Frequency-Selective Reflector Tiling With Alignment Marks
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Solution Overview
Problem
Existing reflect arrays face challenges in producing large-area structures due to limitations in production devices, and the tiling technique used to expand area leads to deviations in relative position, degrading reflection intensity and phase, thus failing to achieve desired reflection properties.
Innovation Solution
A reflecting structure with a frequency selective reflector is designed, featuring a substrate with alignment marks and frequency selective reflectors arranged side by side, where the distance between adjacent reflectors is less than half the wavelength of electromagnetic waves, ensuring high positional accuracy and effective tiling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the reflect array area is increased to reflect electromagnetic waves with high intensity in coverage holes, then the reflection intensity is improved, but the production becomes difficult due to constraints on production devices
Solution Approach 1:
The reflect array is divided into multiple frequency selective reflectors that can be produced separately and then tiled together. Each reflector is a manageable unit that can be manufactured with existing production devices, while the overall array achieves the required large area for high reflection intensity.
Solution Approach 2:
Multiple frequency selective reflectors are nested or tiled together to form a larger reflect array system. The individual reflectors are positioned adjacent to each other with precise spacing to create a unified large-area structure that maintains high reflection intensity while being producible with standard equipment.
2Area of stationary object
If the tiling technique is used to increase the reflect array area, then the area is expanded, but the relative position deviation degrades the reflection intensity and phase accuracy
Solution Approach 1:
A substrate with alignment marks serves as an intermediary structure that holds multiple frequency selective reflectors in precise relative positions. The alignment marks enable accurate positioning during assembly, ensuring that the tiled reflectors maintain the required positional accuracy for optimal electromagnetic wave reflection.
Solution Approach 2:
Alignment marks are pre-formed on the substrate before the frequency selective reflectors are positioned and fixed. This preliminary preparation ensures that when the reflectors are assembled in a tiled configuration, their relative positions can be accurately controlled to within less than 1/2 wavelength spacing, preventing degradation of reflection properties.
3Manufacturing precision
If the distance between adjacent frequency selective reflectors is reduced to less than 1/2 wavelength, then the reflection phase accuracy is maintained, but the manufacturing complexity increases
Solution Approach 1:
Multiple frequency selective reflectors are merged into a unified structure by mounting them on a common substrate with integrated alignment marks. This combining approach maintains the precise spacing required for phase accuracy while simplifying the overall manufacturing process through standardized assembly procedures.
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 proposed structure achieves excellent reflection properties and can be scaled to large areas without compromising reflection intensity or phase, effectively addressing the limitations of existing technologies.
Implementation Method 1
a frequency selective reflector reflecting electromagnetic waves in a particular frequency band in a direction different from a regular reflection direction
Implementation Method 2
By varying the size and shape of the reflective element, the resonant frequency of each reflective element is varied to control the reflection phase of the electromagnetic wave
Data Source
Figure 1
Figure 2
Figure 3(a)~3(b)
AI summary
The present disclosure provides a reflecting structure including a frequency selective reflector reflecting electromagnetic waves in a particular frequency band in a direction different from a regular reflection direction, the reflecting structure including: a substrate including a first alignment mark; and a plurality of the frequency selective reflectors disposed side by side on one surface of the substrate, wherein a distance between adjacent the frequency selective reflectors is less than 1/2 of a wavelength of the electromagnetic waves.