PCB Connector Shielding With Ground Pads for RF Noise Mitigation

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Solution Overview

Problem

Removable modules for computing devices generate noisy radio-frequency (RF) emissions due to unshielded connectors, which interfere with high-speed communication protocols like Wi-Fi and LTE.

Innovation Solution

Implementing a connector shielding system with ground pads and contact pins to reduce RF noise by grounding the connector plane and receptacle, using ground pads between contact pads and connecting them to a ground terminal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If connectors are made removable to enable module expansion, then adaptability and upgradability are improved, but RF noise emissions increase due to unshielded connections

Engineering Contradiction:

Improvemodule expandabilityVSAvoidRF noise emissions

Core Design Contradiction:

Adaptability or versatilityVSObject-generated harmful factors

Solution Approach 1:

A ground pad is introduced as an intermediary element between the connector plane and the receptacle. This ground pad acts as a mediator that provides RF shielding by creating a grounded barrier, thereby reducing RF noise emissions while maintaining the removable connector configuration for module expandability

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-generated harmful factors

If ground pads are added to shield connectors, then RF noise is reduced, but device complexity increases

Engineering Contradiction:

ImproveRF noise emissionsVSAvoidconnector structure

Core Design Contradiction:

Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

RF shielding is applied locally only at the connector interface where it is most needed, rather than shielding the entire device. The ground pad is strategically positioned between the connector plane and receptacle to provide targeted RF noise reduction, minimizing the impact on overall device complexity

Inventive Principle:

Principle #3Local quality

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

Effectively mitigates RF noise from removable modules, ensuring reliable high-speed communication capabilities in computing devices.

Implementation Method 1

one or more ground pads configured to be connected to the one or more contact pins of the receptacle... connected to a ground terminal of the PCB

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentEP3776746B1Connector shielding

Publication Date: 2026.03.04 MICROSOFT TECHNOLOGY LICENSING LLC

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AI summary

The described technology provides a removable apparatus comprising a printed circuit board (PCB) including a plurality of electrical components, a plurality of contact pads configured on at least one of a top surface of a connector plane and a bottom surface of a connector plane to connect the electrical components to one or more contact pins of a receptacle, and one or more ground pads configured to be connected to the one or more contact pins of the receptacle, wherein the one or more ground pads are placed in between the PCB and the plurality of contact pads and connected to a ground terminal of the PCB.