Stripline-to-Waveguide Transition With Flexible Substrate Placement
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Solution Overview
Problem
Current transitions from stripline to waveguide are limited to the edge of a substrate, failing to meet the increased demands for flexible and efficient line routing in advanced sensor systems, particularly in radar technology for autonomous driving.
Innovation Solution
A step-like structure within a metal or metallized block, featuring a 90° bend, allows for flexible placement of transitions on the substrate, enabling the metallized surface to function as a waveguide wall and ensuring efficient wave propagation, utilizing milling, 3D printing, or injection molding processes for production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transitions are placed only at the edge of a substrate using conventional methods, then the waveguide walls can be contacted both above and below the substrate, but the transitions cannot be distributed flexibly across the substrate surface
Solution Approach 1:
The invention moves the transition structure from a two-dimensional edge placement to a three-dimensional configuration where the substrate itself becomes part of the waveguide structure. The metallized substrate surface acts as a waveguide wall, allowing transitions to be placed anywhere on the substrate surface rather than being constrained to edges.
Solution Approach 2:
The substrate serves multiple functions: it provides mechanical support, electrical grounding, and acts as a waveguide wall. This multi-functionality eliminates the need for separate waveguide structures at edges and enables flexible transition placement across the entire substrate surface.
2Area of stationary object
If conventional transition structures are used at substrate edges, then waveguide walls can be contacted, but extensive substrate area is required for cable routing
Solution Approach 1:
The invention merges the substrate with the waveguide structure by using the metallized substrate surface as a waveguide wall. This integration eliminates the need for separate edge-mounted transition structures and reduces the substrate area required for cable routing.
3Adaptability or versatility
If the metallized substrate surface functions as a waveguide wall, then transitions can be placed anywhere on the substrate, but the waveguide structure must be reconfigured
Solution Approach 1:
The waveguide structure is segmented into sections where the metallized substrate surface forms one wall and additional metallized structures provide the remaining walls. This segmentation allows flexible transition placement while maintaining the waveguide function through modular construction.
Data Source
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AI summary
The invention relates to a transition from a stripline to a waveguide, wherein: the stripline, preferably a microstrip line, is located on a substrate; an upper side of the substrate has a metallised surface and the lower side of the substrate has a metal layer, preferably a high-frequency ground-potential layer; the upper side and the lower side are connected to vias; and at least part of the metallised surface on the upper side of the substrate acts as a waveguide wall.