Shield Connector Interface Structure for Impedance Matching
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Solution Overview
Problem
Existing shield connectors experience impedance mismatching due to large air layers between male inner and outer conductors, leading to increased impedance in certain regions and reduced performance in high-speed communication.
Innovation Solution
A shield connector design with a male connector and female connector configuration, where a thin portion of the male dielectric is cut to surround the base end of the male inner conductor tab, and impedance adjusting portions on the female or male outer conductor cover the thin portion to minimize air gaps and maintain consistent impedance across the connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a large air layer is interposed between the male inner conductor terminal and the male outer conductor terminal in the male space portion, then impedance is increased, but impedance mismatching occurs due to the impedance difference between regions with air layers and regions with dielectric material
Solution Approach 1:
The patent applies local quality by creating a thin portion of the male dielectric with a different thickness than other regions. This thin portion is specifically located at the connection interface where the male and female connectors join, allowing the dielectric to provide impedance control exactly where needed while maintaining the necessary air gaps in other regions for signal integrity.
Solution Approach 2:
The patent changes the physical parameter of the dielectric thickness by forming a thin portion with reduced thickness compared to the main body of the dielectric. This parameter change allows the dielectric to have minimal impact on impedance in the connection region while still providing electrical isolation and mechanical support.
2Object-affected harmful factors
If a thin portion of the male dielectric is formed to surround the base end portion of the tab, then the air layer is reduced and impedance is maintained, but the manufacturing complexity increases due to the additional cutting process
Solution Approach 1:
The patent segments the male dielectric into two distinct regions: a main body portion with normal thickness and a thin portion with reduced thickness. This segmentation allows each region to serve its specific function - the main body provides overall structural support and isolation, while the thin portion optimizes impedance characteristics at the connection interface.
Solution Approach 2:
The thin portion of the male dielectric is pre-formed during the dielectric manufacturing process before the actual connector assembly is assembled. This preliminary action ensures that the impedance-optimizing geometry is already in place, eliminating the need for additional field modifications or adjustments during assembly.
3Object-affected harmful factors
If impedance adjusting portions are added to the female or male outer conductor to cover the thin portion, then impedance control is improved, but the device complexity and manufacturing steps increase
Solution Approach 1:
The patent merges the impedance adjusting portions with the outer conductors of the male or female connectors. By integrating these impedance-control features directly into the existing outer conductor structures, the patent avoids adding separate, independent components that would require additional assembly steps.
Solution Approach 2:
The outer conductors serve multiple functions: they provide electromagnetic shielding, mechanical support, and now also serve as impedance adjusting structures through the integrated impedance adjusting portions. This multi-functionality reduces the total number of components needed in the connector assembly.
Data Source
AI summary
A male connection surface of the male dielectric and a female connection surface of the female dielectric are facing each other and an elongated tab of the male inner conductor projects from the male connection surface and is inserted in the female inner conductor with the male connector and the female connector connected. A thin portion shaped by cutting an outer surface of the male dielectric and configured to surround a base end portion of the tab is formed on an end part of the male dielectric on the side of the male connection surface. The female outer conductor is formed with an impedance adjusting portion configured to proximately cover an outer surface of the thin portion.