Electrical Connector Ground Shields Joined by Commoning Features
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Solution Overview
Problem
Existing mezzanine electrical connectors face challenges in signal performance due to non-electrically commoned ground shields along the beam length, leading to electrical interference and compromised signal integrity.
Innovation Solution
The design includes a housing with signal contacts and ground shields that are electrically joined through commoning features, ensuring that the ground shields are mechanically engaged to form a continuous electrical pathway, thereby improving signal integrity by reducing noise and enhancing shielding across the connector array.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If ground shields are used to shield individual contacts or contact pairs along the beam length, then signal shielding is improved, but electrical interference between adjacent ground shields occurs due to lack of commoning along the beam length
Solution Approach 1:
Multiple separate ground shields are merged into a single electrically commoned structure through conductive connectors. The ground shields, which were previously isolated along the beam length, are now electrically connected to form a unified shielding system that eliminates interference between adjacent shields while maintaining signal integrity.
2Ease of manufacture
If ground shields are electrically commoned at the circuit boards only, then assembly is simplified, but electrical interference occurs along the beam length and at the mating interface
Solution Approach 1:
The electrical commoning is extended from a single point at the circuit board into a continuous pathway along the beam length. Conductive connectors are positioned at multiple locations along the beam length to create a distributed electrical commoning system, transforming the commoning from a zero-dimensional point connection to a one-dimensional continuous pathway.
3Adaptability or versatility
If multiple mezzanine connectors are used to interconnect circuit boards, then connectivity is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
Multiple separate ground shield structures are merged into a single integrated shielding system through conductive connectors. This consolidation reduces the number of independent components and simplifies the overall connector assembly while maintaining the required connectivity and shielding functions.
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 solution effectively cancels signal noise, improves inter-pair signal skew, and raises resonant frequencies, resulting in enhanced electrical performance and reduced interference within the connector assembly.
Implementation Method 1
The commoning feature mechanically engages another ground shield in a group of ground shields to electrically join the ground shields of the group within the cavity
Implementation Method 2
The ground shields extend along the signal contacts in the cavity. The ground shields have center walls and side walls surrounding associated pairs of the signal contacts on at least two sides thereof
Data Source
AI summary
An electrical connector includes a housing, signal contacts, and ground shields. The housing extends between a front end and a rear end and defines a cavity at the front end. The signal contacts are held by the housing and are arranged in pairs carrying differential signals. The signal contacts have mating ends in the cavity for mating with a mating connector. The ground shields are held by the housing and extend along the signal contacts in the cavity. The ground shields have center walls and side walls surrounding associated pairs of the signal contacts on at least two sides thereof. The ground shields each have a commoning feature extending outward from a corresponding side wall. The commoning feature mechanically engages another ground shield in a group of ground shields to electrically join the ground shields of the group within the cavity.