Connector Shield Case Segmentation for Impedance Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional coaxial connectors face design flexibility limitations due to the requirement of matching impedances between terminal portions, which restricts the shape of the mounting portion and hinders flexible design.
Innovation Solution
A connector design featuring a shield case with separate first and second shells, allowing for independent formation of the composite tube to achieve matched impedances between terminal portions, enabling flexible design without adverse effects on impedance matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the shield case is formed by stamping a metal plate to make the mounting portion contiguous with the connecting portion, then the manufacturing process is simplified, but the design flexibility is restricted and impedance matching becomes difficult
Solution Approach 1:
The shield case is divided into two separate shells: a first shell including the connecting portion and a second shell including the mounting portion. This segmentation allows each shell to be designed and manufactured independently, enabling optimized impedance matching for each terminal portion while maintaining manufacturing simplicity through standardized stamping processes for each component.
Solution Approach 2:
The second shell is attached to the first shell to form a composite structure that houses the terminal. The nested arrangement of the two shells creates the mounting portion with optimized geometry for impedance matching, while both shells can be produced using conventional stamping techniques.
2Device complexity
If the mounting portion is designed to be contiguous with the connecting portion, then the shield case structure is simplified, but the impedance matching between terminal portions is compromised
Solution Approach 1:
By separating the shield case into two shells, each can be independently shaped to achieve optimal impedance characteristics. The first shell's connecting portion and the second shell's mounting portion can be designed with specific geometries that match impedance requirements, rather than being constrained by a single contiguous structure.
Solution Approach 2:
The second shell extends in a direction orthogonal to or oblique relative to the first shell, creating a composite tube structure that provides additional dimensional freedom for impedance optimization. This multi-directional arrangement allows independent optimization of each terminal portion's electromagnetic environment.
3Adaptability or versatility
If the second shell is made as a separate member from the first shell, then the design flexibility is improved, but the device complexity increases
Solution Approach 1:
The division into two shells provides design flexibility for optimizing each terminal portion's impedance characteristics. Despite the increased structural elements, each shell remains a relatively simple stamped component, and their assembly is straightforward, balancing complexity with performance benefits.
Solution Approach 2:
The second shell's orthogonal or oblique extension from the first shell creates a composite tube structure that enables flexible terminal routing and impedance matching. This multi-dimensional arrangement provides design freedom without requiring complex three-dimensional forms for each individual shell.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
The invention provides a connector having a high degree of design flexibility. A connector C1 includes a shield case 100, a body 200, and a terminal 300. The shield case 100 includes a first shell 100a and a second shell 100b. The first shell 100a includes a connecting portion 110a extending in Y-Y' direction and a cover 120a extending in the Y-Y' direction. The second shell 100b is a separate member from the first shell 100a. The second shell 100b and the cover 120a constitute a composite tube extending in the Z-Z' directions. The body 200 and the terminal 300 held by the body 200 are housed in the shield case 100. The terminal 300 includes a first portion 310 and a second portion 320. The first portion 310 extends in the Y-Y' directions and is disposed inside the connecting portion 110a. The second portion 320 extends in the Z-Z' directions and is disposed inside the composite tube. The impedances of the two portions of the terminal 300 may be matched by adjusting the distances between the respective portions of the terminal 300 and the walls of their adjacent shells.