Guarded Coaxial Cable for Window Gaps

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Solution Overview

Problem

Coaxial cables used for television and satellite signals face challenges when passing through narrow spaces between windows and doors, including deformation, signal loss, and inability to maintain impedance, leading to signal bottlenecks and data delays.

Innovation Solution

A guarded coaxial cable assembly featuring a micro-coaxial cable and a rail or plate structure embedded in a flexible jacket, designed to reduce deformation and maintain signal quality by distributing transverse loads, allowing the cable to bend around obstructions and maintain RF performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a 7 mm coaxial cable is used to transmit RF signals, then signal transmission capability is improved, but the cable cannot pass through narrow window/door gaps and is damaged by compression

Engineering Contradiction:

Improvesignal transmission capabilityVSAvoidability to pass through narrow spaces

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The cable system is segmented into two parts: a flexible extension cable (3-4 mm diameter) that passes through the narrow window/door gap, and a larger 7 mm coaxial cable that provides robust signal transmission. The extension cable connects to the main cable via connectors, allowing each segment to fulfill its specific function without compromise

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The extension cable with connectors is essentially nested within the larger cable system. The F-connectors on the extension cable interface with the 7 mm coaxial cable, creating a nested configuration where the smaller flexible cable fits through the gap while the larger cable provides the primary transmission path

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If a 7 mm coaxial cable is passed through the window/door gap, then signal transmission is enabled, but the cable is deformed by window/door operation and RF performance degrades

Engineering Contradiction:

Improvesignal transmissionVSAvoidcable geometry stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The extension cable uses a flexible jacket and soft covering that can accommodate the narrow gap and repeated compression from window/door operation. This flexible construction allows the cable to bend and deform elastically without permanent damage, maintaining its ability to transmit signals reliably

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The soft covering and flexible jacket act as a cushioning layer that protects the internal conductors and dielectric from the harsh mechanical environment. This pre-applied protection prevents damage before it can occur to the critical signal-carrying components

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Strength

If armor is added to protect the cable, then mechanical strength is improved, but the cable cannot make sharp bends and bending radius increases

Engineering Contradiction:

Improvemechanical protectionVSAvoidbending capability

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The cable system segments the functions of protection and flexibility. The flexible extension cable without armor provides the necessary bending capability to navigate the window/door gap, while the armored 7 mm coaxial cable provides robust mechanical protection for the main transmission line where bending is not required

Inventive Principle:

Principle #1Segmentation

4Ease of operation

If the cable is flattened to reduce diameter, then the cable can pass through narrow gaps, but RF performance is impaired

Engineering Contradiction:

Improveability to pass through gapsVSAvoidRF performance

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

Instead of flattening the main 7 mm coaxial cable and accepting degraded RF performance, the solution inverts the approach by using a small-diameter flexible extension cable for the gap passage and reserving the properly constructed 7 mm cable for maintaining optimal RF characteristics in the main transmission path

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS9053837B2Protected coaxial cable

Publication Date: 2015.06.09 HOLLAND ELECTRONICS LLC

AI summary

A guarded coaxial cable assembly includes a micro-coaxial cable and an adjacent structure for protecting the micro-coaxial cable.