Circuit Board Connector Clearance Structure for Impedance Match
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Solution Overview
Problem
Existing electrical connectors for circuit boards face challenges in achieving a good impedance match while allowing relative movement between the movable and stationary housings, as the impedance matching portions can cause a drop in impedance when in contact with the deformation portions.
Innovation Solution
The electrical connector features terminals with intermediate portions located within the connector's interior space, surrounded by contoured portions made of dielectric material that extend along the intermediate portions but are spaced by a clearance. This configuration allows for impedance adjustment and maintains a good impedance match without compromising the movable housing's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If impedance matching portions made of dielectric material are placed in contact with the deformation portions, then impedance adjustment is achieved, but the impedance of the deformation portions drops too low and impedance match becomes difficult to achieve
Solution Approach 1:
The patent introduces an air gap as an intermediary between the impedance matching portion and the deformation portion. This air gap prevents direct contact between the dielectric material and the terminal, avoiding excessive impedance reduction while still allowing the impedance matching portion to influence the electromagnetic field and adjust impedance to achieve a match.
Solution Approach 2:
The patent transitions from direct contact (zero-dimensional point contact) to spaced proximity (one-dimensional gap distance). By controlling the gap distance between the impedance matching portion and deformation portion, the patent achieves impedance adjustment without the harmful effect of direct contact, utilizing the spatial dimension to resolve the contradiction.
2Manufacturing precision
If contoured portions are spaced by clearance from intermediate portions, then impedance match is maintained, but the ability to follow intermediate portions during deformation is reduced
Solution Approach 1:
The patent changes the parameter of distance (clearance) between the contoured portion and intermediate portion to an optimal value that maintains impedance match. By carefully controlling this gap distance, the patent achieves impedance adjustment while the contoured portion can still elastically deform to follow the intermediate portion's movement, balancing electrical performance with mechanical adaptability.
Solution Approach 2:
The patent makes the contoured portion dynamically deformable rather than rigidly fixed. The contoured portion is designed to elastically deform and follow the intermediate portion during connector assembly and usage, maintaining both the clearance for impedance control and the adaptability for movement accommodation.
3Adaptability or versatility
If terminals are made resiliently deformable to permit movement of movable housing, then relative movement is enabled, but impedance control becomes more difficult
Solution Approach 1:
The patent segments the terminal structure into distinct functional portions: the resilient deformation portion that enables movement, and the impedance matching portion that controls impedance. By separating these functions into different segments with clear boundaries and controlled spacing, the patent allows both resilient deformation for movement and precise impedance control to coexist without interfering with each other.
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 design effectively achieves a good impedance match while enabling relative movement of the movable housing, ensuring that the impedance of the intermediate portions remains within an acceptable range even during deformation.
Implementation Method 1
the contoured portions are made of dielectric material which, relative to the intermediate portions, are positioned on the side opposite the interior space and extend along the intermediate portions while being spaced by a clearance from the intermediate portions
Implementation Method 2
the intermediate portions are adapted to be capable of relative movement with respect to the stationary housing due to resilient deformation of the intermediate portions
Data Source
AI summary
To provide an electrical connector for circuit boards capable of implementing a good impedance match while permitting relative movement of the movable housing with respect to the stationary housing. The intermediate portions 15 of the terminals 10 are, at least in part, located in the interior space 25 of the electrical connector for circuit boards 1, the electrical connector for circuit boards 1 has contoured portions 23 made of dielectric material which, relative to the intermediate portions 15, are positioned on the side opposite the interior space 25 and extend along the intermediate portions 15 while being spaced by a clearance from the intermediate portions 15, and the contoured portions 23 are capable of following the intermediate portions 15 when the intermediate portions 15 are resiliently deformed in the connector width direction perpendicular to the terminal array direction.