenna comprising:
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a plurality of transmitter antennas forming a planar transmitter antenna array, wherein the plurality of transmitter antennas are configured to emit orthogonal waveforms; and a plurality of receiver antennas forming at least two receiver antenna arrays; wherein along a first axis an interelement spacing between the plurality of receiver antennas in each receiver antenna array is dense relative to an interelement spacing between the plurality of transmitter antennas; and
along a second axis the interelement spacing between the plurality of transmitter antennas is dense relative to the interelement spacing between the plurality of receiver antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A multiple input multiple output (MIMO) antenna for a radar system, the antenna comprising:
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a planar transmitter antenna array having a first portion and a second portion, wherein the first portion includes a first plurality of transmitter antennas forming a plurality of equidistant rows extending along a first axis and a plurality of equidistant columns extending along a second axis, and wherein the second portion includes a second plurality of transmitter antennas forming a row extending along the first axis, wherein the first portion is separated from the second portion along the second axis by an offset relative to a spacing of the equidistant rows in the first portion; and a plurality of receiver antennas forming at least two receiver antenna arrays, wherein an interelement spacing between the plurality of receiver antennas in each receiver antenna array is uniform along the first axis, and wherein the at least two receiver antenna arrays are separated along the second axis by a distance proportional to a number of rows in the first portion and the spacing of the equidistant rows in the first portion. - View Dependent Claims (17, 18)
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19. A method for determining an angle of arrival of an incident plane wave using a multiple input multiple output (MIMO) antenna array configured to produce a virtual array having multiple overlapping virtual antenna elements, the method comprising the steps of:
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receiving a plurality of incident signals reflected from one or more objects; obtaining magnitudes from the plurality of incident signals for at least two of the overlapping virtual antenna elements at a select elevation; calculating a phase for incident signals received from the at least two overlapping virtual antenna elements, wherein the phase is based on an expected phase difference associated with the overlapping virtual antenna elements; and determining the angle of arrival by applying a resolving function to compare the expected phase difference between the signals from two of the overlapping virtual antenna elements. - View Dependent Claims (20)
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Specification