Multiple input multiple output imaging array and corresponding imaging method

Patent metadata

Field	Value
Publication number	US-11442158-B2
Application number	US-201916529367-A
Country	US
Kind code	B2
Filing date	Aug 1, 2019
Priority date	Aug 1, 2019
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

A multiple input multiple output imaging array for incident angle resolved images with respect to a device under test is provided. The multiple input multiple output imaging array comprises a redundant array of transmit and receive antennas and a controller. In this context, the controller is configured to implement a selection scheme, wherein the selection scheme selects the respective transmit and receive antenna pairs used to create the corresponding image.

First claim

What is claimed is:

1. A multiple input multiple output millimeter wave imaging array for incident angle dependent millimeter wave images with respect to a device, the multiple input multiple output millimeter wave imaging array comprising:
a redundant array of transmit and receive millimeter wave antennas, and
a controller,
wherein the controller is configured to implement a selection scheme, wherein the selection scheme selects respective transmit and receive millimeter wave antenna pairs for creating a corresponding millimeter wave image,
wherein the redundant array is redundant with respect to one dimension, and
wherein the device and/or the redundant array is mechanically moved to create a synthetic two-dimensional redundant array over time.

2. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the selection scheme is based on the desired incident angle which will be used to create the corresponding image.

3. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the transmit and receive millimeter wave antennas are disposed such that the transmit and receive millimeter wave antennas are approximately at the incident angle from one another from a respective specular point.

4. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein a collection of the respective transmit and receive millimeter wave antenna pairs forms an array creating a distortion and/or alias minimized image.

5. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the controller is configured to reconstruct the corresponding image based on a densely sampled array.

6. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein on the basis of a collection of the respective transmit and receive millimeter wave antenna pairs forming an array creating a distortion and/or alias minimized image, the controller is configured to reconstruct the corresponding image based on a corresponding sampled array.

7. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the redundant array is redundant with respect to at least one dimension.

8. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the device comprises a radome.

9. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the redundant array comprises at least one gap.

10. The multiple input multiple output millimeter wave imaging array according to claim 9 , wherein the controller is configured to resolve the at least one gap.

11. The multiple input multiple output millimeter wave imaging array according to claim 9 , wherein the controller is configured to resolve the at least one gap by averaging between nearby incident angles.

12. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the controller is configured to create exact incident angles through interpolations between nearby incident angles.

13. The multiple input multiple output millimeter wave imaging array according to claim 1 , wherein the controller is configured to average between nearby incident angles.

14. A multiple input multiple output millimeter wave imaging method for incident angle dependent millimeter wave images with respect to a device, the multiple input multiple output millimeter wave imaging method comprising the steps of:
providing a redundant array of transmit and receive millimeter wave antennas, and
implementing a selection scheme,
wherein the selection scheme selects respective transmit and receive millimeter wave antenna pairs for creating a corresponding millimeter wave image, and
wherein the method further comprises the step of forming an array creating a distortion and/or alias minimized image with the aid of a collection of the respective transmit and receive millimeter wave antenna pairs.

15. The multiple input multiple output millimeter wave imaging method according to claim 14 , wherein the selection scheme is based on the desired incident angle which will be used to create the corresponding image.

16. The multiple input multiple output millimeter wave imaging method according to claim 14 , wherein the method further comprises the step of disposing the transmit and receive millimeter wave antennas such that the transmit and receive millimeter wave antennas are approximately at the incident angle from one another from a respective specular point.

17. The multiple input multiple output millimeter wave imaging method according to claim 14 , wherein the method further comprises the step of reconstructing the corresponding image based on a sampled array.

18. A multiple input multiple output millimeter wave imaging array for incident angle dependent millimeter wave images with respect to a device, the multiple input multiple output millimeter wave imaging array comprising:
a redundant array of transmit and receive millimeter wave antennas, and
a controller,
wherein the controller is configured to implement a selection scheme,
wherein the selection scheme selects respective transmit and receive millimeter wave antenna pairs for creating a corresponding millimeter wave image, and
wherein the controller is configured to create exact incident angles through interpolations between nearby incident angles.

Assignees

• Rohde & Schwarz

Inventors

• Koeppel Tobias
• Gumbmann Frank
• Simper Benedikt
• Schiessl Andreas

Classifications

• G01S13/4418 Primary

  with means for eliminating radar-dependent errors in angle measurements, e.g. multipath effects · CPC title

• G01S13/89

  for mapping or imaging · CPC title

• H01Q3/02

  using mechanical movement of antenna or antenna system as a whole · CPC title

• G01S7/285

  Receivers · CPC title

• G01S7/02 Primary

  of systems according to group G01S13/00 · CPC title