PCB integrated waveguide terminations and load

Patent metadata

Field	Value
Publication number	US-10033082-B1
Application number	US-201514818769-A
Country	US
Kind code	B1
Filing date	Aug 5, 2015
Priority date	Aug 5, 2015
Publication date	Jul 24, 2018
Grant date	Jul 24, 2018

Abstract

The present application discloses embodiments that relate to a radar system. The embodiments may include a plurality of radiating waveguides each having a waveguide input. The embodiments also include an attenuation component, which can be located on a circuit board. The embodiments further include a beamforming network. The beamforming network includes a beamforming network input. The beamforming network also includes a plurality of beamforming network outputs, where each beamforming network output is coupled to one of the waveguide inputs. Additionally, the beamforming network includes an attenuation port, wherein the attenuation port is configured to couple the beamforming network to the attenuation component. The attenuation component dissipates received electromagnetic energy.

First claim

What is claimed is:

1. A radar system comprising:
a plurality of radiating waveguides each having a waveguide input, wherein the radiating waveguides are aligned on a plane defined by a center of a width of the radiating waveguide and a length of the radiating waveguide, and wherein each radiating waveguide comprises at least one radiating element;
at least one attenuation component, wherein the at least one attenuation component is disposed on a circuit board and wherein the attenuation component is configured to dissipate electromagnetic energy; and
a beamforming network, wherein the beamforming network is aligned on the plane defined by the center of the width of the radiating waveguide and the length of the radiating waveguide, and wherein the beamforming network comprises:
a beamforming network input,
a plurality of beamforming network outputs, wherein each beamforming network output is coupled to one of the waveguide inputs, and
at least one attenuation port, wherein the at least one attenuation port is configured to couple the beamforming network to the at least one attenuation component.

2. The radar system according to claim 1 , wherein the at least one attenuation port comprises a plurality of attenuation ports and wherein the at least one attenuation component comprises a plurality of attenuation components, wherein each attenuation port is coupled to a respective attenuation component.

3. The radar system according to claim 1 , wherein the attenuation component comprises a patch on the circuit board.

4. The radar system according to claim 3 , wherein the patch comprises a surface configured to absorb electromagnetic energy.

5. The radar system according to claim 1 , wherein the attenuation port is perpendicular to the plane of the waveguides.

6. The radar system according to claim 1 , wherein the attenuation component comprises at least one microstrip line on the circuit board.

7. The radar system according to claim 1 , wherein the attenuation component comprises conductive ink printed on the circuit board.

8. A method comprising:
receiving electromagnetic energy by a waveguide, wherein the waveguide is aligned on a plane defined by a center of a width of the waveguide and a length of the waveguide;
radiating at least a portion of the electromagnetic energy by radiating components of the waveguide, wherein a portion of the electromagnetic energy that is not radiated is reflected as reflected electromagnetic energy;
coupling at least a portion of the reflected electromagnetic energy to an attenuation port, wherein the attenuation port is aligned perpendicular to the plane;
coupling at least a portion of the reflected electromagnetic energy to an attenuation component, wherein the attenuation component is disposed on a circuit board; and
dissipating the portion of the reflected electromagnetic energy coupled to the attenuation component by the attenuation component.

9. The method according to claim 8 , wherein the waveguide comprises a plurality of attenuation ports, wherein each attenuation port is coupled to a respective attenuation component in a plurality of attenuation components.

10. The method according to claim 8 , wherein the attenuation component comprises a patch on the circuit board, wherein the method further comprises coupling the portion of the reflected electromagnetic energy by the patch.

11. The method according to claim 8 , further comprising absorbing the portion of the reflected electromagnetic energy by a surface of the patch.

12. The method according to claim 8 , wherein the attenuation component comprises at least one microstrip line on the circuit board.

13. The method according to claim 8 , wherein the attenuation component comprises conductive ink printed on the circuit board.

14. A waveguide system comprising:
a waveguide feed configured to receive electromagnetic energy;
a beamforming network coupled to the waveguide feed, wherein the beamforming network:
is aligned on a plane defined by a center of a width of the beamforming network and a length of the beamforming network,
has a plurality of elongated segments, and
is configured to divide the electromagnetic energy into a plurality of portions of electromagnetic energy; and

a plurality of radiating waveguides located in the plane, wherein each radiating waveguide comprises at least one radiating element, wherein each radiating waveguide receives one of the portions of electromagnetic energy and wherein the radiating element is configured to:
radiate at least a portion of the received portion of electromagnetic energy, and
reflect the portion of the received portion of electromagnetic energy that is not radiated;

a respective attenuation port coupled to each of the elongated segments and configured to couple the reflected portion of the received portion of electromagnetic energy; and
a respective attenuation component coupled to each attenuation port and configured to attenuate the reflected portion of the received portion of electromagnetic energy, wherein the attenuation component is disposed on a circuit board.

15. The waveguide system according to claim 14 , wherein the beamforming network is configured to divide the electromagnetic energy based on a taper profile.

16. The waveguide system according to claim 14 , wherein the attenuation component comprises a patch on the circuit board.

17. The waveguide system according to claim 16 , wherein the patch comprises a surface configured to absorb electromagnetic energy.

18. The waveguide system according to claim 14 , wherein the attenuation port is perpendicular to the plane of the waveguides.

19. The waveguide system according to claim 14 , wherein the attenuation component comprises at least one microstrip line on the circuit board.

20. The waveguide system according to claim 14 , wherein the attenuation component comprises conductive ink printed on the circuit board.

Assignees

• Waymo Llc

Inventors

• Izadian Jamal
• Brown Adam

Classifications

• H01P5/107

  Hollow-waveguide/strip-line transitions · CPC title

• H01Q3/40

  with phasing matrix · CPC title

• G01S13/931

  of land vehicles · CPC title

• H01Q21/08

  the units being spaced along or adjacent to a rectilinear path {(waveguide fed H01Q21/0037)} · CPC title

• H01Q21/062

  using dipole aerials; (H01Q21/067, H01Q21/068 take precedence) · CPC title