High-Frequency Waveguide Coupling for 60 GHz Radar Assembly
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Solution Overview
Problem
High-frequency radar signal generation and processing in radar-based fill-level measuring devices face challenges due to the limitations of hybrid connection technologies, which result in signal attenuation and interference, making it difficult to achieve reliable and efficient signal routing above 60 GHz frequencies.
Innovation Solution
A high-frequency component comprising a semiconductor component and a substrate-integrated waveguide coupling element that establishes a galvanic contact, allowing efficient decoupling and coupling of radar signals without requiring precise adjustment of the hollow waveguide's position, and using known assembly technologies for contacting and encapsulation to simplify manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If hybrid connection technologies (bond wires, soldering points) are used to route radar signals, then the semiconductor component can be mounted on a circuit board, but signal attenuation and interference increase significantly at frequencies above 60 GHz
Solution Approach 1:
The patent extracts the problematic hybrid connection structures (bond wires, soldering points, external conductor tracks) from the signal path by implementing a monolithic integration where the antenna is directly formed on the semiconductor chip substrate. This eliminates the intermediate connection elements that cause signal attenuation at high frequencies above 60 GHz.
Solution Approach 2:
The patent merges the antenna structure with the semiconductor chip substrate itself, creating an integrated component where the antenna is formed directly on the chip. This combines the semiconductor component and antenna into a single monolithic structure, eliminating the need for separate mounting and connection structures.
2Reliability
If the hollow waveguide is positioned at a precisely defined distance above the semiconductor component, then efficient coupling of radar signals is achieved, but the assembly process becomes complex and time-consuming
Solution Approach 1:
The patent incorporates the antenna structure directly on the semiconductor chip substrate during the manufacturing process, preparing the signal coupling interface in advance. This preliminary integration eliminates the need for precise post-assembly positioning of the hollow waveguide, as the coupling geometry is predetermined by the monolithic structure.
Solution Approach 2:
The monolithic integration causes the hollow waveguide to self-align with the antenna structure on the semiconductor chip. The geometric relationship between the waveguide and the integrated antenna automatically ensures efficient coupling without requiring external adjustment or precise positioning during assembly.
3Volume of moving object
If the hollow waveguide is attached directly to the semiconductor component, then compact design is achieved, but mechanical stress is applied to the sensitive semiconductor component
Solution Approach 1:
The patent segments the mounting structure by introducing an intermediate layer between the hollow waveguide and the semiconductor chip. This separation divides the mechanical load path, allowing the waveguide to be mounted on a support structure rather than directly on the sensitive semiconductor component, thereby reducing mechanical stress while maintaining compact dimensions.
4Ease of manufacture
If standard hybrid technologies are used for contacting the semiconductor component, then conventional manufacturing processes can be employed, but the connection structures disturb signal transmission as parasitic elements at high frequencies
Solution Approach 1:
The patent removes the parasitic connection structures (bond wires, soldering points, external conductor tracks) from the signal path by implementing direct integration of the antenna on the semiconductor chip substrate. This extraction eliminates the sources of parasitic interference that plague high-frequency signal transmission above 60 GHz.
Solution Approach 2:
The patent replaces the mechanical hybrid connection system (bond wires, soldering) with an integrated electromagnetic structure where the antenna is formed directly on the chip substrate. This substitution eliminates the mechanical connection elements that introduce parasitic effects, using instead a monolithic electromagnetic integration approach.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient high-frequency signal transmission with reduced mechanical stress on the semiconductor component, allowing for higher frequency operations without signal attenuation, and simplifies the assembly process by eliminating the need for precise positioning of the hollow waveguide, thereby enhancing the reliability and performance of radar-based distance measuring devices.
Implementation Method 1
a substrate-integrated waveguide coupling element that establishes a galvanic contact, allowing efficient decoupling and coupling of radar signals
Data Source
AI summary
A high-frequency component for radar-based distance measurement comprises: a semiconductor component configured to generate electrical high-frequency signals; and coupling element configured as a substrate-integrated waveguide and electrically contacted by the semiconductor component as to couple the high-frequency signals as radar signals into a hollow waveguide of the high-frequency component, the hollow waveguide being in galvanic contact with the coupling element such that no defined distance between the hollow waveguide and the coupling element must be set to achieve an efficient coupling out of the high-frequency signal into the hollow waveguide. The galvanic contact thereby enables a simple manufacture of the high-frequency component and a compact and accurate distance measuring device using the high-frequency component.