Grating Isolation Fence Layout for Antenna Polarization Purity
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Solution Overview
Problem
Existing antenna designs face challenges in maintaining high polarization purity due to cross-polarization issues, which are exacerbated by complex equipment and technical conditions required for polarization control.
Innovation Solution
A design method and device for a high polarization isolation fence, comprising a plurality of grating strips arranged parallel to the polarization direction of the feed antenna, with structural parameters optimized through performance testing and debugging to enhance polarization isolation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If antenna materials with high quality and thermal stability are selected to minimize polarization changes, then polarization purity is improved, but manufacturing cost increases
Solution Approach 1:
The patent replaces expensive high-stability materials with ordinary materials that have shorter operational lifespan or lower stability, achieving cost reduction while maintaining acceptable polarization purity through the grating strip structure compensation
Solution Approach 2:
The patent changes the structural parameters of the grating strips (spacing, width, length, arrangement pattern) to compensate for material imperfections, achieving high polarization purity through geometric optimization rather than material quality
2Reliability
If the structural design of the antenna is adjusted to reduce polarization changes, then polarization purity is improved, but device complexity increases
Solution Approach 1:
The patent divides the antenna structure into separate components: the original antenna and an independent grating strip fence structure. This segmentation allows the polarization isolation function to be added without redesigning the entire antenna system, reducing design complexity
Solution Approach 2:
The grating strip fence acts as an intermediary structure between the antenna and the propagation environment, providing polarization isolation without requiring modifications to the antenna's internal structure, thus simplifying the overall design
3Reliability
If polarization selectors are used to control polarization modes, then polarization purity is improved, but device complexity increases
Solution Approach 1:
The patent extracts the polarization control function from complex polarization selector equipment and implements it through a simple passive grating strip structure, eliminating the need for active polarization selection devices
Solution Approach 2:
The patent replaces complex mechanical or electronic polarization selection systems with a static grating strip structure that provides polarization isolation through its geometric configuration, eliminating moving parts and control electronics
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 method effectively reduces cross-polarization signal strength while maintaining main polarization echo signal strength, simplifying the design process and eliminating the need for complex equipment and technical conditions.
Implementation Method 1
The grating strips are arranged in an array along a first direction, where the first direction is parallel to a polarization direction of a feed antenna... reflecting waves with a polarization direction perpendicular to the grating strips
Implementation Method 2
a plurality of grating strips arranged along a first direction... the distance optimization range is 0.45-0.55 times the wavelength
Data Source
AI summary
The present disclosure provides a design method and device for a high polarization isolation fence which includes the following steps: Setting the material, application environment, and initial structural parameters of the high polarization isolation fence to form an initialized high polarization isolation fence and performing it to obtain antenna performance parameters with the initialized high polarization isolation fence and without the high polarization isolation fence loaded; Debugging the initial structural parameters to determine the optimization range corresponding to each structural parameter; and obtaining the target high polarization isolation fence based on the optimization range corresponding to each structural parameter and the current antenna performance parameters of the initialized high polarization isolation fence. Based on the optimization range, this design method can quickly select the structural parameters of the target high polarization isolation fence with excellent performance, and effectively reduce the design difficulties.