Phased array automotive radar

1. A system comprising:

a first phased array radar assembly configured to be attached to a vehicle, wherein the first phased array radar assembly comprises:

a first plurality of antennas arranged in an array and attached to a first circuit board;

one or more circuits attached to the first circuit board, wherein each of the one or more circuits comprises:

transmitter circuitry communicatively coupled to a subset of the first plurality of antennas; and

receiver circuitry communicatively coupled to the subset of the first plurality of antennas;

the one or more circuits being operable to:

transmit a signal via at least one of the first plurality of antennas;

receive a reflection of the signal via at least one of the first plurality of antennas; and

generate a representation of a scene based on the reflection of the signal.

2. The system of claim 1 , wherein:

the one or more circuits comprise a first circuit and a second circuit; and

the first circuit is communicatively coupled to the second circuit via one or more traces of the first circuit board.

3. The system of claim 2 , wherein:

the first circuit is communicatively coupled to the subset of the first plurality of antennas; and

the second circuit is communicatively coupled to a second subset of the first plurality of antennas.

4. The system of claim 3 , wherein:

the first circuit is operable to:

transmit the signal via the subset of the first plurality of antennas using a first one or more beamforming coefficients;

receive reflections of the signal via the subset of the first plurality of antennas using the first one or more beamforming coefficients; and

generate a first representation of the scene based on the reflections of the signal; and

the second circuit is operable to:

transmit the signal via the second subset of the first plurality of antennas using a second one or more beamforming coefficients;

receive reflections of the signal via the second subset of the first plurality of antennas using the second one or more beamforming coefficients; and

generate a second representation of the scene based on the reflections of the signal.

5. The system of claim 4 , wherein:

the first circuit is operable to send the first representation of the scene to the second circuit; and

the second circuit is operable to combine the first representation of the scene and the second scene representation of the scene to generate an aggregate representation of the scene.

6. The system of claim 1 , wherein the first plurality of antennas are formed from a single-piece substrate.

7. The system of claim 6 , wherein each of the first plurality of antennas is a horn antenna.

8. The system of claim 6 , wherein the single-piece substrate is a non-conductive material plated with a conductive material.

9. The system of claim 8 , wherein each of the first plurality of antennas is a horn antenna.

10. The system of claim 6 , wherein the single-piece substrate is polycarbonate.

11. The system of claim 1 , wherein the array is a two-dimensional array.

12. The system of claim 11 , wherein the one or more circuits comprise beamforming circuitry operable to steer a transmit radiation pattern and/or receive radiation pattern in two dimensions.

13. The system of claim 1 , wherein the first phased array radar assembly is attached on or behind a bumper of the vehicle such that the first phased array radar assembly is positioned to transmit signals in a direction of travel of the vehicle and receive reflections of the signals.

14. The system of claim 13 , comprising a second phased array radar assembly configured to be attached to an vehicle, wherein the second phased array radar assembly comprises:

a second plurality of antennas arranged in an array and attached to a second circuit board;

one or more circuits attached to the second circuit board, wherein each of the one or more circuits attached to the second circuit board comprises:

transmitter circuitry communicatively coupled to a subset of the second plurality of antennas; and

receiver circuitry communicatively coupled to the subset of the second plurality of antennas.

15. The system of claim 14 , the first phased array radar assembly and the second phased array radar assembly are operable to communicate wirelessly via the first plurality of antennas and the second plurality of antennas.

16. The system of claim 14 , wherein first phased array radar assembly and the second phased array radar assembly are attached to the vehicle in different locations.

17. The system of claim 16 , wherein the first phased array radar assembly and second phased array radar assembly are attached to the vehicle such that they are pointed in different directions.

18. The system of claim 1 , wherein:

the transmitter circuitry is operable to transmit a signal comprising one or more orthogonal frequency division multiplexed (OFDM) frames; and

the receiver circuitry is operable to receive and process reflections of the signal comprising the one or more OFDM frames to detect objects off of which the signal reflected.

19. The system of claim 1 , wherein the first plurality of antennas are attached to a first side of the first circuit board and the one or more circuits are attached to a second side of the first circuit board that is opposite the first side.

20. The system of claim 1 , the first phased array radar assembly being operable to communicate wirelessly via the first plurality of antennas.

21. A system comprising:

a first phased array radar assembly configured to be attached to a vehicle, wherein the first phased array radar assembly comprises:

a first plurality of antennas arranged in an array and attached to a first circuit board;

one or more circuits attached to the first circuit board, wherein each of the one or more circuits comprises:

transmitter circuitry communicatively coupled to a subset of the first plurality of antennas; and

receiver circuitry communicatively coupled to the subset of the first plurality of antennas;

a second phased array radar assembly comprising a second plurality of antennas operable to communicate wirelessly with the first plurality of antennas of the first phased array radar assembly.