Vehicle Antenna Phase Control for LEO Beam Alignment
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Solution Overview
Problem
Vehicle-mounted antennas experience communication quality degradation due to instantaneous shifts in antenna beam azimuth angles caused by vehicle movement, such as turning, going up or down, or bumping road surfaces, when communicating with low earth orbit (LEO) satellites.
Innovation Solution
An antenna phase control device that includes a positioning unit, navigation unit, calculation unit, and control unit to dynamically adjust the phase of the antenna elements based on real-time location, destination information, and movement data to maintain optimal signal radiation direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the vehicle-mounted antenna maintains a fixed beam azimuth angle, then the communication system structure is simple, but the communication quality degrades when the vehicle moves, turns, or encounters road surface changes
Solution Approach 1:
The patent implements dynamic phase adjustment of the phased array antenna elements based on real-time vehicle movement detection. The system transitions from a static fixed beam configuration to a dynamic configuration that continuously adapts to vehicle motion, maintaining optimal communication alignment with LEO satellites despite vehicle movement, turning, or road surface changes.
Solution Approach 2:
The patent employs a feedback mechanism where the actual position and attitude information of the vehicle is continuously monitored and fed back to the phase calculation unit. This feedback loop enables the system to detect deviations from the optimal beam direction and automatically adjust the antenna phase to compensate for vehicle movement, thereby maintaining communication quality.
2Reliability
If the antenna phase is dynamically adjusted to maintain communication quality during vehicle movement, then communication reliability improves, but the device complexity increases due to additional positioning, navigation, and control units
Solution Approach 1:
The patent integrates multiple functions into a unified antenna phase control system. The phase control device simultaneously performs positioning, navigation information processing, phase calculation, and antenna control, allowing a single system to handle multiple tasks that would otherwise require separate dedicated systems, thereby reducing overall device complexity.
Solution Approach 2:
The patent combines the positioning unit, navigation unit, calculation unit, and control unit into an integrated antenna phase control device. By merging these previously separate functional components into a single coordinated system, the patent reduces the overall system complexity while maintaining the capability to dynamically adjust antenna phase for communication quality maintenance.
3Device complexity
If the beam azimuth angle is kept constant to simplify the control system, then the device complexity is low, but the antenna beam cannot track the satellite during vehicle movement causing communication degradation
Solution Approach 1:
The patent transforms the static fixed beam azimuth configuration into a dynamic system that continuously adjusts the antenna phase based on real-time vehicle movement. This dynamic adjustment enables the beam to track the satellite's position relative to the moving vehicle, providing adaptability to various vehicle motions while maintaining a relatively simple control architecture.
Data Source
AI summary
An antenna phase control method is applied to an antenna phase control device and an antenna, the antenna disposed on a moving carrier. The method includes obtaining a location information of the moving carrier; obtaining a destination information of the moving carrier and generating a navigation information according to the location information and the destination information; calculating at least one preset location point in the path and a phase information of the antenna corresponding to the at least one preset location point; and controlling a phase of the antenna according to the phase information when the moving carrier reaches the at least one preset location point. The present disclosure also provides an antenna phase control device.