Optical Transceiver Multi-Sub-Aperture Gimbal-Free Design
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Solution Overview
Problem
Current radio frequency (RF) communication systems for Low Earth Orbit (LEO) small satellites have limitations in data rates and data capacity due to frequency range and mechanical constraints, particularly requiring large antennas that are impractical for space and weight-constrained applications like aircraft and UAVs, necessitating the use of mechanical gimbals for signal capture and transmission.
Innovation Solution
The development of an optical communications transceiver with multiple sub-apertures that allow signal transmission and reception over various angles without physical orientation adjustments, enabling compact, gimbal-free designs suitable for aircraft and UAVs, and incorporating features like wavelength-division multiplexing, phase modulation, and polarization diversity to enhance data capacity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If RF communication systems use large antennas for high data rates, then data capacity is improved, but weight and space requirements increase making them impractical for aircraft and UAVs
Solution Approach 1:
The patent replaces mechanical RF antenna systems with optical communication systems using lasers and telescopes. This substitution eliminates the need for large mechanical RF antennas while achieving higher data rates through optical frequency transmission, directly resolving the contradiction between data rate and weight/space requirements for mobile platforms.
2Adaptability or versatility
If RF systems use mechanical gimbals for signal capture over various angles, then field of view coverage is improved, but device complexity and mechanical constraints increase
Solution Approach 1:
The patent divides a single large antenna aperture into multiple smaller sub-apertures arranged in an array. Each sub-aperture can independently receive signals from different angles, providing wide field of view coverage without requiring mechanical gimbal systems. This segmentation eliminates complex mechanical components while maintaining angular adaptability.
Solution Approach 2:
The patent replaces mechanical gimbal systems with a fixed multi-sub-aperture optical array. The optical system achieves angular coverage through the geometric arrangement of sub-apertures rather than mechanical movement, eliminating gimbals and associated complexity while maintaining versatility in signal capture from various angles.
3Adaptability or versatility
If optical communication systems use multiple sub-apertures for wide angle coverage, then field of view is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sub-aperture signals through coherent integration and signal processing techniques. By merging the outputs of individual sub-apertures with appropriate phase and amplitude weighting, the system achieves wide effective field of view coverage while managing device complexity through unified signal processing architecture rather than separate systems for each sub-aperture.
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 high-data-rate optical communication systems that overcome the limitations of RF systems, providing secure, efficient, and flexible data transmission capabilities for space and power-constrained environments, including satellite-to-ground and UAV communications, with increased data capacity and reduced mechanical complexity.
Implementation Method 1
an optical communications transceiver configured for free space communication between a satellite and a ground station or a moving object
Implementation Method 2
multiple sub-apertures for receiving or transmitting signal over a plurality of angles
Implementation Method 3
incorporating features like wavelength-division multiplexing, phase modulation, and polarization diversity to enhance data capacity and efficiency
Implementation Method 4
incorporating features like wavelength-division multiplexing, phase modulation, and polarization diversity to enhance data capacity and efficiency
Implementation Method 5
incorporating features like wavelength-division multiplexing, phase modulation, and polarization diversity to enhance data capacity and efficiency
Data Source
AI summary
An optical communications transceiver, for use in free space communication between a satellite and a ground station, includes multiple sub-apertures for receiving signal over a plurality of angles, wherein the sub-apertures are fixed. In an embodiment, the transceiver is further configured for transmitting signal over the plurality of angles without physically moving the transceiver to those angles.