High-Temperature RF Wire Assembly With Fixed Wire Separation
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Solution Overview
Problem
Existing wireless radio communication systems in buildings fail during structural fires due to the inability of RF cables and antennas to withstand high temperatures, disrupting communication between emergency personnel and posing a risk to public safety.
Innovation Solution
A dual wire assembly system using copper, steel, or metallic alloy wires with low coefficient of expansion materials like silica cement and furnace concrete for separation nodes, along with high-temperature resistant components such as copper coated steel antennas and RF interface equipment embedded in silica cement, to maintain impedance and ensure reliable signal transmission under extreme heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing RF cables and antennas are used, then they can carry high frequency signals, but they cannot withstand intense temperatures and lose their ability to transport and radiate the radio frequency signal
Solution Approach 1:
The patent employs composite materials throughout the RF system architecture. The dual-wire cable assembly uses copper or copper-coated steel wires separated by fire-resistant materials (aerogel, silica aerogel, or other high-temperature insulators). The antenna elements are constructed from fire-resistant materials such as ceramic, glass, or metal alloys. The connector housing and antenna support structures utilize high-temperature polymers, ceramics, or metal composites. This multi-material composite approach enables the system to simultaneously maintain signal transmission capability and temperature resistance, resolving the contradiction between these two reliability requirements.
2Reliability
If existing RF cables are used, then they can withstand roughly two hours of 1850° F. temperatures, but they cannot carry the high frequency signals required of modern wireless radio communications systems
Solution Approach 1:
The patent employs composite materials throughout the RF system architecture. The dual-wire cable assembly uses copper or copper-coated steel wires separated by fire-resistant materials (aerogel, silica aerogel, or other high-temperature insulators). The antenna elements are constructed from fire-resistant materials such as ceramic, glass, or metal alloys. The connector housing and antenna support structures utilize high-temperature polymers, ceramics, or metal composites. This multi-material composite approach enables the system to simultaneously maintain signal transmission capability and temperature resistance, resolving the contradiction between these two reliability requirements.
Solution Approach 2:
The patent applies local quality by differentiating material properties at different locations within the system. The conductor wires use highly conductive materials (copper, copper-coated steel) optimized for signal transmission, while the separation elements and protective structures use fire-resistant materials (aerogel, ceramics, high-temperature polymers) optimized for thermal protection. This spatial differentiation of material qualities allows each component to excel at its primary function while contributing to overall system performance in both signal transmission and temperature resistance.
3Reliability
If existing configurations are used, then a cable or wire may be capable of withstanding high temperatures, but the connectors and antenna are not capable of withstanding high temperatures
Solution Approach 1:
The patent applies universality by designing the fire-resistant properties as a system-wide characteristic rather than a component-specific feature. All major components (cables, connectors, antennas, support structures) are selected and designed to withstand high temperatures, creating a universally temperature-resistant system. The connector housing, antenna elements, and mounting structures all utilize high-temperature materials, ensuring that no single component becomes a weak link in the temperature resistance chain.
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 system enables continuous communication during fires by maintaining wire separation and impedance, ensuring that radio frequency signals can be transmitted effectively even at temperatures up to 1850°F, thus supporting life-saving activities by first responders.
Implementation Method 1
The at least one separator node can be formed from at least one of furnace concrete, low coefficient of expansion glass, or silica cement. As used in this context, the term 'low coefficient of expansion' with respect to a glass material means a material that has a low expansion and contraction response over a wide temperature range.
Implementation Method 2
The at least one separator node can be formed from at least one of furnace concrete, low coefficient of expansion glass, or silica cement. The glass material can withstand high temperatures.
Implementation Method 3
The antenna can be formed from copper coated steel
Implementation Method 4
The dual wire assembly can be configured to transmit radio frequency signals
Data Source
AI summary
A wire assembly and antenna that is configured to transmit and receive radio frequency signals and can withstand high temperatures is disclosed. The wire assembly includes a first and second wire formed from copper, steel, copper coated steel, or metallic alloy, and the wires are spaced apart from each other by a predetermined distance. This predetermined distance is maintained via applying tension to the wires and/or using separator nodes or other spacing elements. Various components of the system disclosed herein are formed from fire proof or fire resistant materials, such that the components will not fail or be compromised under extreme heat and flames.