Antenna Radome Surface Features for Wind Load Reduction
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Solution Overview
Problem
Conventional antenna radomes are prone to increased wind loading due to the addition of multiple antennas and antenna arrays, which can exceed design wind speed limits, leading to structural stress on towers even at lower wind speeds.
Innovation Solution
The design incorporates surface features such as ridges, depressions, and rounded corners, along with taper angles, to create a critical flow region over a wider range of wind speeds, reducing drag coefficients and wind loads on tower structures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple antennas and antenna arrays are added to base station sites, then network capacity and data service capability are improved, but wind load and structural stress on towers increase
Solution Approach 1:
The radome surface geometry is changed by adding longitudinal ridges and depressions, transforming the smooth surface into a textured surface that modifies airflow characteristics. This parameter change in surface topology reduces the drag coefficient and wind load while maintaining the radome's protective function
Solution Approach 2:
The radome incorporates curved surface features including longitudinal ridges, depressions, and rounded corners instead of sharp edges. These curved geometries promote smoother airflow attachment and reduce turbulence, thereby decreasing wind load on the antenna structure
2Ease of manufacture
If radome surface is made smooth, then manufacturing is easier, but wind loading increases at all wind speeds
Solution Approach 1:
Instead of making the entire radome surface uniformly smooth or uniformly textured, the invention applies specific surface features (ridges and depressions) only in longitudinal regions. This local differentiation optimizes wind flow control where needed while maintaining simpler geometry in other areas, balancing manufacturing ease with wind load reduction
3Manufacturing precision
If sharp corners are used in radome design, then manufacturing precision is easier to achieve, but drag coefficient and wind load increase
Solution Approach 1:
The invention replaces sharp corners with rounded corners throughout the radome structure. This curvature modification eliminates flow separation at corner regions, reduces vortex formation, and decreases the drag coefficient, thereby reducing wind load while remaining manufacturable
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
This approach ensures that antenna radomes experience lower overall stress on tower structures by maintaining maximum expected wind load at design speeds, while minimizing wind loading across a range of wind speeds, thus enhancing structural integrity.
Implementation Method 1
The plurality of surface features may be oriented longitudinal along the antenna radome... create a critical flow region over a wider range of wind speeds... reducing drag coefficients and wind loads
Data Source
AI summary
In one example, an antenna radome may have at least a first face that includes a plurality of surface features, where the plurality of surface features may include at least a first ridge and at least a first depression, and where the plurality of surface features may be oriented longitudinal along the antenna radome. In another example, an antenna radome may have at least a first face that includes a plurality of surface features, where the plurality of surface features may include at least a first ridge and at least a first depression, and where the plurality of surface features may be oriented transverse along the antenna radome.