Coupler Module Wiring Pattern for Parasitic Compensation
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Solution Overview
Problem
The effective coupling degree of a directional coupler mounted on a substrate can vary due to parasitic components, affecting the accuracy of detection signals, and existing methods for adjusting this coupling are time-consuming and costly.
Innovation Solution
A coupler module with a substrate featuring wiring that is either aligned with or overlaps the main line, allowing for adjustment of the coupling degree by modifying the wiring pattern without altering the directional coupler itself, thereby enabling quick and cost-effective correction of coupling deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the directional coupler is mounted on a substrate alone or with other elements, then the coupler module can be formed, but the effective coupling degree varies due to parasitic components and other elements, impairing detection signal accuracy
Solution Approach 1:
A magnetic field generating wiring is introduced as an intermediary element between the main line and the substrate. This wiring generates a magnetic field that compensates for the influence of parasitic components and other mounted elements, thereby maintaining accurate coupling degree and detection signal accuracy without requiring modification of the directional coupler itself.
Solution Approach 2:
The coupling degree is adjusted by changing the wiring pattern parameters on the substrate, specifically by modifying the position, shape, or configuration of the magnetic field generating wiring. This allows precise control of the effective coupling degree to compensate for variations caused by mounting conditions and parasitic components.
2Manufacturing precision
If the directional coupler itself is modified to adjust coupling degree, then the coupling accuracy can be improved, but the development time and cost increase significantly
Solution Approach 1:
The coupling adjustment function is segmented from the directional coupler component and implemented separately through the substrate wiring. This allows the directional coupler to remain unchanged while the substrate wiring is optimized to achieve the desired coupling degree, significantly reducing development time and cost.
Solution Approach 2:
Instead of modifying the complex directional coupler structure, a simplified wiring pattern is created on the substrate that replicates the coupling adjustment function. This wiring acts as a substitute mechanism that achieves the same goal with much lower complexity and development effort.
3Ease of manufacture
If the coupling degree is adjusted by modifying the substrate wiring pattern, then the adjustment can be made quickly and cost-effectively, but the wiring must be precisely positioned relative to the main line and sub-line
Solution Approach 1:
The magnetic field generating wiring is positioned locally in specific regions around the main line and sub-line where it most effectively influences the coupling degree. By concentrating the wiring in these critical local areas, the adjustment becomes more efficient and less sensitive to overall positioning errors.
Solution Approach 2:
The substrate wiring pattern is designed and positioned in advance during substrate fabrication, before the directional coupler is mounted. This preliminary configuration ensures that the wiring is optimally positioned to compensate for known parasitic effects and achieve the desired coupling degree from the outset.
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 allows for precise adjustment of the coupling degree without increasing the module's size, reducing costs and time compared to modifying the directional coupler, while improving the accuracy and balance of detection signals.
Implementation Method 1
a magnetic field obtained by synthesizing the magnetic fields generated by a main signal in or around a part of the wiring with the magnetic fields generated in or around the main line is caused to act on the sub-line
Implementation Method 2
capacitive coupling is formed between the part of the wiring line and the sub-line
Data Source
AI summary
A coupler module includes a coupler component formed with a main line and a sub-line that configure a directional coupler, and a module substrate on which the coupler component is mounted and on which a wiring conductor coupled in series with the main line is formed. At least a part of the wiring conductor is along the main line in plan view of the module substrate, and a direction of a main signal flowing through the main line and a direction of the main signal flowing through the part of the wiring conductor are opposite to each other.