Optical Control Phased Array Antenna Dispersion Compensation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional optical control type phased array antennas experience a decrease in reception efficiency due to phase differences between antenna elements caused by the arrival direction of reception waves, which is exacerbated by environmental changes such as temperature fluctuations, requiring accurate spatial alignment for compensation.
Innovation Solution
The optical control type phased array antenna employs a multi-wavelength light source, optical demultiplexing, optical modulators, an optical coupler, and optical dispersion compensators to compensate for phase differences between modulated optical signals without a spatial system, using non-spatial optical transmission lines like optical fibers to maintain reception efficiency across varying environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spatial optical compensation circuit is used to compensate for phase differences between antenna elements, then reception efficiency can be improved, but the system becomes highly sensitive to environmental changes such as temperature fluctuations, requiring highly accurate alignment
Solution Approach 1:
The patent replaces the spatial optical compensation circuit (which relies on precise physical alignment and spatial positioning) with an electrical signal processing system. The phase difference compensation is achieved through electrical signal processing in the baseband signal rather than through spatial optical paths, thereby eliminating sensitivity to environmental changes and alignment requirements.
Solution Approach 2:
The patent introduces a baseband signal as an intermediary between the antenna elements and the optical signal processing circuit. The phase difference information is extracted into the baseband signal, which then carries this information to the signal processing circuit for compensation, rather than requiring direct spatial optical compensation between antenna elements.
2Reliability
If a spatial optical compensation circuit is used to compensate for phase differences, then reception efficiency can be improved, but the alignment requirements become extremely stringent, increasing system complexity
Solution Approach 1:
The patent replaces the spatial optical compensation circuit (which relies on precise physical alignment and spatial positioning) with an electrical signal processing system. The phase difference compensation is achieved through electrical signal processing in the baseband signal rather than through spatial optical paths, thereby eliminating sensitivity to environmental changes and alignment requirements.
3Device complexity
If conventional optical control type phased array antenna is used, then the system structure is relatively simple, but phase differences occur between output signals of antenna elements in accordance with arrival direction of reception wave, causing decrease in reception efficiency
Solution Approach 1:
The patent introduces a baseband signal as an intermediary between the antenna elements and the optical signal processing circuit. The phase difference information is extracted into the baseband signal, which then carries this information to the signal processing circuit for compensation, rather than requiring direct spatial optical compensation between antenna elements.
Solution Approach 2:
The patent replaces the spatial optical compensation circuit (which relies on precise physical alignment and spatial positioning) with an electrical signal processing system. The phase difference compensation is achieved through electrical signal processing in the baseband signal rather than through spatial optical paths, thereby eliminating sensitivity to environmental changes and alignment requirements.
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 configuration effectively compensates for phase differences without spatial alignment, enhancing environmental resistance and reducing the size of the optical signal processing circuit, thereby maintaining high reception efficiency and adaptability to environmental changes.
Implementation Method 1
a plurality of optical modulators for generating a plurality of modulated optical signals by modulating the plurality of optical signals with output signals of the plurality of antenna elements
Implementation Method 2
a plurality of optical dispersion compensators for compensating for a phase difference between the plurality of modulated optical signals by performing dispersion compensation on the reception optical signals
Data Source
AI summary
An optical control type phased array antenna includes: a plurality of antenna elements; a multi-wavelength light source; an optical demultiplexing circuit for separating a plurality of optical signals and local oscillation light from output light of the multi-wavelength light source; optical modulators for generating a plurality of modulated optical signals by modulating the plurality of optical signals with the output signals of the plurality of antenna elements; an optical coupler for multiplexing the plurality of modulated optical signals and the local oscillation light to generate multiplexed light and dividing the multiplexed light into reception optical signals of a plurality of channels; and an optical dispersion compensation circuit for compensating for a phase difference between the plurality of modulated optical signals by performing dispersion compensation on the reception optical signals, respectively.