Microwave Transition Structure for Surface Mount Waveguide Coupling
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Solution Overview
Problem
Surface mount microwave systems face electrical design constraints that limit their efficiency, particularly in the frequency range from 42 GHz to 60 GHz, due to the need for waveguide reflectors and complex electromagnetic coupling with microstrip lines.
Innovation Solution
A dedicated microwave transition structure is integrated into the multilayer arrangement of the surface mount microwave system, allowing direct electromagnetic coupling between the microstrip line and the hollow microwave waveguide, eliminating the need for a cover with a waveguide reflector and enabling a more efficient design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover with waveguide reflector is used to electromagnetically couple microstrip lines to hollow waveguide, then electromagnetic coupling is achieved, but electrical design constraints increase and device complexity increases
Solution Approach 1:
The patent extracts and eliminates the cover with waveguide reflector from the traditional coupling structure. By removing this component, the invention directly couples the microstrip line to the hollow waveguide through a simplified transition structure integrated into the substrate, thereby reducing electrical design constraints while maintaining coupling efficiency
Solution Approach 2:
The patent merges the transition structure with the substrate by integrating it into the second conductive layer. This consolidation eliminates the need for separate cover and reflector components, reducing device complexity and electrical design constraints while achieving effective electromagnetic coupling
2Reliability
If a cover with waveguide reflector is used for electromagnetic coupling, then signal transmission is achieved, but manufacturing complexity increases
Solution Approach 1:
The transition structure is merged with the substrate and formed as part of the multilayer construction process. The hollow waveguide is formed in the second conductive layer during standard PCB manufacturing, eliminating the need for separate cover assembly and reflector installation steps
Solution Approach 2:
The invention segments the waveguide structure by forming the hollow waveguide directly in the second conductive layer of the substrate. This allows the transition structure to be manufactured using standard multilayer PCB techniques, significantly easing manufacturing complexity compared to assembling separate cover and reflector components
3Adaptability or versatility
If traditional electromagnetic coupling structure is used, then frequency operation up to 60 GHz is achieved, but electrical constraints limit operation beyond 60 GHz
Solution Approach 1:
By removing the cover with waveguide reflector, the invention eliminates the electrical constraints imposed by this component. The direct coupling between microstrip line and hollow waveguide enables broader frequency operation beyond 60 GHz, achieving adaptability up to 90 GHz and higher
Solution Approach 2:
The simplified transition structure provides universal electromagnetic coupling capability across a broad frequency range. By eliminating frequency-specific constraints of the cover-reflector assembly, the structure becomes adaptable to multiple frequency bands from microwave through millimeter-wave ranges
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 approach reduces electrical constraints, enhancing the efficiency of the surface mount microwave system and allowing operation up to 90 GHz, while simplifying the design and manufacturing process by eliminating the need for complex waveguide reflectors and improving signal propagation.
Implementation Method 1
a microwave transition structure for electromagnetically coupling the first conductive layer with the hollow microwave waveguide
Implementation Method 2
the microwave transition structure comprises a conductive microstrip radiating pattern being formed on the dielectric layer for irradiating an electromagnetic wave towards the hollow microwave waveguide
Data Source
AI summary
The invention relates to a surface mount microwave system, comprising a multilayer arrangement comprising a first conductive layer, a second conductive layer and a dielectric layer, wherein the first conductive layer is arranged on the dielectric layer, and wherein the dielectric layer is arranged on the second conductive layer, wherein the first conductive layer comprises a microwave circuit and wherein the second conductive layer forms a reference potential layer, a hollow microwave waveguide being at least partly formed in the second conductive layer, and a microwave transition structure for electromagnetically coupling the first conductive layer with the hollow microwave waveguide. According to some implementation forms, a reflector on a cover covering the multilayer arrangement may be avoided.