Dielectric Support Threads for RF-Transparent Satellite Antennas
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Solution Overview
Problem
Current satellite antenna radiating element assemblies face issues with bulky dielectric support structures that interfere with RF performance, cause power losses, and risk electro-static discharges (ESD), while also being time-consuming and costly to manufacture.
Innovation Solution
A radiating element support system utilizing small diameter, RF-transparent dielectric support threads that act as non-linear structural links to constrain the radiating element in axial, radial, and torsional directions, with near zero tension, and integrated with a central or external support structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If bulky dielectric support structures are used to support the radiating element, then structural support is provided, but RF performance is degraded and power losses occur
Solution Approach 1:
The support structure is segmented into multiple thin dielectric support threads rather than using a single bulky support structure. This segmentation reduces the bulk volume of dielectric material in the RF field, minimizing power losses and RF performance degradation while still providing necessary structural support through the distributed thread network
Solution Approach 2:
The patent uses thin dielectric threads (filaments) instead of bulky support structures. These thin films/threads provide the necessary mechanical support while having minimal interaction with the RF field, thereby reducing power losses and maintaining RF performance
2Strength
If separate supporting elements are used to support the radiating element, then structural support is provided, but assembly complexity and manufacturing time increase
Solution Approach 1:
The radiating element and support structure are merged into a single integrated component. The dielectric support threads are incorporated directly into the radiating element structure, eliminating the need for separate supporting elements and reducing assembly complexity while maintaining structural support functionality
3Strength
If adhesive bonding is used to connect support elements to the radiating element, then structural connection is provided, but power carrying capability is limited
Solution Approach 1:
The adhesive bonding layer is extracted/removed from the connection between the support structure and radiating element. The integrated design eliminates the need for adhesive bonding, thereby removing the power carrying limitation imposed by adhesive materials and allowing direct structural connection
4Strength
If dielectric support structures are used, then structural support is provided, but electro-static discharge risk increases
Solution Approach 1:
The support structure is segmented into thin dielectric threads rather than using a large continuous dielectric structure. This segmentation reduces the total surface area and bulk volume of dielectric material, thereby reducing the risk of electro-static discharge accumulation and discharge events that could damage the payload
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 minimizes the impact on RF performance, reduces the risk of ESD, and simplifies the manufacturing process by using a lightweight, flexible support system that maintains the radiating element's shape and position during launch and on-orbit operations.
Implementation Method 1
a plurality of dielectric support threads that act as non-linear structural links which interconnect the radiating element to constrain the radiating element in one or more of an axial direction, a radial direction, and a torsional direction, and that are taut with near zero tension
Implementation Method 2
the dielectric material of the supporting structure may influence the radiation pattern of the antenna
Implementation Method 3
the dielectric material of the supporting structure may cause power losses
Implementation Method 4
lead to sudden electro-static discharges (ESD) which can damage the payload
Data Source
AI summary
Provided are systems and methods for a radiating element assembly, for an antenna. The radiating element assembly includes a radiating element for emitting and/or receiving electromagnetic waves and a radiating element support system for physically supporting the radiating element when in operation. The radiating element support system includes a plurality of dielectric support threads, where the plurality of dielectric support threads act as non-linear structural links which interconnect the radiating element to constrain the radiating element in one or more of an axial direction, radial direction, and torsional direction, and the plurality of dielectric support threads are taut with near zero tension, and at least one support wherein the plurality of threads interconnect the radiating element with the at least one support to constrain the radiating element in the axial and/or radial and/or torsional directions. The radiating element support system may be used to constrain other satellite payloads.