Phased Antenna Array Beam Tracking for LEO Satellite Phones
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Solution Overview
Problem
The long distance between a satellite and a mobile phone results in poor signal transmission and receiving ability due to the large directional changes of the satellite relative to the mobile phone, leading to signal attenuation and instability.
Innovation Solution
An antenna system comprising a first antenna with a plurality of radiation units arranged in an array on the back cover of a wireless communication device, along with a phase modulation unit and a beam tracking module, to improve antenna gain and adjust the radiation direction to match the satellite's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single radiation unit antenna is used, then the device complexity is low, but the signal transmission and receiving ability is poor
Solution Approach 1:
The antenna system divides a single radiation unit into multiple radiation units arranged in an array. Each radiation unit operates independently but cooperates to provide beamforming capabilities, thereby improving signal transmission and receiving ability while maintaining manageable device complexity through modular segmentation.
Solution Approach 2:
Multiple radiation units are combined into a unified antenna system with integrated phase modulation units and beam tracking modules. This merging enables the system to achieve enhanced signal transmission and receiving ability through constructive interference and directional beamforming, while the integrated control structure manages complexity.
2Adaptability or versatility
If the satellite direction changes relative to the mobile phone, then the adaptability to satellite movement is required, but the signal becomes attenuated when the radiation pattern does not point directly to the satellite
Solution Approach 1:
The antenna system implements dynamic beam tracking through dedicated beam tracking modules that continuously monitor satellite position and adjust the radiation pattern in real-time. Phase modulation units dynamically modify the phase of each radiation unit to maintain optimal signal quality as the satellite moves relative to the mobile phone, ensuring the radiation pattern always points toward the satellite.
Solution Approach 2:
The beam tracking modules receive feedback information about satellite position and orientation, then use this feedback to adjust the phase and amplitude of each radiation unit. This closed-loop control system ensures the antenna array maintains accurate directional alignment with the moving satellite, preventing signal attenuation and maintaining high signal quality throughout the satellite's orbital passage.
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
The antenna system significantly enhances signal quality and stability by increasing antenna gain and ensuring optimal radiation direction alignment with the satellite, effectively addressing issues of signal attenuation and instability.
Implementation Method 1
a phase modulation unit and a beam tracking module, to improve antenna gain and adjust the radiation direction to match the satellite's position
Implementation Method 2
An antenna system comprising a first antenna with a plurality of radiation units arranged in an array on the back cover of a wireless communication device
Data Source
AI summary
An antenna system for improved satellite communication with a ground-based terminal device includes a first antenna, a feeding point, and a phase modulation unit. The first antenna is on a surface of a back cover of the terminal device, and the first antenna comprises a plurality of radiation units in an array. The feeding point feeds power and signals to the first antenna. The phase modulation unit can adjust the transmission phase of the different radiation units within the first antenna. The present disclosure also provides a wireless terminal.