RF Connector Structure for Impedance Matching in Dense Assemblies
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Solution Overview
Problem
Existing RF connectors face issues with characteristic impedance mismatch, leading to signal distortion and power transmission deterioration, particularly during assembly, and are limited by a bulky design that restricts high-density installation in communication apparatuses.
Innovation Solution
A connector design featuring a stationary module with an impedance matching space, a moving module, and an elastic member supported by an external conductor part to prevent direct contact with insulators, allowing for impedance matching and a slimmer form factor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an elastic member in the form of a coil spring is provided to absorb assembling tolerance, then assembling tolerance is easily absorbed, but the connector diameter must be increased to accommodate the elastic member outside the hollow portion
Solution Approach 1:
The elastic member is nested inside the hollow portion of the contact body, with one end supported on the inner wall of the hollow portion and the other end supporting the contact pin. This nesting arrangement allows the elastic member to be contained within the existing structural space, eliminating the need to increase the connector diameter while still providing the necessary elastic support function.
Solution Approach 2:
The elastic member is repositioned from an external location (outside the hollow portion) to an internal location (inside the hollow portion), utilizing the vertical/z-axis dimension within the existing diameter constraint. This dimensional repositioning allows the same functional requirement to be met without increasing the radial dimension.
2Reliability
If the elastic member is positioned outside the hollow portion to prevent characteristic impedance mismatch, then impedance matching is maintained, but the product size increases and high-density installation is restricted
Solution Approach 1:
The elastic member is nested within the hollow portion of the contact body, utilizing the internal void space that already exists in the connector structure. This nesting approach maintains the impedance matching function while containing the elastic member within the existing external dimensions, thereby reducing overall product size and enabling high-density installation.
3Adaptability or versatility
If the connector is designed with a larger diameter to accommodate the elastic member, then assembling tolerance can be absorbed, but the connector becomes bulkier and cannot be installed at high density
Solution Approach 1:
The elastic member is nested inside the hollow portion of the contact body, utilizing the internal space rather than requiring external space. This allows the connector to maintain a compact external diameter while still incorporating the elastic member needed for assembling tolerance absorption.
Solution Approach 2:
The position parameter of the elastic member is changed from external to internal location, and the support location on the contact pin is changed from the outer peripheral surface to the inner peripheral surface. These parameter changes enable the same functional capability with a reduced external dimension.
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 design effectively prevents impedance mismatch, reduces product size, and enables high-density installation in communication devices, improving signal integrity and efficiency.
Implementation Method 1
an elastic member (410) provided in the form of a coil spring is accommodated in the hollow portion 210a of the stationary body 210 and the hollow portion 110a of the contact body 110. The elastic member 410 is fixed by the stationary insulator 230 and the contact insulator 130 that are made of dielectric materials having predetermined permittivity. One end of the elastic member 410 is supported on the stationary body 210, and the other end of the elastic member 410 is supported on the contact body 110. The elastic member 410 maintains a predetermined contact force by elastically supporting the contact body 110 on the second panel while being compressed and extended by an external force transmitted during an assembling process.
Data Source
AI summary
A connector for preventing a characteristic impedance mismatch includes a stationary module fixed, by soldering, to any one (a ‘first panel’) of two panels disposed in parallel with each other, the stationary module having therein an impedance matching space (a ‘matching space’), a moving module disposed to move to the inside or outside of the matching space of the stationary module and provided to be in contact with the other (a ‘second panel’) of the two panels, and an elastic member disposed in the matching space of the stationary module and configured to elastically support the moving module on the second panel, in which the elastic member, together with an external conductor part of the moving module, performs a function of blocking static electricity, which makes it possible to manufacture a product with a reduced size and prevent a characteristic impedance mismatch.