Radar device and method for producing a radar device

1 . A radar device, comprising:

a plurality of transmit antennas including a first transmit antenna, a second transmit antenna, a third transmit antenna, and a fourth transmit antenna;

a plurality of receive antennas including a first receive antenna, a second receive antenna, a third receive antenna, and a fourth receive antenna;

at least one high-frequency (HF) radar chip configured to generate a high-frequency signal and transmit it via the plurality of transmit antennas; and

a substrate, wherein the plurality of transmit antennas and the plurality of receive antennas are arranged on a first side of the substrate, and wherein the at least one HF radar chip is arranged on a second side of the substrate;

wherein a first subset of antennas comprises the first transmit antenna, the second transmit antenna, and the third transmit antenna, each antenna of the first subset of antennas being aligned in a first direction and offset from each other antenna in the first subset of antennas in a second direction;

wherein a second subset of antennas comprises the first receive antenna, the second receive antenna, and the third receive antenna, each antenna of the second subset of antennas being aligned in the first direction and offset from each other antenna in the second subset of antennas in the second direction; and

wherein the first subset of antennas and the second subset of antennas are situated between the fourth transmit antenna and the fourth receive antenna in the second direction;

wherein the at least one HF radar chip is connected to the plurality of transmit antennas and the plurality of receive antennas via through-coupling to a feed network, wherein the feed network is arranged on the second side of the substrate;

wherein the at least one HF radar chip is a monolithic microwave integrated circuit (MMIC).

2 . The radar device as recited in claim 1 , wherein the plurality of transmit antennas and the plurality of receive antennas are in the form of microstrip antennas.

3 . The radar device as recited in claim 1 , wherein the plurality of transmit antennas and the plurality of receive antennas are in the form of substrate-integrated waveguide (SIW) antennas.

4 . The radar device as recited in claim 3 , wherein the SIW antennas include multilayer SIW waveguide structures.

5 . The radar device as recited in claim 1 , wherein the plurality of transmit antennas and the plurality of receive antennas are in the form of dielectric resonator antennas.

6 . The radar device as recited in claim 1 , wherein the plurality of transmit antennas and the plurality of receive antennas are in the form of waveguide antennas.

7 . The radar device as recited in claim 1 , wherein the at least one HF radar chip is configured to drive the plurality of transmit antennas using a time-division multiplexing method.

8 . The radar device as recited in claim 1 , wherein the at least one HF radar chip is configured to drive the plurality of transmit antennas using a Doppler-division multiple access method or a frequency-division multiplexing method or a code-division multiplexing method with random codes or an orthogonal frequency-division multiplexing method.

9 . A method for producing a radar device, comprising the following steps:

forming a plurality of transmit antennas and a plurality of receive antennas, the plurality of transmit antennas including a first transmit antenna, a second transmit antenna, a third transmit antenna, and a fourth transmit antenna, and the plurality of receive antennas including a first receive antenna, a second receive antenna, a third receive antenna, and a fourth receive antenna;

forming at least one high-frequency (HF) radar chip configured to generate a high-frequency signal and transmit it via the transmit antennas; and

forming a substrate, wherein the plurality of transmit antennas and the plurality of receive antennas are arranged on a first side of the substrate, and wherein the at least one HF radar chip is arranged on a second side of the substrate;

wherein a first subset of antennas comprises the first transmit antenna, the second transmit antenna, and the third transmit antenna, each antenna of the first subset of antennas being aligned in a first direction and offset from each other antenna in the first subset of antennas in a second direction;

wherein a second subset of antennas comprises the first receive antenna, the second receive antenna, and the third receive antenna, each antenna of the second subset of antennas being aligned in the first direction and offset from each other antenna in the second subset of antennas in the second direction; and

wherein the first subset of antennas and the second subset of antennas are situated between the fourth transmit antenna and the fourth receive antenna in the second direction;

wherein the at least one HF radar chip is connected to the plurality of transmit antennas and the plurality of receive antennas via through-coupling to a feed network, wherein the feed network is arranged on the second side of the substrate;

wherein the at least one HF radar chip is a monolithic microwave integrated circuit (MMIC).

10 . The radar device as recited in claim 1 , wherein the substrate further comprises a waveguide coupler arranged on the second side of the substrate, and wherein a feed line is formed in the waveguide coupler.

11 . The method for producing a radar device as recited in claim 9 , wherein the substrate further comprises a waveguide coupler arranged on the second side of the substrate, and wherein a feed line is formed in the waveguide coupler.

12 . The radar device as recited in claim 1 , wherein the fourth transmit antenna is offset from the first subset of antennas in the first direction by a first predetermined distance, and wherein the fourth receive antenna is offset from the second subset of antennas in the first direction by a second predetermined distance.