Modularized Feed Array with Heat Pipes for Satellite Thermal Management
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Solution Overview
Problem
Current satellite antenna technologies face challenges in efficiently implementing large numbers of radiating elements to achieve high throughput and increased data rate capacity, particularly in geosynchronous orbit altitudes, with existing multi-beam antenna systems struggling to optimize beam formation and heat management.
Innovation Solution
The implementation of an active phased array system with interchangeable modules, each containing a large number of radiating elements and amplifiers arranged in a close-packed triangular lattice, coupled with efficient heat management using heat pipes and a laminated honeycomb core panel, to maximize packing efficiency and reduce thermal waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large number of feed elements are implemented to increase data rate capacity, then the throughput and beam coverage are improved, but the thermal management complexity and heat dissipation challenges worsen
Solution Approach 1:
The feed array is divided into multiple interchangeable modules, each containing a subset of feed elements and associated amplifiers. This segmentation allows heat to be distributed across multiple modular units with individual heat management, preventing thermal accumulation in a single location while maintaining the overall large number of radiating elements needed for high data rate capacity.
Solution Approach 2:
Heat pipes are introduced as intermediary thermal management components between the amplifiers and the modular structure. These heat pipes efficiently conduct heat away from the amplifier components without requiring direct thermal contact with the radiating elements, enabling effective heat dissipation while preserving the electrical and functional integrity of the feed elements.
2Productivity
If feed elements are densely packed to maximize aperture utilization, then the antenna efficiency is improved, but the manufacturing and assembly complexity worsen
Solution Approach 1:
The densely packed feed array is segmented into standardized modular units that can be manufactured independently with controlled complexity. Each module contains a manageable number of closely spaced feed elements and associated electronics, allowing for precise manufacturing and testing before final integration into the complete array, thus maintaining high packing efficiency while reducing overall assembly complexity.
Solution Approach 2:
The interchangeable modules are designed with universal interfaces and standardized configurations that can be used throughout the entire feed array. This universality allows the same modular design to be replicated across the aperture, simplifying manufacturing processes and assembly procedures while achieving the desired dense packing for optimal antenna efficiency.
3Loss of energy
If amplifiers are integrated close to radiating elements to reduce losses, then the system efficiency is improved, but the thermal management difficulty worsens
Solution Approach 1:
Each amplifier is integrated within its own modular unit that contains a dedicated heat management system. This segmentation allows the amplifiers to be positioned close to their associated radiating elements for efficient signal transmission while each module independently manages its thermal load through integrated heat pipes and modular heat dissipation paths.
Solution Approach 2:
Heat pipes serve as intermediary thermal conduction elements between the amplifiers and the external thermal management system. This intermediary approach enables close integration of amplifiers with radiating elements for signal efficiency while the heat pipes efficiently transport heat away from the amplifier components without requiring complex direct thermal coupling solutions.
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 configuration enables the formation of a large number of high-efficiency beams with improved thermal management, enhancing the data rate capacity and operational efficiency of satellite communications systems while minimizing thermal dissipation and facilitating modular testing and integration.
Implementation Method 1
The amplifiers may be thermally coupled with the proximal mounting panel and may be mechanically coupled to a back plate by heat pipes
Implementation Method 2
The interchangeable modules may be disposed on a laminated honeycomb core panel
Data Source
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AI summary
A multi-beam antenna (MBA) system for a spacecraft, the MBA system including a reflector and a feed array of radiating feed elements configured as a phased array and illuminating the reflector. The feed array includes a plurality of interchangeable modules. Each of the plurality of interchangeable modules includes a distal mounting panel and a proximal mounting panel, and at least six feed array elements. Each feed array element is electrically coupled with a respective amplifier and mechanically coupled with an exterior surface of the distal mounting panel. The respective amplifiers are thermally coupled with the proximal mounting panel and are mechanically coupled to an interior surface of the distal mounting panel and an exterior surface of the proximal mounting panel. An interior surface of the proximal mounting panel of each interchangeable module is mechanically and thermally coupled with a back plate.