Apertured Radome Structure to Prevent Thin-Film RF Distortion
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Solution Overview
Problem
Thin radomes used to protect RF systems from adverse weather conditions are susceptible to physical distortion, which affects RF transmission characteristics and communication system performance.
Innovation Solution
A millimeter-wave radome design featuring a thin film backed by a support, both made from low-loss materials, is integrated into the radome body with an aperture, providing structural stability and minimizing distortion from wind and environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a thin radome is used to reduce weight and improve RF signal transparency, then weight and RF transparency are improved, but the radome becomes susceptible to physical distortion from gravity, wind loading, or ice
Solution Approach 1:
The radome is divided into multiple segments including a front radome portion, rear radome portion, and intermediate radome portions with apertures. This segmentation allows each portion to be optimized independently - the front portion can be thin for RF transparency while the rear portion provides structural support, resolving the contradiction between weight reduction and physical stability
Solution Approach 2:
The radome employs composite construction with multiple material layers and structures including dielectric materials with specific permittivity values, foam cores, and reinforced apertures. These composite structures provide both the lightweight properties needed for RF transparency and the structural integrity to resist physical distortion from environmental factors
2Loss of energy
If a thin radome is used to improve RF signal transparency, then RF transmission characteristics are improved, but distortion along the boresight significantly changes the antenna transmission/reception pattern
Solution Approach 1:
Different portions of the radome have different thicknesses and material properties optimized for their specific functions. The front radome portion is designed with specific dielectric properties for optimal RF transmission, while the rear portion and aperture structures provide structural support to maintain boresight alignment, ensuring both low RF loss and reliable antenna performance
Solution Approach 2:
The radome design incorporates aperture structures with supports that extend into the radome body, adding structural support in the dimensional space without significantly increasing the external profile. This allows the radome to maintain thinness for RF transparency while providing internal reinforcement to prevent distortion that would affect antenna patterns
Data Source
AI summary
A radome and a method for manufacturing same. A radome apparatus has a radome body having an aperture, a film covering the aperture, and a support installed into the aperture. The film and the support have a low loss at a desired operating frequency. The support provides backing, support, and rigidity for the film so that distortion of the film by weather conditions, such as wind, is reduced. Thus, the integrity of the RF transmission characteristics of the radome are preserved. The aperture, film, and support are in the boresight of an antenna and are large enough to accommodate a desired beam steering range. The radome body may be manufactured with the aperture and the film included therein by using an in-mold labeling process. The support may be installed in the aperture by a subsequent molding process.