Aerothermal Ring Structures for RF Isolation and Heat Dissipation
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Solution Overview
Problem
Designing heat dissipation structures for aerodynamic systems like guided projectiles is challenging due to the need to balance heat mitigation with aerodynamics and RF signal transmission/reception, as traditional methods often adversely affect RF performance and aerodynamics.
Innovation Solution
The use of a heat dissipation structure formed within a metallic body with recessed annular rings that extend circumferentially around heat-generating components, with varying spacings to optimize both heat dissipation and RF isolation between transmitter and receiver circuits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional heat dissipation structures are used, then heat mitigation is improved, but RF signal transmission and reception deteriorates
Solution Approach 1:
The heat dissipation structure is segmented into multiple annular rings with varying spacings between them. This segmentation creates RF isolation zones between adjacent rings that block RF signals while the overall structure maintains heat dissipation functionality through increased surface area
Solution Approach 2:
Different regions of the heat dissipation structure have different local properties - the annular rings are positioned and spaced to create RF isolation in specific zones while maintaining thermal conduction pathways. The varying spacing between rings creates localized RF blocking effects without compromising overall heat dissipation
2Temperature
If heat dissipation structures are added, then temperature control is improved, but aerodynamic performance deteriorates
Solution Approach 1:
The heat dissipation structure uses annular rings with curved surfaces that follow the aerodynamic contour of the projectile body. This curvature reduces aerodynamic disruption compared to flat or angular heat sinks, allowing the structure to integrate smoothly with the aerodynamic flow
3Reliability
If RF isolation is increased, then RF cross-talk is reduced, but heat dissipation efficiency deteriorates
Solution Approach 1:
The RF isolation is achieved by adding a circumferential dimension to the heat dissipation structure - annular rings arranged around the body perimeter. This creates RF isolation in the circumferential direction while maintaining thermal conduction pathways along the axial direction through the annular structure's connection to the heat-generating components
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 approach effectively mitigates heat while maintaining aerodynamic performance and reducing RF cross-talk, providing improved RF isolation and heat transfer efficiency.
Implementation Method 1
Heat dissipation structures may be used to provide increased surface area and facilitate dissipation of excess heat
Implementation Method 2
Heat sink structures may be used to provide increased surface area and facilitate dissipation of excess heat
Implementation Method 3
The plurality of ring structures are located between the first location and the second location along a length of the body... reducing RF cross-talk
Data Source
AI summary
A heat dissipation structure is disclosed that is especially well-suited for use on aerodynamic systems. The heat dissipation structure is formed within a metallic body that surrounds the heat-generating electronics. The heat dissipation structure is designed to both dissipate the generated heat and also to isolate RF cross-talk between the one or more transmitters and receivers. The heat dissipation structure includes a plurality of ring structures that extend around at least a portion of a body that houses the one or more heat-generating electrical components. The plurality of ring structures may be recessed into the body, and a first spacing between a first adjacent pair of ring structures of the plurality of ring structures is different from a second spacing between a second adjacent pair of ring structures of the plurality of ring structures.