Planar Grounding Device for PCB EMI Isolation
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Solution Overview
Problem
The increasing density of electrical connectors on printed circuit boards leads to unacceptable electromagnetic interference (EMI) between coaxial conductors, causing signal corruption due to the proximity of ports, and existing solutions like ganged connectors are limited by the number of ports they can accommodate.
Innovation Solution
A device with a planar body and conductive contact portions, made of materials like aluminum or beryllium copper, is mounted on a printed circuit board and engages with a ganged connector, featuring a design that prevents air pockets and uses tapered bosses to establish electrical communication, reducing EMI between ports through deformation of the contact portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the density of electrical connectors on a printed circuit board is increased to accommodate more signals, then the number of ports per unit space increases, but electromagnetic interference and cross-talk between adjacent ports becomes unacceptable
Solution Approach 1:
The patent introduces an intermediary shielding structure positioned between adjacent coaxial connectors on the printed circuit board. This shielding element acts as a mediator that blocks electromagnetic fields from one connector from interfering with adjacent connectors, thereby enabling higher connector density without unacceptable cross-talk or leakage.
Solution Approach 2:
The patent applies localized shielding only in the specific regions where electromagnetic interference occurs between adjacent connectors, rather than shielding the entire board uniformly. This allows selective protection of vulnerable areas while maintaining overall signal integrity and minimizing the impact on connector placement flexibility.
2Object-affected harmful factors
If traditional ganged connectors are used to reduce EMI, then electromagnetic radiation leakage is reduced, but the number of ports is limited by the connector's predefined capacity
Solution Approach 1:
The patent divides the shielding function into separate, modular elements that can be independently positioned between individual connectors or groups of connectors. This segmentation allows the shielding structure to be adapted to various connector configurations and densities, providing EMI protection without limiting the number of ports that can be accommodated on the board.
Solution Approach 2:
The patent designs a universal shielding structure that can be applied across multiple connector types and configurations. The modular shielding elements can be arranged to protect different numbers and patterns of connectors, making the solution adaptable to various port densities and connector arrangements without requiring custom designs for each configuration.
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 solution effectively minimizes electromagnetic radiation leakage between ports of a ganged electrical connector connected to a printed circuit board, ensuring signal integrity by maintaining electrical communication and allowing for multiple connections without signal corruption.
Implementation Method 1
allowing for multiple connections without signal corruption
Data Source
AI summary
The device includes a body and a plurality of contact portions. The body is substantially planar. The plurality of contact portions are associated with the body so as to form ports. The plurality of contact portions are in electrical communication with the body. The port of each contact portion having an inside diameter substantially equal to ID1. The body and the contact portions are constructed of a conductive metallic material.