Adaptive Antenna Tracking for UAVs
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Solution Overview
Problem
Maintaining reliable and cost-effective wireless communication links between aerial vehicles and ground stations is challenging due to the dynamic movement of aerial vehicles, which often requires complex and heavy mechanical gimbal systems for antenna tracking, limiting their use in low-cost and high-throughput applications.
Innovation Solution
An adaptive antenna system that combines electrical beamforming and mechanical movement to track aerial vehicles, allowing for concurrent multiple communication links with multiple ground stations, using a combination of antenna arrays, switches, and inertial measurement units to adjust antenna beams dynamically, reducing the need for complex mechanical gimbals and enabling efficient tracking across a 360-degree range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical gimbal systems are used for antenna tracking, then tracking reliability is improved, but device complexity and weight increase
Solution Approach 1:
The patent replaces complex mechanical gimbal systems with an electro-mechanical hybrid system. Electrical beamforming techniques are used to electronically steer antenna beams, while a simplified mechanical system provides only coarse positioning. This substitution eliminates the need for complex mechanical gimbals while maintaining tracking reliability through the combination of electrical and mechanical tracking methods.
Solution Approach 2:
The patent divides the tracking function into two separate subsystems: an electrical beamforming system that handles fine tracking adjustments, and a simplified mechanical system that provides coarse positioning. This segmentation allows each subsystem to perform its specialized function efficiently, reducing overall system complexity while maintaining reliable tracking.
2Measurement precision
If mechanical gimbal systems are used for antenna tracking, then tracking accuracy is improved, but weight increases
Solution Approach 1:
The patent replaces heavy mechanical gimbal systems with an electro-mechanical hybrid approach. Electrical beamforming provides precise beam steering without mechanical movement, while a lightweight mechanical system provides only coarse positioning. This substitution dramatically reduces antenna system weight while maintaining tracking accuracy through the complementary actions of both subsystems.
3Device complexity
If electrical beamforming is used for tracking, then device complexity is reduced, but tracking range is limited
Solution Approach 1:
The patent merges electrical beamforming and mechanical tracking systems into a unified electro-mechanical hybrid system. The mechanical system provides broad coverage and coarse positioning, while electrical beamforming provides precise beam steering within each mechanical position. This combination achieves full 360-degree tracking range while keeping individual subsystems relatively simple.
Solution Approach 2:
The patent segments the tracking range into multiple sectors, with the mechanical system providing coarse positioning to different sectors and electrical beamforming providing fine tracking within each sector. This segmentation allows the electrical beamforming system to maintain simplicity while the mechanical system expands the overall tracking range through multi-sector coverage.
4Productivity
If concurrent multiple communication links are supported, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal antenna system that can simultaneously support multiple communication links with different ground stations. The electro-mechanical hybrid system with multi-sector mechanical positioning and electrical beamforming capability allows the same antenna system to serve multiple functions and multiple users concurrently, improving productivity without requiring separate dedicated systems for each link.
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 provides reliable and low-cost communication links with reduced weight and power consumption, enabling efficient Internet connectivity in remote areas or during temporary bandwidth demands, such as natural disasters or special events, by using a combination of mechanical and electrical tracking methods to maintain signal quality.
Implementation Method 1
an electrical subsystem that performs antenna beamforming to steer the antenna beam in a direction of a transmitter
Implementation Method 2
a mechanical system that rotates an antenna array about a rotation axis to track a transmitter
Data Source
AI summary
A combined electro-mechanical adaptive antenna tracking system for wireless communication between transmitters and receivers moving relative to each other is described. This system enables one or more antenna transceivers on a moving object, such as a high altitude unmanned aerial vehicle (HALE UAV), to simultaneously track one or more separate antenna transceivers on the ground, such as multiple customer premises equipment. The antennas on the moving object are constructed with multiple-subsection phased arrays or may have multiple horns on one rotation axis. Adaptive tracking control logic is applied to synchronize electrical switch and/or mechanical rotation and electrical beamforming for the moving transceivers to track multiple ground transceivers. In one advantageous aspect, an off-the-shelf horn antenna can be used and rotated around only one axis, thereby eliminating the need for expensive two dimensional movement actuators such as gimbals and the need for tracking multiple ground based receivers.