Radar system for obstacle avoidance
First Claim
1. A radar system comprising:
- a transmitter antenna configured to transmit a radio frequency (RF) signal;
a first receiver antenna coupled to a first receiver;
a second receiver antenna coupled to a second receiver;
each of the first and second receiver antennas configured to receive a reflection of the RF signal, wherein the first and second receiver antennas are synchronized and separated by a vertical distance; and
radar processing circuitry coupled to the first receiver antenna and the second receiver antenna via the first receiver and the second receiver, respectively, the radar processing circuitry configured to control transmission of the RF signal from the transmitter antenna and to determine an elevation of an object reflecting the RF signal based on the vertical distance separating the first receiver antenna from the second receiver antenna and on a phase difference between the reflected RF signal received by the first receiver antenna and the reflected RF signal received by the second receiver antenna;
wherein the transmit antenna, first receiver antenna, and second receiver antenna are operable to continuously rotate up to 360 degrees along an azimuth angle without rotating along an elevation angle.
1 Assignment
0 Petitions
Accused Products
Abstract
A radar system comprises a transmitter antenna configured to transmit a radio frequency (RF) signal, a first receiver antenna, and a second receiver antenna. Each of the first and second receiver antennas are configured to receive a reflection of the RF signal, wherein the first and second receiver antennas are synchronized and separated by a vertical distance. The radar system also comprises radar processing circuitry configured to control transmission of the RF signal from the transmitter antenna and to determine an elevation of an object reflecting the RF signal based on the phase difference between the reflected RF signal received by the first receiver antenna and the reflected RF signal received by the second receiver antenna; wherein the transmit antenna, first receiver antenna, and second receiver antenna are operable to continuously rotate 360 degrees along an azimuth angle without rotating along an elevation angle.
72 Citations
20 Claims
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1. A radar system comprising:
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a transmitter antenna configured to transmit a radio frequency (RF) signal; a first receiver antenna coupled to a first receiver; a second receiver antenna coupled to a second receiver;
each of the first and second receiver antennas configured to receive a reflection of the RF signal, wherein the first and second receiver antennas are synchronized and separated by a vertical distance; andradar processing circuitry coupled to the first receiver antenna and the second receiver antenna via the first receiver and the second receiver, respectively, the radar processing circuitry configured to control transmission of the RF signal from the transmitter antenna and to determine an elevation of an object reflecting the RF signal based on the vertical distance separating the first receiver antenna from the second receiver antenna and on a phase difference between the reflected RF signal received by the first receiver antenna and the reflected RF signal received by the second receiver antenna; wherein the transmit antenna, first receiver antenna, and second receiver antenna are operable to continuously rotate up to 360 degrees along an azimuth angle without rotating along an elevation angle. - View Dependent Claims (2, 3, 4, 5, 6, 19)
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7. An unmanned vehicle system comprising:
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an unmanned vehicle, wherein the unmanned vehicle comprises; at least one actuator operable to adjust motion of an unmanned vehicle; a radar system operable to detect the presence of objects near the unmanned vehicle; and a navigation system coupled to the at least one actuator and the radar system, wherein the navigation system is operable to provide control signals to the at least one actuator to adjust the motion of the unmanned vehicle; wherein the radar system comprises; a transmitter antenna operable to transmit a radio frequency (RF) signal; a first receiver antenna coupled to a first receiver; a second receiver antenna coupled to a second receiver, each of the first and second receiver antennas operable to receive a reflection of the RF signal, wherein the first and second receiver antennas are synchronized and separated by a vertical distance; and radar processing circuitry coupled to the first receiver antenna and the second receiver antenna via the first receiver and the second receiver, respectively, the radar processing circuitry configured to control transmission of the RF signal from the transmitter and to determine the elevation of an object reflecting the RF signal based on the vertical distance separating the first receiver antenna from the second receiver antenna and on a phase difference between the reflected RF signal received by the first receiver antenna and the reflected RF signal received by the second receiver antenna; wherein the transmitter antenna, first receiver antenna, and second receiver antenna are operable to continuously rotate up to 360 degrees along an azimuth angle without rotating along an elevation angle. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 20)
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15. A method of detecting obstacles with a radar system, the method comprising:
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continuously rotating a transmitter antenna 360 degrees along an azimuth angle without rotating the transmitter antenna along an elevation angle, the transmitter configured to transmit a radio frequency (RF) signal; continuously rotating two receiver antennas 360 degrees along the azimuth angle without rotating the two receiver antennas along the elevation angle, each receiver configured to receive a reflection of the transmitted RF signal, wherein the two receiver antennas are separated by a vertical distance; measuring the phase difference between a reflected signal received by one of the two receivers and a reflected signal received substantially simultaneously by the other receiver; and determining the elevation angle of an object which reflected the RF signals based on the measured phase difference. - View Dependent Claims (16, 17, 18)
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Specification