L-Shaped Resonant Element Diffraction Device Weather Protection
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Solution Overview
Problem
Existing electromagnetic wave diffraction devices, such as those with conductive tubular resonant elements, are inefficient due to increased capacitance and reduced performance when exposed to water, leading to parasitic reflections of radioelectric signals in sensitive directions, particularly in airport environments.
Innovation Solution
An electromagnetic wave diffraction device with L-shaped resonant elements and a dielectric, waterproof panel covering the capacitive zone between the conductive elements and the exterior face, protecting the device from weather aggressions and optimizing its performance by reducing capacitance sensitivity and material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the slot and fins are exposed to the outside to form the capacitor, then the device structure is simple and easy to manufacture, but the capacitance increases when exposed to water, reducing efficiency
Solution Approach 1:
A protective panel made of dielectric and waterproof material is introduced as an intermediary element between the capacitive zone (slot and fins) and the external environment (water). This panel prevents water from directly contacting the capacitor components, thereby maintaining stable capacitance values and diffraction device efficiency while allowing the device to be manufactured with the simple slot-and-fins structure.
2Ease of operation
If the slot faces outwards to form the capacitor, then the capacitive zone is accessible for device assembly, but the capacitive zone is exposed to weather aggressions, modifying device characteristics
Solution Approach 1:
The protective panel is pre-installed to cover the capacitive zone before the device is exposed to weather conditions. This preliminary protective action prevents water and other environmental factors from reaching the slot and fins, ensuring that the capacitor characteristics remain stable throughout the device's operational life while maintaining the outward-facing configuration for assembly purposes.
3Reliability
If conductive tubular resonant elements are used, then the device achieves diffraction function, but material costs and device weight increase
Solution Approach 1:
The device uses composite construction where the protective panel is made of dielectric and waterproof materials combined with the conductive resonant elements. This composite approach allows the resonant elements to maintain their diffraction function while the dielectric panel provides protection without adding excessive weight, as dielectric materials are generally lighter than the alternative protective coatings or structures.
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 solution effectively prevents the modification of the diffraction device's characteristics by external elements like water, enhancing its efficiency and reducing material costs while maintaining performance across varying weather conditions.
Implementation Method 1
a block made with a water dielectric material housed between the exterior face and the second wall so as to fill the interior volume of the L-shaped resonant element
Implementation Method 2
electromagnetic wave diffraction device which is intended to equip an electrically conductive wall
Implementation Method 3
a block made with a water dielectric material housed between the exterior face and the second wall
Implementation Method 4
The material of said block is waterproof
Data Source
Figure 1~2
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Figure 6~7
AI summary
The invention relates to an electromagnetic wave diffraction device (500) intended to be fixed to the outer face (12) of a wall (10), the diffraction device (500) comprising: - a plurality of resonant elements (102) in the form of an L-shaped profile which are electrically conductive and fixed parallel to each other on the outer face (12), - each resonant element (102) comprising a first wall (104) and a second wall (106) fixed perpendicularly to each other along a common edge (108), the first wall (104) being intended to be fixed perpendicularly to the outer face (12) by a fixing edge (110) parallel to the common edge (108), while the edge of the second wall (106) which is parallel to the common edge (108) constitutes a free edge (112) and where the free edges (112) of all the resonant elements (102) are parallel and arranged on the same side with respect to the common edge (108) of the corresponding resonant element (102),and - protective means intended to reinforce the protection of a capacitive zone generated in a space between the outer face (12) and the second wall (106), against meteorological aggressions and taking the form of a panel (502) made of a dielectric and waterproof material, fixed to the outer face (12) and covering the plurality of resonant elements (102).