Antenna Feed Cap Hydrophobic Surface Geometry
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Solution Overview
Problem
Antenna apparatus experiences signal loss and increased error rates due to the retention of rain, snow, or hail on the feed cap, which conventional solutions like hydrophobic coatings fail to effectively address, leading to increased complexity and expense.
Innovation Solution
The antenna apparatus features a feed cap with a surface formed to have hydrophobic properties through a three-dimensional profile created via laser etching, ensuring a contact angle of 100° or greater, minimizing water and snow retention and potentially condensation, thereby improving signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a hydrophobic coating is applied to the feed cap surface, then water retention is reduced, but the coating breaks down over time and forms debris that worsens antenna performance
Solution Approach 1:
The patent replaces the chemical hydrophobic coating system with a mechanical/physical surface structure system. The feed cap surface is molded with a three-dimensional profile consisting of protrusions and recesses that physically prevent water and snow accumulation through geometric design rather than chemical properties. This mechanical approach eliminates the degradation and debris formation issues associated with organic coatings.
Solution Approach 2:
The patent changes the surface geometry parameter of the feed cap by introducing a three-dimensional profile with specific protrusions and recesses. This parameter change creates a surface structure that inherently repels water and snow through physical geometry, achieving the hydrophobic effect without requiring degradable chemical coatings.
2Ease of manufacture
If conventional feed cap materials are used, then manufacturing is simple, but signal loss occurs due to rain and snow retention
Solution Approach 1:
The patent replaces the chemical coating system with a molded surface geometry system. The three-dimensional profile is integrated into the feed cap manufacturing process itself, combining the hydrophobic function with the base structure. This approach maintains manufacturing simplicity while eliminating precipitation retention and associated signal loss.
Solution Approach 2:
The patent creates a composite surface structure by integrating the three-dimensional hydrophobic profile into the feed cap material during molding. The resulting structure combines the base material properties with the functional surface geometry, achieving both ease of manufacture and resistance to precipitation retention.
3Ease of manufacture
If the feed cap surface is made smooth, then manufacturing is easier, but water and snow accumulate on the surface
Solution Approach 1:
The patent applies curved surface geometry by creating a three-dimensional profile with protrusions and recesses on the feed cap surface. This curvature and geometric variation prevent water and snow from forming continuous layers, causing them to bead up and roll off, thereby preventing accumulation while remaining manufacturable through molding processes.
4Reliability
If antenna parameters are adjusted to compensate for signal loss, then data quality is maintained, but system complexity and expense increase
Solution Approach 1:
The patent extracts and eliminates the source of the problem (precipitation retention on the feed cap) rather than compensating for its effects. By preventing water and snow accumulation at the source through surface geometry, the need for complex parameter adjustments and additional components is removed, simplifying the overall system while maintaining data quality.
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 hydrophobic feed cap design reduces signal loss and maintains data quality, potentially eliminating the need for additional components or adjustments, reducing the overall complexity and cost of the antenna system while maintaining acceptable data quality.
Implementation Method 1
a surface formed so as to have hydrophobic qualities
Implementation Method 2
the contact angle of a drop of water is 100° or greater
Data Source
AI summary
The invention is directed toward antenna apparatus of the type for use in receiving broadcast data signals, such as those transmitted from one or more satellites and also, in certain embodiments the antenna apparatus is capable of transmitting data signals. The antenna apparatus includes at least one component which is provided with a surface, typically an external surface, which is provided with hydrophobic properties such that the gathering of water, condensation and/or snow is reduced hence improving the performance of the antenna and reducing data loss from the data signals.