Feed to waveguide transition structures and related sensor assemblies
Waveguide module assemblies for vehicles, such as radar sensor waveguide feed to waveguide transition assemblies. In some embodiments, an antenna module may comprise an antenna assembly that includes a resonating element and a waveguide component that defines, at least in part, a waveguide configured to guide electromagnetic energy radiating from the resonating element. The resonating element of the antenna assembly may directly feed electromagnetic energy into the waveguide defined by the waveguide component.
1. A waveguide module, comprising:
a feed component, the feed component comprising a conductive ground layer, a conductive top layer, and a substrate disposed between the conductive ground layer and the conductive top layer, the conductive top layer comprising:
a first portion defining a resonating patch coupled to a feed input of the waveguide module by a feed, and
a second portion conductively isolated from the first portion and coupled to the conductive ground layer by a plurality of conductive vias defined in the substrate; and
a waveguide component, the waveguide component comprising a plurality of posts, the plurality of posts at least in part defining a waveguide, the waveguide component being coupled with the feed component such that the resonating patch directly feeds the waveguide, the waveguide defining a waveguide output of the waveguide module, and wherein the plurality of posts comprises:
at least a first row of posts defining a first side of the waveguide; and
at least a second row of posts defining a second side of the waveguide opposite the first side of the waveguide.
2. The waveguide module of claim 1 , wherein the at least a first row of posts and the at least a second row of posts each comprise a plurality of rows of posts.
3. The waveguide module of claim 1 , wherein the waveguide component further comprises at least one termination post.
4. The waveguide module of claim 3 , wherein the at least one termination post comprises at least one feed line termination post disposed proximate to the feed line.
5. The waveguide module of claim 4 , wherein the at least one feed line termination post is shorter in height than at least one of the plurality of posts of the waveguide component such that the at least one feed line termination post does not physically contact the feed line.
6. The waveguide module of claim 1 , wherein the waveguide component further comprises a ridge disposed within at least a portion of the waveguide.
7. The waveguide module of claim 6 , wherein at least a portion of the ridge is more prominent than other portions of the ridge, the at least a portion of the ridge being disposed, at least in part, over the resonating patch.
8. The waveguide module of claim 7 , wherein a transition between the at least a portion of the ridge and the other portions of the ridge comprises at least one of a sloped transition and a stepped transition.
9. The waveguide module of claim 1 , wherein the plurality of conductive vias are configured to surround at least a part of the first portion of the feed component.
10. The waveguide module of claim 1 , wherein the conductive ground layer, the conductive top layer, and the substrate of the feed component comprise printed circuit board layers.
11. The waveguide module of claim 1 , wherein the feed is defined by the first portion of the conductive top layer.
12. The waveguide module of claim 1 , wherein the resonating patch comprises at least one of a square resonating patch, a rectangular resonating patch, a circular resonating patch, a triangular resonating patch, an elliptical resonating patch, a hexagonal resonating patch, a pentagonal resonating patch, a rhomboid resonating patch, and a ring resonating patch.
13. The waveguide module of claim 1 , wherein the feed comprises at least one of a coplanar wave guide, a microstrip feed line, a strip feed line, an aperture coupled feed, a proximity coupled feed, and a coaxial feed.
14. A waveguide module, comprising:
a feed component, the feed component comprising a conductive ground layer, a conductive top layer, and a substrate disposed between the conductive ground layer and the conductive top layer, the conductive top layer comprising:
a first portion defining a resonating patch coupled to a feed input of the waveguide module by a feed, and
a second portion conductively isolated from the first portion and coupled to the conductive ground layer by a plurality of conductive vias defined in the substrate; and
a waveguide component, the waveguide component comprising a plurality of posts, the plurality of posts at least in part defining a waveguide, the waveguide component being coupled with the feed component such that the resonating patch directly feeds the waveguide, the waveguide defining a waveguide output of the waveguide module, and wherein the waveguide component further comprises at least one termination post.
15. The waveguide module of claim 14 , wherein the at least one termination post comprises at least one feed line termination post disposed proximate to the feed line.
16. The waveguide module of claim 15 , wherein the at least one feed line termination post is shorter in height than at least one of the plurality of posts of the waveguide component.
17. A waveguide module, comprising:
a feed component, the feed component comprising a conductive ground layer, a conductive top layer, and a substrate disposed between the conductive ground layer and the conductive top layer, the conductive top layer comprising:
a first portion defining a resonating patch coupled to a feed input of the waveguide module by a feed, and
a second portion conductively isolated from the first portion and coupled to the conductive ground layer by a plurality of conductive vias defined in the substrate; and
a waveguide component, the waveguide component comprising a plurality of posts, the plurality of posts at least in part defining a waveguide, the waveguide component being coupled with the feed component such that the resonating patch directly feeds the waveguide, the waveguide defining a waveguide output of the waveguide module, wherein the waveguide component further comprises a ridge disposed within at least a portion of the waveguide, and wherein at least a portion of the ridge is more prominent than other portions of the ridge, the at least a portion of the ridge being disposed, at least in part, over the resonating patch.
18. The waveguide module of claim 17 , wherein the waveguide component further comprises at least one termination post.
19. The waveguide module of claim 18 , wherein the at least one termination post comprises at least one feed line termination post disposed proximate to the feed line.
20. The waveguide module of claim 17 , wherein a transition between the at least a portion of the ridge and the other portions of the ridge comprises at least one of a sloped transition and a stepped transition.