Innovative Open Waveguide Bend for Leakage Mitigation

Patent metadata

Field	Value
Publication number	US-2026036670-A1
Application number	US-202418640614-A
Country	US
Kind code	A1
Filing date	Apr 19, 2024
Priority date	Apr 19, 2024
Publication date	Feb 5, 2026
Grant date	—

Abstract

A radar control module includes a printed circuit board including a radio frequency port. A trough waveguide antenna is mounted to the printed circuit board and includes a base and a first sidewall and a second sidewall each extending from the base. A fin extends from the base along a center region between the first sidewall and the second sidewall and an open side opposite the base. A first channel is disposed between the first sidewall and the fin and a second channel is formed between the second sidewall and the fin. The trough waveguide antenna includes a bend region in which the first channel is on an interior of the bend region and the second channel is on an exterior of the bend region and a depth of the first channel is deeper in the bend region than a depth of the second channel in the bend region.

First claim

What is claimed is:

1 . A radar control module, comprising:
a printed circuit board including a radio frequency port; a trough waveguide antenna mounted to the printed circuit board and having a base and a pair of sidewalls extending from the base, a fin extending from the base along a center region between the pair of sidewalls and an open side opposite the base, wherein the trough waveguide antenna has a bend region in which a depth of the trough waveguide antenna is deeper on an interior of the fin in the bend region than a depth of the trough waveguide antenna on an exterior of the fin in the bend region.

2 . The radar control module according to claim 1 , wherein the printed circuit board includes a monolithic microwave integrated circuit (MMIC) for providing radio frequency signals to the radio frequency port.

3 . The radar control module according to claim 1 , further comprising a transition path from the radio frequency port to an end of the trough waveguide antenna.

4 . The radar control module according to claim 1 , wherein the depth of the trough on the interior of the fin includes a transition region which gradually increases in depth at an end entering into the bend region.

5 . The radar control module according to claim 1 , wherein the depth of the trough on the interior of the fin includes a transition region which gradually decreases in depth at an end exiting the bend region.

6 . The radar control module according to claim 1 , wherein the bend region includes a radiused 90 degree bend.

7 . The radar control module according to claim 1 , wherein the depth of the trough waveguide antenna on the exterior of the fin has a constant depth along a length of the trough waveguide antenna.

8 . A radar control module, comprising:
a printed circuit board including a radio frequency port; a trough waveguide antenna mounted to the printed circuit board and having a base and a first sidewall and a second sidewall each extending from the base, a fin extending from the base along a center region between the first sidewall and the second sidewall and an open side opposite the base, a first channel is disposed between the first sidewall and the fin and a second channel is formed between the second sidewall and the fin, wherein the trough waveguide antenna includes a bend region in which the first channel is on an interior of the bend region and the second channel is on an exterior of the bend region and a depth of the first channel is deeper in the bend region than a depth of the second channel in the bend region.

9 . The radar control module according to claim 8 , wherein the printed circuit board includes a monolithic microwave integrated circuit (MMIC) for providing radio frequency signals to the radio frequency port.

10 . The radar control module according to claim 8 , further comprising a transition path from the radio frequency port to an end of the trough waveguide antenna.

11 . The radar control module according to claim 8 , wherein the depth of the first channel includes a transition region which gradually increases in depth at an end entering into the bend region.

12 . The radar control module according to claim 8 , wherein the depth of the first channel includes a transition region which gradually decreases in depth at an end exiting the bend region.

13 . The radar control module according to claim 8 , wherein the bend region includes a radiused 90 degree bend.

14 . The radar control module according to claim 8 , wherein the depth of the second channel has a constant depth along a length of the trough waveguide antenna.

15 . A radar control module, comprising:
a printed circuit board including a radio frequency port; a trough waveguide antenna mounted to the printed circuit board and having a base and a first sidewall and a second sidewall each extending from the base, a fin extending from the base along a center region between the first sidewall and the second sidewall and an open side opposite the base, a first channel is disposed between the first sidewall and the fin and a second channel is formed between the second sidewall and the fin, wherein the trough waveguide antenna includes a bend region in which the first channel is on an interior of the bend region and the second channel is on an exterior of the bend region and a depth of the first channel is deeper in the bend region than a depth of the second channel in the bend region and the depth of the second channel has a constant depth along a length of the trough waveguide antenna.

16 . The radar control module according to claim 15 , wherein the printed circuit board includes a monolithic microwave integrated circuit (MMIC) for providing radio frequency signals to the radio frequency port.

17 . The radar control module according to claim 15 , further comprising a transition path from the radio frequency port to an end of the trough waveguide antenna.

18 . The radar control module according to claim 15 , wherein the depth of the first channel includes a transition region which gradually increases in depth at an end entering into the bend region.

19 . The radar control module according to claim 15 , wherein the depth of the first channel includes a transition region which gradually decreases in depth at an end exiting the bend region.

20 . The radar control module according to claim 15 , wherein the bend region includes a radiused 90 degree bend.

Assignees

• Aptiv Technologies AG

Inventors

• Shi Shawn
• Rao Qinjiang

Classifications

• H05K2201/10098

  Components for radio transmission, e.g. radio frequency identification [RFID] tag, printed or non-printed antennas · CPC title

• H05K1/0243

  Printed circuits associated with mounted high frequency components · CPC title

• H01P5/022

  Transitions between lines of the same kind and shape, but with different dimensions · CPC title

• H01P1/022

  in waveguides of polygonal cross-section (H01P1/065 takes precedence) · CPC title

• G01S7/03 Primary

  Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver · CPC title