Phased Array Antenna Multiplexing for Multi-Satellite Links
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Solution Overview
Problem
Current satellite communication antenna systems face limitations in size, weight, power, cost, and reliability (SWaP-C+R), which restrict their applications, especially for moving platforms that need to maintain connectivity with multiple satellites and require efficient beam steering without significant scan loss or physical size increases.
Innovation Solution
The system employs multiple electronically steerable antennas (ESAs) with variable dielectric phase shifters for real-time configuration and dynamic signal combination, allowing for optimal antenna selection based on signal strength and movement, along with a controller to manage connections and modems for secure and efficient data transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If Electronically Steerable Arrays (ESAs) are used to avoid moving parts and reduce size, then reliability improves and physical size decreases, but power consumption increases significantly
Solution Approach 1:
The system divides the antenna functionality into multiple independent ESAs, each handling specific satellite connections. This segmentation allows the system to activate only the necessary antenna elements for current operational needs, reducing overall power consumption while maintaining reliability through distributed architecture
Solution Approach 2:
The system dynamically switches between different ESA configurations and activates/deactivates antenna elements based on real-time communication requirements. This dynamic operation reduces power consumption by avoiding continuous operation of all antenna elements, while maintaining reliability through rapid reconfiguration capabilities
2Adaptability or versatility
If ESAs tilt the beam electronically to maintain connection, then adaptability improves, but aperture size decreases causing scan loss
Solution Approach 1:
The system uses multiple ESAs positioned at different spatial locations and orientations rather than tilting a single antenna. This dimensional approach allows each ESA to maintain a larger effective aperture while the system as a whole achieves the necessary adaptability through spatial diversity and beam forming across multiple antenna elements
Solution Approach 2:
The system combines signals from multiple ESAs using beam forming techniques to create a composite signal that maintains high gain and effective aperture size. By merging the capabilities of multiple antennas, the system achieves both adaptability for tracking moving satellites and large effective aperture to minimize scan loss
3Adaptability or versatility
If multiple ESAs are deployed to maintain connection with moving platforms, then adaptability improves, but device complexity increases
Solution Approach 1:
Each ESA in the system is designed with universal functionality to handle multiple satellite connections and communication modes. This multi-functionality reduces overall system complexity by avoiding the need for specialized antennas for different purposes, while maintaining high adaptability through software-defined radio capabilities and reconfigurable beam forming
Solution Approach 2:
The system implements real-time feedback mechanisms that monitor satellite positions, signal quality, and antenna performance. This feedback enables automated switching and beam steering algorithms that reduce operational complexity by making adaptive decisions without manual intervention, while maintaining high adaptability to changing communication conditions
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 solution enables continuous communication with multiple satellites, reduces power consumption, and enhances reliability by dynamically adjusting antenna configurations and modem usage, ensuring high data rates and security through real-time path optimization and secure data distribution across multiple paths.
Implementation Method 1
each having a plurality of phase shifters, each phase shifter introducing delay to an RF signal propagating therethrough
Data Source
AI summary
A system having a platform upon which several phased antenna arrays are mounted and which can communicate with satellites. The system includes a switch that can connect any of the phased array antennas to any of available modems. The system further includes a router that can connect any of the modems to any available computing devices. Based on parameters such as data rates, signal strength, and account information, one or more communication paths are selected for a computing device requesting to communicate with a satellite. Each communication path is established by operating the switch to connect a selected antenna to a selected modem, and operating the router to transfer data between the computing device and the selected modem.