Coaxial Connector Inclined Shell for Impedance Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional coaxial connectors experience impedance mismatch due to significant differences in distance between the contact and the shell's base and tip ends, leading to unnecessary reflected waves and limited high-frequency signal transmission in the high-frequency band.
Innovation Solution
The design of the coaxial connector minimizes the distance difference between the base and tip ends of the contact by using a housing and shell configuration with an inclined bottom plate piece, ensuring equal distance from the contact to the shell's bottom surface, and employing a three-point contact mechanism for improved signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the housing is thinner on the tip end side and thicker on the base end side to accommodate the bent metal plate, then the contact can be molded integrally with the housing, but the distance difference between the contact and shell bottom surface causes impedance mismatch
Solution Approach 1:
The patent applies local quality by providing an inclined surface only at the tip end side of the shell bottom surface, while keeping the base end side at a different level. This localized structural modification compensates for the bent shape of the metal plate, ensuring that the distance from the contact to the shell bottom surface is substantially equal at both ends, thereby achieving impedance matching without changing the integral molding structure.
2Manufacturing precision
If the distance from the contact to the shell bottom surface is made equal at both ends, then impedance matching is improved, but the housing structure becomes more complex
Solution Approach 1:
Rather than redesigning the entire housing structure, the patent introduces a localized inclined surface feature only at the tip end side of the shell bottom surface. This minimal structural modification achieves the goal of equalizing distances for impedance matching while keeping the overall housing structure simple and maintaining integral molding capability.
Data Source
AI summary
The present invention provides a coaxial connector that realizes a high frequency signal flowing through a contact in a high frequency band. A coaxial connector includes a three-point contact, a housing including a first and a second connection base, and a shell including a cylindrical portion accommodating the first connection base and an extension portion covering one opening of the cylindrical portion with a bottom plate piece and accommodating the second connection base. The bottom plate piece includes an inclined surface having a higher side on the base end portion of the metal plate and a lower side on the tip end side of the metal plate. The distance between the metal plate of the contact and the bottom surface of the shell which are isolated by an insulating material of the housing is configured to become identical between the tip end side and the base end side of the contact.