Low-Wind-Load Antenna Radome With Flow-Separation Control
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Solution Overview
Problem
Existing antennas are subjected to high wind loads due to increased demand for wireless communication, requiring larger antenna units that increase Effective Projected Area (EPA), necessitating improved design to minimize wind loading.
Innovation Solution
The design incorporates features such as large radiused corners, domed end caps, spiral ridges, and protuberances on the radome and end caps to delay flow separation and reduce wind load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If antenna size is increased to handle more wireless traffic, then wireless communication capacity is improved, but wind load increases
Solution Approach 1:
The radome incorporates curved surfaces including a domed front surface and domed end caps instead of flat surfaces. This curvature allows wind to flow more smoothly over the antenna structure, reducing turbulence and pressure differential, thereby decreasing wind load while maintaining the antenna's communication capacity
Solution Approach 2:
The design modifies geometric parameters of the radome including adding protuberances on the front surface, spiral ridges, and continuous protuberances on side surfaces. These parameter changes optimize the aerodynamic characteristics to reduce wind load while preserving the antenna's functional performance
2Area of stationary object
If Effective Projected Area is increased to improve signal coverage, then wireless coverage is improved, but wind loading increases
Solution Approach 1:
The radome uses a curved domed front surface and domed end caps that reduce the effective projected area presented to the wind while maintaining adequate signal coverage. The curved geometry allows wind to flow around the structure more efficiently, reducing wind loading
3Object-affected harmful factors
If antenna structure is made more aerodynamic to reduce wind load, then wind load resistance is improved, but manufacturing complexity increases
Solution Approach 1:
The radome is designed with curved surfaces including domed end caps and a domed front surface. These curved features can be manufactured as integral parts of the radome structure using conventional molding techniques, achieving aerodynamic benefits without excessive manufacturing complexity
Solution Approach 2:
The aerodynamic features such as protuberances and spiral ridges are applied locally on specific surfaces of the radome rather than requiring complete structural redesign. This allows targeted aerodynamic optimization while maintaining relatively simple overall manufacturing processes
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
These features effectively reduce wind load by minimizing drag and pressure differential, enhancing the aerodynamic performance of antennas.
Implementation Method 1
at least one airflow separation delaying feature selected from the group consisting of: large radiused corners on the lower end cap; a domed upper end cap; a domed lower end cap; a plurality of protuberances on the front surface; a plurality of protuberances on each of the side surfaces; spiral ridges on the front surface; and a continuous protuberance on each of the side surfaces
Data Source
AI summary
A reduced wind load antenna includes: a radome having front, rear, and side surfaces; upper and lower end caps attached to upper and lower ends of the radome to define an internal cavity; and radiating elements positioned within the internal cavity and configured to transmit and receive radio frequency (RF) signals. The antenna includes at least one airflow separation delaying feature selected from the group consisting of: large radiused corners on the lower end cap; a domed upper end cap; a domed lower end cap; a plurality of protuberances on the front surface; a plurality of protuberances on each of the side surfaces; spiral ridges on the front surface; and a continuous protuberance on each of the side surfaces.