Two-Part Horn Antenna for Radar Level Measurement
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Solution Overview
Problem
Horn antennas in radar level measuring devices are unsuitable for harsh environments due to sensitivity to dirt, corrosion, and pressure conditions, requiring frequent dismantling for cleaning and maintenance, which is time-consuming and labor-intensive.
Innovation Solution
A two-part design for the antenna horn with a fastening arrangement allows the device-side part to remain on the container during cleaning, while the temperature-sensitive electronics can be removed, using high-performance materials like PEEK for the second part to withstand aggressive media and temperature fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the horn antenna is completely filled with solid medium and sealed, then protection against contamination and corrosion is improved, but the ability to withstand overpressure and underpressure deteriorates
Solution Approach 1:
The horn antenna is divided into multiple sections along its length, with different filling arrangements in different sections. The front section may be filled with solid medium for protection, while the rear section remains open or has different filling, allowing pressure equalization while maintaining contamination protection where needed.
Solution Approach 2:
Different sections of the horn antenna have different filling configurations tailored to their specific functional requirements. The front radiation section may be filled for protection, while the feed section remains accessible, creating local variations in protection level matching local needs.
2Reliability
If the horn antenna is sealed with radome or solid filling, then protection against aggressive media is improved, but suitability for autoclaving and cleaning procedures deteriorates
Solution Approach 1:
The horn antenna is divided into removable sections that can be separated for cleaning. The front section that contacts aggressive media can be detached and autoclaved separately, while the electronics in the rear section remain protected, enabling proper sterilization without damaging sensitive components.
Solution Approach 2:
The filling arrangement is designed to be dynamic rather than fixed - sections can be added, removed, or reconfigured based on cleaning requirements. This allows the antenna to transition between protected operational state and cleanable disassembled state.
3Ease of manufacture
If the horn antenna is designed as single integrated unit, then manufacturing simplicity is improved, but maintenance time and labor intensity deteriorates
Solution Approach 1:
The horn antenna is constructed from multiple modular sections that can be manufactured separately and assembled. This segmentation enables selective replacement of only the contaminated front section during maintenance, rather than requiring complete disassembly or replacement of the entire antenna, significantly reducing maintenance time and labor.
4Reliability
If the antenna horn is completely filled with solid medium, then protection against contamination is improved, but temperature-sensitive components are exposed to high temperature and pressure
Solution Approach 1:
The horn antenna is divided into a front section that can be filled with solid medium for protection and a rear section containing temperature-sensitive electronics that remains unfilled or has different filling. This segmentation creates a physical barrier that protects electronics from high temperature and pressure while maintaining contamination protection in the radiation section.
Data Source
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AI summary
Horn antenna (1) for a radar measuring device, in particular a radar level measuring device, comprising: - an antenna horn (3) radiating from the front in a main radiation direction A with a rear feed (5), - a fastening arrangement (7) for sealing attachment to a container (50), - and at least partial filling (9) of the antenna horn (3) with a solid, wherein the antenna horn is formed in at least two parts with a first device-side part (31) and a second container-side part (32).