Vehicle Antenna Phase Compensation for Dynamic Satellite Tracking
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Solution Overview
Problem
Vehicle-mounted antennas face communication quality issues when moving, as changes in direction or speed cause shifts in antenna beam azimuth angles, disrupting alignment with low earth orbit satellites.
Innovation Solution
An antenna phase control device with a positioning unit, steering wheel detection, calculation unit, and speed sensor dynamically adjusts the phase of the antenna elements to maintain optimal alignment with satellites, using a control unit to compensate for changes in vehicle movement, incorporating inertial and estimated direction information for precise adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the vehicle-mounted antenna maintains a fixed beam azimuth angle, then the communication system is simple, but the communication quality deteriorates when the vehicle moves, turns, or bumps
Solution Approach 1:
The patent implements dynamic phase adjustment of antenna elements based on real-time vehicle motion detection. The system continuously monitors vehicle acceleration, angular velocity, and steering wheel rotation, then dynamically compensates antenna beam azimuth angles to maintain alignment with LEO satellites during vehicle movement, turning, or bumping
Solution Approach 2:
The system employs feedback control by detecting vehicle motion states through sensors (accelerometer, gyroscope, steering wheel angle sensor) and using this information to adjust antenna phase angles. The control unit receives feedback from motion sensors and steering detection, then calculates and applies compensatory phase adjustments to maintain communication quality
2Reliability
If the antenna beam azimuth angle is adjusted to follow vehicle movement, then communication quality is maintained, but the system complexity increases due to additional sensors and control mechanisms
Solution Approach 1:
The patent introduces intermediate calculation units that process sensor data and compute required phase adjustments. The system uses steering wheel rotation information as an intermediary to estimate vehicle direction changes, and employs calculation units to translate this into appropriate antenna phase compensations, reducing the need for complex direct sensor-to-actuator connections
Solution Approach 2:
The control unit performs multiple functions: it processes data from various sensors (accelerometer, gyroscope, steering wheel sensor), calculates beam azimuth corrections, and controls antenna phase adjusters. This multi-functional approach consolidates complexity into a single control unit rather than requiring separate systems for each function
Data Source
AI summary
An antenna phase control method is applied to an antenna phase control device, the antenna disposed on a moving carrier to communicate with a satellite. The method includes obtaining an initial phase of the antenna, obtaining an instant rotation information of a steering wheel of the moving carrier and speed information of the moving carrier, calculating a compensation phase of the antenna according to the instant rotation information and the speed information, and adjusting the initial phase of the antenna according to the compensation phase. The present disclosure also provides an antenna phase control device. The present disclosure can calculate the antenna phase according to the direction information and the speed information of the moving carrier, so as to dynamically adjust the radiation direction of the antenna.