Shielding Shell Recessed Face for Connector Impedance
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Solution Overview
Problem
Existing electrical connectors face challenges in impedance matching and shielding effectiveness due to the proximity of the rear shielding plate to the contact tails, which is not adequately addressed in current designs, particularly in compact devices like cellular phones and printed circuit boards.
Innovation Solution
The electrical connector features a shielding shell with a rear plate that has a recessed face opposing the contact tails, increasing the distance between them and incorporating an angled portion to maintain a compact structure while enhancing shielding, including a middle grounding plate with soldering legs and an outer cover for improved protection and assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the rear shielding plate is positioned close to the contact tails, then the device structure remains compact, but the impedance matching deteriorates and shielding effectiveness is reduced
Solution Approach 1:
The shielding plate features a recessed portion that creates localized spacing variation. The plate is not uniformly distant from contact tails, but rather has specific recessed areas that provide optimized spacing at critical locations while maintaining overall compactness. This local modification allows impedance matching improvement without sacrificing device compactness.
Solution Approach 2:
Instead of uniformly increasing the distance between the shielding plate and contact tails in one dimension (which would compromise compactness), the invention introduces dimensional variation by creating recessed portions. This transforms a one-dimensional spacing problem into a multi-dimensional structural solution, allowing selective spacing optimization at specific locations while maintaining overall compact device structure.
2Volume of moving object
If the rear shielding plate is positioned close to the contact tails, then the device structure remains compact, but the shielding effectiveness is reduced
Solution Approach 1:
The recessed portions are strategically positioned to provide enhanced shielding at critical areas where contact tails are most vulnerable to electromagnetic interference. This localized approach ensures shielding effectiveness is improved where needed most, without requiring uniform increase in overall device size.
Solution Approach 2:
The invention addresses shielding effectiveness by introducing vertical dimension variation through recessed portions, rather than simply increasing horizontal spacing. This dimensional approach allows the shielding plate to provide better electromagnetic protection at critical locations while maintaining the device's compact footprint.
3Reliability
If the distance between the rear plate and contact tails is increased, then the impedance matching is improved, but the device structure becomes less compact
Solution Approach 1:
Rather than uniformly increasing the distance between the shielding plate and all contact tails, the invention applies selective spacing through recessed portions. This allows impedance matching to be optimized at specific critical locations while maintaining minimal spacing elsewhere, thereby preserving device compactness.
Solution Approach 2:
The invention resolves the compactness versus impedance matching contradiction by transitioning from uniform one-dimensional spacing to varied multi-dimensional spacing. The recessed portions create localized vertical spacing variations that improve impedance matching without requiring overall increase in device volume.
Data Source
AI summary
An electrical connector includes: a contact module including an insulative housing and an upper and lower rows of contacts arranged in the insulative housing, the insulative housing having a base and a tongue, the upper row of contacts and the lower row of contacts being exposed to two opposite surfaces of the tongue, respectively, each contact having a contacting portion, a tail, and an intermediate portion between the contacting portion and the tail; and a shielding shell enclosing the insulative housing, the shielding shell including a rear plate proximate to the contact tails; wherein the rear plate has a recessed face opposing the contact tails to increase a distance between the rear plate and the contact tails.