Granted Patent B2

US 12,627,020 · App. 18/320,137 · Granted May 12, 2026

Inventors: Syed An Nazmus Saqueb (Westfield, IN); Biswadeep Das Gupta (Noblesville, IN); Navid Razi (Wuppertal, DE)

Assignee: Aptiv Technologies AG

H01P1/2088H01P1/022H01P1/209

Abstract

Claims (49)

1 . A waveguide comprising:

a low-pass filter portion configured to allow low-frequency electromagnetic energy therethrough and reject high-frequency electromagnetic energy, the low-pass filter portion comprising:

an input port;

an output port; and

a cavity feature formed between the input port and the output port, the cavity feature having a greater depth than respective depths of the input port and the output port, the cavity feature comprising:

a top wall; and

a bottom wall, disposed opposite the top wall, that achieves the greater depth for the cavity feature, the bottom wall comprising at least one curved portion configured to allow the cavity feature to achieve the allowance of the low-frequency electromagnetic energy and the rejection of the high-frequency electromagnetic energy, wherein the at least one curved portion of the bottom wall comprises a curved surface extending from the input port or the output port to an inner bottom planar surface of the bottom wall, and wherein the curved surface is convex relative to the cavity feature.

2 . The waveguide of claim 1 , wherein a length of the cavity feature between the input port and the output port is less than two times an operating wavelength.

3 . The waveguide of claim 1 , wherein the greater depth of the cavity feature is approximately an operating wavelength.

4 . The waveguide of claim 1 , wherein the greater depth of the cavity feature is approximately half a length of the cavity feature.

5 . A system comprising:

the waveguide of claim 1 ; and

a processor configured to generate the low-frequency electromagnetic energy.

6 . The waveguide of claim 1 , wherein the bottom wall further comprises a flat portion that is parallel to at least a portion of the top wall, the flat portion providing the greater depth, wherein:

the curved surface extends from the input port to the inner bottom planar surface of the bottom wall;

the at least one curved portion of the bottom wall comprises another curved surface extending from the inner bottom planar surface of the bottom wall to the output port; and

the another curved surface is convex relative to the cavity feature.

7 . The waveguide of claim 6 , wherein the low-pass filter portion comprises a planar side wall extending from the bottom wall to the top wall.

8 . A waveguide comprising:

a low-pass filter portion configured to allow low-frequency electromagnetic energy therethrough and reject high-frequency electromagnetic energy, the low-pass filter portion comprising:

an input port;

an output port,

wherein the input port and the output port have different depths, and

a cavity feature formed between the input port and the output port, the cavity feature having a greater depth than respective depths of the input port and the output port, the cavity feature comprising:

a top wall; and

a bottom wall, disposed opposite the top wall, that achieves the greater depth for the cavity feature, the bottom wall comprising at least one curved portion configured to allow the cavity feature to achieve the allowance of the low-frequency electromagnetic energy and the rejection of the high-frequency electromagnetic energy.

9 . The waveguide of claim 8 , wherein the top wall comprises i) a planar surface extending from the input port to the output port, or ii) a jog feature between two parallel portions.

10 . The waveguide of claim 9 , wherein:

the top wall comprises the jog feature; and

the jog feature is halfway between the input port and the output port.

11 . A waveguide comprising:

a low-pass filter portion configured to allow low-frequency electromagnetic energy therethrough and reject high-frequency electromagnetic energy, the low-pass filter portion comprising:

an input port;

an output port; and

a cavity feature formed between the input port and the output port, the cavity feature having a greater depth than respective depths of the input port and the output port, the cavity feature comprising:

a top wall; and

a bottom wall, disposed opposite the top wall, that achieves the greater depth for the cavity feature, the bottom wall comprising at least one curved portion configured to allow the cavity feature to achieve the allowance of the low-frequency electromagnetic energy and the rejection of the high-frequency electromagnetic energy,

wherein

the low-pass filter portion comprises a planar side wall extending from the bottom wall to the top wall, and

the at least one curved portion of the bottom wall is concave relative to the cavity feature and either i) comprises a curved surface extending from the input port to the output port, or ii) comprises a plurality of curved surfaces extending in series from the input port to the output port, each of the plurality of curved surfaces being concave relative to the cavity feature.

12 . The waveguide of claim 11 , wherein the bottom wall comprises a first elliptical portion and a second elliptical portion, the first and second elliptical portions forming the greater depth.

13 . The waveguide of claim 12 , wherein:

a first end of the first elliptical portion is substantially normal with the input port; and

a second end of the second elliptical portion is substantially normal with the output port.

14 . The waveguide of claim 12 , wherein the first elliptical portion and the second elliptical portion meet forming an extension portion that extends towards the top wall away from the greater depth.

15 . The waveguide of claim 14 , wherein the extension portion extends less than half a distance from a bottom extent of the bottom wall to the input port or the output port.

16 . The waveguide of claim 11 , wherein:

a first end of the bottom wall is substantially normal with the input port; and

a second end of the bottom wall is substantially normal with the output port.

Assignments (4)

Continuity (1)

References Cited (400)