Coaxial Connector Grounding Insert for Torque-Independent Signal Integrity

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Solution Overview

Problem

F-connector installations often suffer from improper tightening, leading to compromised electrical grounding and signal quality issues due to inadequate torque settings, resulting in intermittent connections and signal loss in high-bandwidth satellite and cable television systems.

Innovation Solution

The design incorporates internal grounding inserts, such as a circular band or tubular band with radially spaced spring clips, that establish a redundant grounding path between the nut, post, and coaxial cable, ensuring electrical contact regardless of the torque applied during installation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If F-connector installations rely on proper torque settings during tightening, then electrical grounding quality improves, but installation complexity and operator skill requirements increase

Engineering Contradiction:

Improveelectrical grounding qualityVSAvoidinstallation simplicity

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The grounding insert is designed to automatically establish reliable electrical contact between the cable shield and connector body through its own elastic deformation, without requiring the installer to apply specific torque. The spring clips self-adjust to contact the post and nut interior surfaces, making the grounding function independent of installation skill level.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The grounding insert changes its physical state from a relaxed configuration to a compressed state during installation. This parameter change (deformation) enables the elastic material to maintain constant contact pressure with the post and nut, ensuring reliable grounding regardless of the torque applied during installation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If F-connectors are tightened with adequate torque, then electrical connection reliability improves, but risk of damage to cable or connector increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidcable and connector integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The grounding insert acts as an intermediary element between the cable shield and the connector body. It absorbs the mechanical stress of tightening through its elastic properties, preventing direct transmission of excessive force to the cable and connector components while maintaining electrical contact.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The elastic material of the grounding insert provides beforehand cushioning by deforming under compression during installation. This pre-compression absorbs potential damage forces before they can reach critical components, protecting the cable and connector from damage while ensuring grounding reliability.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If grounding paths depend on proper torque application, then installation speed decreases, but grounding reliability improves

Engineering Contradiction:

Improvegrounding path reliabilityVSAvoidinstallation speed

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The grounding insert performs the grounding function automatically through its elastic deformation during normal installation, eliminating the need for installers to monitor or control torque settings. This self-service mechanism maintains grounding reliability while significantly increasing installation speed.

Inventive Principle:

Principle #25Self-service

4Device complexity

If F-connectors use simple threading without additional grounding components, then device complexity decreases, but grounding reliability under varying torque conditions worsens

Engineering Contradiction:

Improveconnector structure complexityVSAvoidgrounding consistency

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The grounding function is segmented from the main connector body into a separate insert component. This segmentation allows the grounding function to be optimized independently with elastic material properties, ensuring reliable grounding without complicating the overall connector structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The grounding insert serves as an intermediary component that bridges the cable shield and connector body. This additional element, while increasing component count, actually simplifies the grounding mechanism by providing a dedicated elastic contact path that works independently of the threading mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 provides reliable electrical connections, maintains signal integrity, and minimizes resistive losses in coaxial cable junctions, even when the required torque settings are not met, ensuring consistent performance in high-bandwidth systems and extreme conditions.

Implementation Method 1

a continuously curved springform insert having a wall defining inner and outer surfaces; providing plural tabs extending from the insert inner surface toward an insert axis of revolution; the insert tabs engaging a periphery of the post; and, the insert outer surface engaging an interior of the nut

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10170847B2Coaxial connector grounding inserts

Publication Date: 2019.01.01 PERFECTVISION MFG

AI summary

A coaxial cable connector with a grounding insert that is between a fastener and and a post to provide electrical continuity therebetween.