BNC Connector C-Ring Stability for High-Frequency Signals
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Solution Overview
Problem
BNC coaxial connectors experience unstable contact at high frequencies due to vibrations and prying, leading to momentary disengagement and poor frequency characteristics, especially above 4 GHz, as conventional spring contact structures are prone to deformation and instability.
Innovation Solution
The electrical connector incorporates a cylindrical outer conductor with a housing groove for a band-shaped C-ring, featuring a slope in the inner diameter that is smaller on the front end side, providing linear or multiple-point contact stability, and a knurled or corrugated C-ring for enhanced flexibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring contact structure is used to improve frequency characteristics, then high-frequency transmission capability is improved, but contact stability deteriorates under vibration and prying
Solution Approach 1:
The patent changes the material parameter from conventional elastic materials like brass to a material with low elastic modulus (0.3-0.5 MPa). This fundamental parameter change transforms the contact mechanism from elastic deformation-based to friction-based stable contact, resolving the contradiction between high-frequency capability and contact stability under vibration and prying conditions
Solution Approach 2:
The patent employs composite construction by combining the low elastic modulus material with existing spring contact structure. The composite approach integrates the stabilizing effect of low-elasticity material with the electrical contact function, achieving both improved frequency characteristics and enhanced contact stability without complete structural redesign
2Ease of manufacture
If general elastic materials like brass are used for the outer conductor, then ease of manufacture is improved, but contact stability deteriorates due to easy deformation by prying
Solution Approach 1:
The patent fundamentally changes the material selection criterion from conventional elastic materials (brass) to materials with specifically low elastic modulus (0.3-0.5 MPa). This parameter change directly addresses the deformation issue under prying while maintaining manufacturability through standard fabrication processes, thus resolving the contradiction between ease of manufacture and contact stability
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
The solution ensures stable contact and improved high-frequency characteristics even under prying or vibration, reducing the risk of electrical disengagement and maintaining consistent signal transmission.
Implementation Method 1
a knurled or corrugated C-ring for enhanced flexibility and stability
Data Source
AI summary
Provided is a technology for improving high-frequency characteristics in an electrical connector such as a BNC coaxial connector. An electrical connector according to the present disclosure includes: a cylindrical outer conductor; a center terminal located on a central axis of the outer conductor along an axial direction of the central axis; an insulator located coaxially between the outer conductor and the center terminal; and a band-shaped C-ring located inside the outer conductor. The outer conductor includes a housing groove for housing the C-ring, the housing groove being formed on an inner peripheral surface of the outer conductor on a front end side of the center terminal, and the housing groove includes a slope of which inner diameter is smaller on a front end side than on a rear end side, the slope being formed on a front end portion of the housing groove. An end surface on a front end side of the C-ring is corrugated.