Coaxial Connector Plate Spring Vertical Orientation
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Solution Overview
Problem
Traditional coaxial connectors suffer from deteriorated radio-frequency characteristics due to impedance mismatching caused by the wide plate spring portion, which affects signal path connectivity in mobile communication devices.
Innovation Solution
The coaxial connector design features a plate spring portion that linearly extends from the movable terminal to the fixed terminal, ensuring alignment with the signal path and reducing the width required for impedance matching, thereby enhancing radio-frequency characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If the plate spring portion extends in the y-direction to provide sufficient elastic force, then the elastic force is adequate, but the width increases causing impedance mismatching and deteriorated radio-frequency characteristics
Solution Approach 1:
The plate spring portion is reoriented to extend in the z-direction (vertical direction) instead of the y-direction (horizontal direction). This dimensional change allows the plate spring to achieve sufficient elastic force through vertical curvature while maintaining a narrow width that matches the signal path dimensions, thereby resolving the impedance mismatching problem.
Solution Approach 2:
The patent changes the geometric parameters of the plate spring portion by extending it in the z-direction with a curvature radius R3, and adjusts its width to be substantially equal to the width of the signal path. This parameter optimization enables the plate spring to provide adequate elastic force while maintaining proper impedance matching for radio-frequency signals.
2Force
If the plate spring portion is made wider to provide sufficient length for elastic force, then the elastic force is adequate, but impedance matching is undone and radio-frequency characteristics deteriorate
Solution Approach 1:
The plate spring portion transitions from horizontal extension (y-direction) to vertical extension (z-direction), allowing it to achieve the necessary length for elastic force without increasing the horizontal width. This maintains impedance matching and preserves radio-frequency characteristics while providing sufficient elastic force through the vertical curvature.
Solution Approach 2:
The plate spring portion is designed with different geometric characteristics in different directions: it has a sufficient length in the z-direction (with curvature radius R3) to provide elastic force, while maintaining a narrow width in the x-direction that matches the signal path width for proper impedance matching.
3Device complexity
If the plate spring portion extends in the y-direction, then the structure is simple, but the width becomes larger than other sections causing impedance mismatching
Solution Approach 1:
The plate spring portion is reconfigured to extend in the z-direction rather than the y-direction. This maintains structural simplicity while ensuring the width in the x-direction matches the signal path width, thereby achieving proper impedance matching without complicating the overall structure.
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
This design achieves better impedance matching and radio-frequency performance, allowing for a smaller size and reduced profile while maintaining reliable connectivity and stability.
Implementation Method 1
the plate spring portion 44 has a shape that is curved so as to protrude in the positive z-direction. The contact portion 146 protrudes from the central part of the plate spring portion 144 in the y-direction to the positive x-direction and is pressed in contact with the contact portion 150 by an urging force of the plate spring portion 144.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
There is provided a coaxial connector having a good radio-frequency characteristic. A main body (14) has a hole that allows a probe to be inserted therein. A fixed terminal (22) is fixed to the main body (14). A movable terminal (20) includes a fixed portion (42) fixed to the main body (14) and a plate spring portion (44) extending from the fixed portion (42) toward the fixed terminal (22). The plate spring portion (44) is in contact with the fixed terminal (22) and in contact with the main body (14) at its tips (ta, tb). The plate spring portion (44) is displaced by the probe in a direction away from the fixed terminal (22).