ESA Tile Sequencing for Thermal Load Balancing
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Solution Overview
Problem
Antenna systems on commercial passenger vehicles face thermal challenges due to high power consumption and heat generation, leading to potential damage and reduced communication capabilities, especially in hot ambient environments.
Innovation Solution
Implementing a thermal load balancing method for electronically steerable antennas (ESAs) by optimizing the sequence of activated antenna elements or tiles, minimizing shared tiles between consecutive patterns to maximize cooling time and reduce thermal stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all antenna tiles are activated to maintain communication with moving satellites, then communication capability is improved, but thermal load increases causing tiles to reach shutdown temperatures
Solution Approach 1:
The antenna array is divided into multiple independent tiles that can be selectively activated. Instead of operating all tiles simultaneously, the system segments the antenna functionality across multiple tiles and activates only the necessary subset for each communication task, allowing other tiles to cool down and preventing thermal overload.
Solution Approach 2:
The system implements periodic switching between different tile configurations. Tiles are activated in sequences with periodic intervals, allowing them to alternate between active and cooling states. This periodic activation pattern ensures that no single tile remains continuously hot, maintaining communication capability while managing thermal load.
2Temperature
If a subset of antenna tiles is activated to reduce thermal load, then temperature control is improved, but communication capability may be degraded
Solution Approach 1:
The system dynamically adjusts which tiles are activated based on real-time thermal conditions and communication requirements. The tile activation pattern is not static but adapts continuously, switching between different subsets of tiles to optimize both thermal management and communication performance according to current operational needs.
Solution Approach 2:
The system changes operational parameters by varying the number and configuration of active tiles. Instead of maintaining a fixed activation pattern, the system modifies tile activation parameters dynamically, adjusting the subset of active tiles to balance thermal load distribution while preserving sufficient communication capability for satellite connectivity.
3Productivity
If the same antenna tiles are reused consecutively for communication patterns, then operational efficiency is improved, but thermal stress accumulates reducing component lifespan
Solution Approach 1:
The system temporarily discards certain tiles from active duty after they have been used, allowing them to cool down and recover. Tiles that were recently activated are temporarily removed from the active pool, and other tiles are brought into service. This rotation ensures that individual tiles have recovery periods, preventing thermal stress accumulation while maintaining overall system productivity.
Data Source
AI summary
Example embodiments disclosed herein relate to optimizing operation of an electronically steerable antenna (ESA) with respect to temperature-related constraints. Thermal load experienced by individual antenna elements or tiles of the ESA is balanced to maximize an expected time before the ESA reaches a shutdown temperature. An example method includes determining a reduced number of antenna tiles that minimally satisfies a signal quality requirement with respect to a target system. The method further includes selecting an optimized sequence of tile patterns of the reduced number of antenna tiles within the ESA. The optimized sequence corresponds to an optimized path that traverses a graph having nodes corresponding to the tile patterns and edges defining a count of shared tiles between respective tile patterns. The method further includes operating the ESA according to the optimized sequence of tile patterns based on activating specific tiles identified by each pattern in a sequential manner.