Guard band antenna in a beam steering radar for resolution refinement

Patent metadata

Field	Value
Publication number	US-2022252721-A1
Application number	US-202017614196-A
Country	US
Kind code	A1
Filing date	Jun 2, 2020
Priority date	Jun 3, 2019
Publication date	Aug 11, 2022
Grant date	—

Abstract

Examples disclosed herein relate to a beam steering vehicle radar for object identification. The beam steering vehicle radar includes a beam steering receive antenna having a plurality of antenna elements to generate a radiation beam comprising a main lobe and a plurality of side lobes, at least one guard band antenna to generate a guard band radiation beam, and a perception module coupled to the beam steering receive antenna to detect and identify a first object reflection in the radiation beam. The perception module has a monopulse module to determine a range and angle of arrival for the first object reflection and detect multiple objects upon determining an absence of a second object reflection in the guard band radiation beam.

First claim

What is claimed is:

1 . A beam steering vehicle radar for object identification, comprising:
a beam steering receive antenna having a plurality of antenna elements to generate a radiation beam comprising a main lobe and a plurality of side lobes; at least one guard band antenna to generate a guard band radiation beam; and a perception module coupled to the beam steering receive antenna to detect and identify a first object reflection in the radiation beam,
wherein the perception module comprises a monopulse module to determine a range and angle of arrival for the first object reflection and detect multiple objects upon determining an absence of a second object reflection in the guard band radiation beam.

2 . The beam steering vehicle radar of claim 1 , wherein the beam steering receive antenna comprises a meta-structure antenna.

3 . The beam steering vehicle radar of claim 1 , wherein the beam steering receive antenna comprises a phased array antenna.

4 . The beam steering vehicle radar of claim 1 , wherein the beam steering receive antenna is controlled by the perception module.

5 . The beam steering vehicle radar of claim 1 , wherein the perception module comprises at least one neural network to identify the multiple objects.

6 . The beam steering vehicle radar of claim 1 , wherein the monopulse module is to reduce a scan step size of a main lobe to detect the multiple objects.

7 . The beam steering vehicle radar of claim 1 , wherein the monopulse module is to reduce a scan step size of the guard band radiation beam to detect the multiple objects.

8 . A method for identifying an object with a beam steering radar, comprising:
receiving a first object reflection in a main lobe from a receive antenna in the beam steering radar; generating a guard band radiation beam from at least one guard band antenna; determining a range and angle of arrival for the first object reflection; capturing object data for the first object reflection upon determining a second object reflection in the guard band radiation beam at the angle of arrival; and initiating a refined scan to identify multiple objects upon determining an absence of other object reflections in the guard band radiation beam.

9 . The method of claim 8 , wherein receiving a first object reflection comprises receiving a millimeter wave RF signal at the receive antenna.

10 . The method of claim 8 , wherein determining a range and angle of arrival for the first object reflection comprises generating a range doppler map.

11 . The method of claim 10 , wherein capturing object data for the first object reflection comprises identifying the first object reflection in the range doppler map using at least one neural network.

12 . The method of claim 8 , wherein initiating a refined scan comprises reducing a scan step size of the main lobe to detect the multiple objects.

13 . The method of claim 8 , wherein initiating a refined scan comprises reducing a scan step size of the guard band radiation beam to detect the multiple objects.

14 . A receive antenna system coupled to a processing engine in a beam steering radar, comprising:
a beam steering receive antenna having a plurality of antenna elements to receive a millimeter wave RF signal and generate a radiation beam comprising a main lobe and a plurality of side lobes; and at least one guard band antenna to generate a guard band radiation beam from the millimeter wave RF signal,
wherein the processing engine is configured to detect multiple objects upon determining a first object reflection in the main lobe and an absence of a second object reflection in the guard band radiation beam.

15 . The receive antenna system of claim 14 , wherein the beam steering receive antenna comprises a meta-structure antenna.

16 . The receive antenna system of claim 14 , wherein the processing engine comprises a perception module to control scan parameters of the beam steering receive antenna.

17 . The receive antenna system of claim 16 , wherein the perception module comprises at least one neural network to identify the multiple objects.

18 . The receive antenna system of claim 14 , wherein the processing engine is to reduce a scan step size of a main lobe to detect the multiple objects.

19 . The receive antenna system of claim 14 , wherein the processing engine is to reduce a scan step size of the guard band radiation beam to detect the multiple objects.

20 . The receive antenna system of claim 14 , wherein the beam steering receive antenna is coupled to a plurality of phase shifters to align received millimeter wave RF signals that arrive at different times at each of the plurality of antenna elements in the beam steering receive antenna.

Assignees

• Metawave Corp

Inventors

• Carroll Kenneth Ray
• Achour Maha

Classifications

• G01S7/4021

  of receivers · CPC title

• G01S7/35 Primary

  Details of non-pulse systems · CPC title

• G01S13/89

  for mapping or imaging · CPC title

• G01S2013/93271

  in the front of the vehicles · CPC title

• G01S2013/0245

  Radar with phased array antenna · CPC title