Thermal Protection Antenna Integration With RF-Transparent Waveguides
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Solution Overview
Problem
Existing thermal protection systems (TPS) for vehicles are opaque to radio frequencies, limiting antenna placement options and complicating antenna design, especially for hypersonic vehicles, and traditional materials engineering solutions are difficult to implement.
Innovation Solution
A thermal protection system integrated antenna (TPSIA) that integrates a wave guide and coupling structure with the TPS, allowing RF energy to be coupled into the wave guide via a coupling structure, with a portion of the TPS replaced by filler material to create a phased array with active or passive steering, and internal signal routing within the TPS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional opaque TPS materials are used, then thermal protection is achieved, but antenna placement options are limited and RF transparency is lost
Solution Approach 1:
The TPS is segmented into multiple functional zones: opaque TPS material for thermal protection, RF-transparent filler material for antenna integration, and waveguide structures for signal transmission. This segmentation allows each zone to perform its specific function without compromising the others.
Solution Approach 2:
The TPS structure transitions from uniform opacity to having localized RF-transparent regions where antennas are integrated. The filler material creates specific zones with different electromagnetic properties while maintaining overall thermal protection through the surrounding opaque TPS material.
2Adaptability or versatility
If RF-transparent materials are used for antenna windows, then antenna placement flexibility improves, but thermal protection capability deteriorates
Solution Approach 1:
The invention merges the thermal protection function and RF transmission function into a single integrated structure. The TPSIA combines opaque TPS material for thermal protection with RF-transparent filler material and waveguide structures, eliminating the need for separate antenna windows while maintaining both thermal protection and antenna placement flexibility.
Solution Approach 2:
The TPSIA structure serves multiple functions simultaneously: it provides thermal protection like traditional TPS, enables RF transmission for antenna operation, and offers structural integration for various antenna types. This multi-functionality resolves the trade-off between thermal protection and antenna placement flexibility.
3Reliability
If antenna windows are made large for standard antenna designs, then antenna performance improves, but TPS structural integrity and volume efficiency deteriorate
Solution Approach 1:
The invention transitions from a two-dimensional antenna window approach to a three-dimensional waveguide-integrated structure. Signals are routed through internal waveguide paths within the TPS rather than requiring large surface apertures, enabling efficient antenna integration with minimal impact on TPS volume and structural integrity.
4Ease of manufacture
If materials are engineered to have favorable RF properties, then antenna design becomes easier, but manufacturing complexity and difficulty increase
Solution Approach 1:
The invention uses porous filler material with controlled properties to create RF-transparent regions within the TPS. This porous structure allows RF energy transmission while maintaining the ability to be integrated into existing TPS manufacturing processes, avoiding the need for complex new material development.
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 TPSIA eliminates the need for large antenna windows, reduces volume requirements, enhances survivability, and allows dynamic adjustment to environmental conditions, improving thermal shielding and antenna integration.
Implementation Method 1
A wave guide is formed in the thermal protection system
Implementation Method 2
The radio frequency energy is coupled into the wave guide via the coupling structure
Implementation Method 3
A plurality of wave guides forms a phased array in the platform skin with either active or passive steering or a fixed beam
Data Source
AI summary
A thermal protection system integrated antenna providing a thermal protection system, a wave guide formed in the thermal protection system, and a coupling structure, wherein the coupling structure is connected to an antenna and feed structure. The thermal protection system is mounted on a platform skin of a vehicle and a portion of the thermal protection system is removed and replaced with filler material which has radio frequency transparency. A plurality of wave guides forms a phased array in the platform skin with either active or passive steering or a fixed beam. An internal waveguide path is constructed to route signals internally within the thermal protection system and through one or more apertures in a surface of the thermal protection system. The survivability of the overall antenna system is improved by the improved thermal shielding.