Host Connector Contact Terminal Homogeneity for Crosstalk Reduction
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Solution Overview
Problem
High-frequency data transmission above 100 GHz in transceiver module assemblies experiences increased crosstalk and deterioration of frequency characteristics due to the differing shapes of grounding and signal contact terminals in existing host connectors.
Innovation Solution
A host connector design featuring contact terminals where the grounding main contact terminals and signal contact terminals have identical shapes, with their contact portions aligned on a common straight line, and signal contact terminals are disposed between the grounding main contact terminals to reduce crosstalk and maintain transmission quality at high-frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If grounding contact terminals and signal contact terminals have different shapes (with grounding terminals having longer movable pieces), then grounding contact can be ensured, but crosstalk increases and frequency characteristics deteriorate at high-frequency bands above 100 GHz
Solution Approach 1:
The patent applies homogeneity by making the grounding contact terminals and signal contact terminals have identical shapes and structures. Both terminal types now have the same movable piece length, contact portion geometry, and overall configuration. This uniform design ensures that high-frequency signals experience consistent electromagnetic characteristics across all contact terminals, reducing crosstalk and preventing frequency characteristic deterioration while maintaining reliable grounding contact.
2Area of stationary object
If signal contact terminals are positioned closer to grounding terminals, then space efficiency improves, but crosstalk between adjacent channels increases
Solution Approach 1:
The patent introduces partition walls as intermediary structures positioned between adjacent signal contact terminals and between signal and grounding terminals. These partition walls create electromagnetic shielding that prevents direct coupling between adjacent channels, reducing crosstalk. The partition walls allow the terminals to be positioned closely for space efficiency while maintaining electrical isolation through the intermediary shielding structures.
3Reliability
If grounding contact terminals have longer movable piece portions, then contact reliability improves, but the differing terminal shapes cause crosstalk at high frequencies
Solution Approach 1:
The patent applies homogeneity by standardizing the movable piece length and overall shape of all contact terminals to be identical. Both grounding and signal terminals now have the same dimensional specifications, ensuring consistent electromagnetic behavior across all contacts. This uniformity maintains manufacturing precision for high-frequency applications while preserving contact reliability through the standardized contact geometry.
Data Source
AI summary
A host connector includes a connector insulator having a slot allowing detachable insertion of a plug connector of a module, a first contact terminal group including contact terminals arranged inside the connector insulator and each brought into contact with a contact pad on one side at a connection end of the plug connector, and a second contact terminal group including contact terminals each brought into contact with a contact pad on another side opposed to the aforementioned contact pad. The first contact terminal group includes grounding sub-contact terminals arranged inside slits of the connector insulator, grounding main contact terminals supporting the grounding sub-contact terminals, and signal contact terminals. Contact portions of each grounding main contact terminal and of each signal contact terminal having the same shape are arranged on a common straight line, and the signal contact terminals are disposed between the grounding main contact terminals.