Three-Point Coaxial Connector Structure for Miniaturized 60 GHz Contact
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Solution Overview
Problem
The existing coaxial connectors face challenges in downsizing due to their two-point contact structure, which requires terminals to spread apart, resulting in a larger size and increased outer diameter of the connector.
Innovation Solution
A coaxial connector with a three-point contact structure, featuring a pair of fixed terminals at the vertices of a virtual equilateral triangle and a movable terminal at the other vertex, allowing for elastic deformation and external contact, thereby reducing the need for terminal spreading and enabling a smaller design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-point contact structure is used, then reliable electrical connection is achieved, but the connector size increases
Solution Approach 1:
The contact structure is segmented into three separate contact points (first contact point, second contact point, and third contact point) arranged in a triangular pattern. This segmentation allows each contact point to be independently positioned to optimize both connection reliability and compactness, eliminating the need for terminal spreading while maintaining reliable electrical connection.
Solution Approach 2:
The contact points are arranged in a two-dimensional triangular configuration rather than a linear two-point arrangement. By transitioning from a one-dimensional linear contact structure to a two-dimensional triangular contact structure, the design achieves reliable electrical connection without requiring the terminals to spread apart horizontally, thereby reducing connector size.
2Reliability
If terminals are spread apart to allow displacement, then contact reliability is improved, but the outer diameter of the fitting portion increases
Solution Approach 1:
The contact structure is divided into three separate contact points positioned at the vertices of an equilateral triangle. This segmentation allows each contact point to maintain optimal positioning without requiring horizontal spreading, enabling reliable contact while keeping the fitting portion compact with a reduced outer diameter.
Solution Approach 2:
The contact points are arranged in a triangular configuration in the radial direction rather than spreading linearly. This two-dimensional arrangement allows the contact points to be distributed around the circumference, achieving reliable contact without increasing the axial length or requiring excessive radial spread, thus reducing the outer diameter of the fitting portion.
3Volume of moving object
If a compact design is pursued, then connector size is reduced, but contact structure complexity increases
Solution Approach 1:
The contact structure uses three contact points with distinct local characteristics: two fixed contact points and one movable contact point. This local differentiation optimizes each contact point's function while maintaining overall compactness, achieving a balance between compact design and manageable structural complexity.
Solution Approach 2:
The contact structure employs an asymmetric configuration where two contact points are fixed and one contact point is movable. This asymmetric design breaks the symmetry of a purely rigid triangular arrangement, allowing for thermal expansion compensation while maintaining compact dimensions and keeping the structural complexity at an acceptable level.
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 three-point contact configuration allows for a more compact coaxial connector design while maintaining reliable electrical connections, inhibiting impedance disturbance and increasing the high-frequency signal band up to 60 GHz.
Implementation Method 1
a movable terminal that can be elastically deformed located at the other vertex
Data Source
AI summary
The present invention provides a further miniaturized coaxial connector. A coaxial connector includes a contact by 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 accommodating the second connection base. The contact disposed inside an accommodation space on the first connection base, includes three terminals including a pair of fixed terminals and a movable terminal that are erected from a tip end side of a metal plate. The pair of fixed terminals are located at a set of vertices among vertices of a virtual equilateral triangle inscribed in a mating contact, the movable terminal is located at the other vertex of the virtual equilateral triangle, and a contact surface of the movable terminal is disposed in a state of facing an intermediate portion of the pair of fixed terminals.