Patch Antenna Spacer Structure for Weather Protection and RF Transmission
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Solution Overview
Problem
Satellite communication systems face challenges in protecting Earth-based antennas from environmental conditions such as weather while maintaining effective radio frequency communications.
Innovation Solution
The development of an antenna assembly with a patch antenna array, a spacer made from thermally conductive plastic with a honeycomb pattern, and a dielectric layer, which aligns with the antenna elements to provide durability and minimize signal attenuation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective housing is added to shield antenna components from environmental factors, then durability and protection are improved, but device complexity and signal attenuation increase
Solution Approach 1:
The housing assembly is divided into multiple functional layers: radome portion for RF signal transmission, radome spacer for spacing and structural support, and lower enclosure for environmental protection. This segmentation allows each layer to be optimized for its specific function while working together as an integrated system.
Solution Approach 2:
The radome spacer serves multiple functions simultaneously: it provides structural spacing between the radome and antenna elements, supports the antenna elements in position, and features apertures aligned with antenna elements to maintain RF signal transmission. This multi-functionality reduces the need for additional separate components.
2Strength
If a solid spacer material is used to support antenna elements, then structural strength is improved, but thermal management and signal transmission deteriorate
Solution Approach 1:
The radome spacer incorporates apertures (openings) that align with the antenna elements, creating a porous structure. This allows RF signals to pass through the spacer with minimal attenuation while maintaining the structural integrity needed to support the antenna elements. The apertured design reduces material density while preserving mechanical strength.
3Volume of moving object
If antenna elements are closely spaced to reduce device size, then compactness is improved, but signal interference and manufacturing precision requirements worsen
Solution Approach 1:
The radome spacer is designed with pre-formed apertures positioned at precise locations corresponding to antenna element positions. This preliminary positioning structure guides the placement and alignment of antenna elements during assembly, ensuring accurate spacing and alignment while simplifying the manufacturing process.
Solution Approach 2:
The radome spacer acts as an intermediary component between the radome and the antenna elements, providing a structured framework that maintains precise spacing and alignment. The apertures in the spacer serve as positioning guides, mediating the relationship between the protective housing and the sensitive antenna elements.
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 solution effectively protects the antenna components from environmental factors while ensuring reliable radio frequency communications by using a thermally conductive spacer that dissipates heat and minimizes signal interference.
Implementation Method 1
The spacer has a dielectric constant of less than 3.0 and a thermal conductivity value of greater than 0.35 W/m-K
Implementation Method 2
a dielectric layer adjacent the lower patent antenna layer
Data Source
AI summary
In one embodiment of the present disclosure, an antenna assembly includes a patch antenna array including an upper patch antenna layer, a lower patch antenna layer, and a spacer therebetween, wherein the spacer includes a plurality of apertures defined by cell walls, wherein the each aperture aligns with an upper patch antenna element and a lower patent antenna element from the patch antenna array.