Metallized Plastic Antenna Funnel for Radar
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Solution Overview
Problem
Existing fill level measuring devices with metallic antennas are mechanically demanding to manufacture, heavy, and prone to mechanical stress under fluctuating ambient conditions, limiting their use in harsh environments.
Innovation Solution
A metalized plastic antenna with a metallized interior cavity filled with a stabilizing material, such as foam or dielectric, providing increased mechanical strength and chemical resistance, and equipped with a conductive lacquer or vapor deposition metallization for efficient electromagnetic wave transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If metallic antennas are used for fill level measurement, then electromagnetic wave transmission is achieved, but the antenna weight increases considerably and mechanical stress resistance decreases
Solution Approach 1:
The patent applies composite materials by combining plastic (polymer) with metal coating layers to create a hybrid antenna structure. The plastic base provides lightweight properties and mechanical flexibility, while the metal coating layers (conductive polymer or thin metal films) provide electromagnetic wave conduction. This composite approach resolves the contradiction by achieving both weight reduction and maintained electrical functionality.
Solution Approach 2:
The patent changes the material parameters from solid metal to layered composite structures with varying thicknesses and conductivities. By controlling the thickness and conductivity of the metal coating layers on the plastic substrate, the antenna achieves optimal balance between weight, mechanical strength, and electromagnetic performance, thereby resolving the weight-reliability contradiction.
2Strength
If solid metal materials are used for antenna manufacturing, then structural strength is achieved, but manufacturing complexity and mechanical processing requirements increase
Solution Approach 1:
The patent replaces traditional mechanical metalworking processes (cutting, welding, forming) with chemical and physical deposition methods. The antenna structure is created by depositing conductive layers onto a pre-formed plastic substrate, eliminating the need for complex metal machining and welding operations, thus simplifying manufacturing while maintaining structural integrity.
Solution Approach 2:
The antenna is segmented into distinct functional layers: a plastic structural base providing mechanical strength, and separate conductive coating layers providing electrical functionality. This segmentation allows each layer to be optimized and manufactured independently, then combined through simple bonding or deposition processes, reducing overall manufacturing complexity.
3Ease of manufacture
If plastic antenna bodies are used, then weight is reduced and manufacturing is simplified, but electromagnetic wave conduction capability is insufficient
Solution Approach 1:
The patent uses composite materials by combining insulating plastic with conductive metal coatings or conductive polymers. The plastic provides ease of manufacture and weight reduction, while the conductive layers (applied through sputtering, evaporation, or conductive polymer deposition) provide the necessary electromagnetic wave conduction capability, resolving the contradiction between manufacturing ease and electrical performance.
Solution Approach 2:
The patent applies local quality by providing conductive properties only in specific regions where needed for electromagnetic wave conduction, rather than making the entire antenna structure conductive. The conductive layers are selectively applied to the antenna's radiating elements and signal paths, maintaining plastic's manufacturing advantages while ensuring adequate electrical performance in critical areas.
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 metalized plastic antenna reduces production costs and weight, enhances mechanical strength, and improves resistance to environmental stressors, allowing for use in conditions previously unsuitable for traditional antennas.
Implementation Method 1
the inside of the antenna body having a metal coating for conducting electromagnetic waves
Implementation Method 2
The filling of the cavity can serve to stabilize the antenna and increase the mechanical strength of the antenna
Implementation Method 3
the encapsulation can be designed as a lens for focusing the electromagnetic waves... the encapsulation can on the one hand serve to protect against contamination, chemical substances
Data Source
Figure 1
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AI summary
According to one embodiment of the present invention, a metallized plastic antenna is described, comprising a plastic antenna body with an internal metallization. The metallization serves to conduct electromagnetic waves. Furthermore, the metallization can be designed as a protective coating, thus ensuring chemical resistance of the plastic antenna even under aggressive environmental conditions.