Electrical Connection Socket Impedance Matching
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Solution Overview
Problem
In electrical connection sockets, the signal pin is typically held by an insulating member with higher relative permittivity than air, causing impedance mismatch and signal deterioration due to reflection phenomena in the signal path.
Innovation Solution
An electrical connection socket design where the signal pin forms a coaxial line with the metal housing's inner wall, using holding members with low permittivity to maintain impedance matching by creating regions with characteristic impedances lower and higher than a reference value, compensating for the reduction in the holding region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an insulating holding member with higher relative permittivity than air is used to hold the signal pin, then the signal pin can be mechanically supported in the communication hole, but impedance mismatch occurs and signal deterioration results due to reflection phenomena in the signal path
Solution Approach 1:
The patent changes the relative permittivity parameter of the holding member from conventional high-permittivity insulating materials to a material with lower relative permittivity (closer to air). This parameter change reduces the impedance discontinuity at the holding member interface, minimizing reflection phenomena and improving signal transmission reliability while maintaining adequate mechanical support for the signal pin
Solution Approach 2:
The patent applies local quality by making the holding member's permittivity characteristic localized and different from conventional designs. Instead of using uniform high-permittivity material throughout, the holding member is designed with permittivity closely matched to air in the regions affecting the signal path, creating localized impedance matching while still providing mechanical support where needed
2Strength
If the holding member has larger relative permittivity than air, then the holding member can provide adequate mechanical support, but the characteristic impedance varies between the region held by the holding member and other regions
Solution Approach 1:
The patent modifies the permittivity parameter of the holding member to be lower (closer to air), which reduces impedance variation along the signal path. This allows for better impedance matching precision while maintaining sufficient holding strength through optimized mechanical design of the holding member structure
Solution Approach 2:
The patent promotes homogeneity in the permittivity characteristics along the signal path by using a holding member with permittivity close to air. This reduces the discontinuity between different regions of the signal path, ensuring more uniform characteristic impedance throughout the transmission line
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
Ensures impedance matching in the signal path, reducing signal deterioration during transmission while maintaining mechanical stability of the signal pin.
Implementation Method 1
the signal pin forms a so-called coaxial line with the inner wall surface of the communication hole of the metal housing, and provides an impedance-matched signal path between the electrical component and the circuit board
Implementation Method 2
the holding member typically has a larger relative permittivity than that of air. As such, in a signal path of a coaxial structure formed by the signal pin and the inner peripheral surface of the communication hole, the characteristic impedance may be varied between the region held by the holding member and other regions
Implementation Method 3
signal deterioration may result due to a reflection phenomenon in the signal path
Data Source
AI summary
This electrical connection socket for relaying exchange of electrical signals between a first electrical component and a second electrical component, is provided with: a signal pin which is inserted in a communication hole of a metallic casing so as to form a coaxial line path between the inner wall surface of the communication hole and the outer circumferential surface of the signal pin so that one end of the signal pin is electrically connected to a terminal of the first electrical component while the other end is electrically connected to a terminal of the second electrical component; and a holding member which holds the signal pin in the communication hole such that the outer circumferential surface of the signal pin is separated from the inner wall surface of the communication hole, wherein the characteristic impedance of a signal path formed by the signal pin in a first region where the signal pin is held by the holding member is smaller than a predetermined characteristic impedance which is a reference, and the characteristic impedance in a second region adjacent to the first region is larger than the predetermined characteristic impedance.