Deployable Inflatable Lens Antenna for Space
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Solution Overview
Problem
Deployable satellite antennas face challenges in unfolding without creases or tears, leading to imperfections in curvature, and existing designs are costly and complex, with a high risk of malfunction due to numerous moving parts and difficulty in retraction.
Innovation Solution
A deployable lens system comprising nested bladders filled with fluids of varying refractive indices, which are inflated to form a gradient-index lens, allowing for a large, spherical antenna to be packed compactly and deployed in space, reducing the need for multiple dishes and minimizing malfunctions by eliminating hinges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If deployable antenna dishes are unfurled using actuators, then large antenna size is achieved, but creases or tears occur causing imperfections in curvature
Solution Approach 1:
The patent employs a flexible membrane structure that can be deployed without rigid joints or hinges. The membrane is inflated to achieve the desired parabolic shape, eliminating creases and tears that would occur with mechanical unfurling. This flexible shell approach allows large antenna surfaces to be deployed smoothly while maintaining manufacturing precision.
Solution Approach 2:
The patent uses pneumatic inflation to deploy and maintain the antenna shape. By inflating the membrane structure with gas or liquid pressure, the antenna achieves its large deployed size without mechanical actuators that could cause creases. The pneumatic system provides uniform pressure distribution across the membrane, ensuring smooth curvature and eliminating manufacturing defects.
2Manufacturing precision
If rigid structures with near-perfect curvature are used, then manufacturing precision is improved, but device complexity and weight increase
Solution Approach 1:
The patent replaces complex rigid structures with a simple flexible membrane that achieves near-perfect parabolic curvature through inflation. This thin-film approach dramatically reduces structural complexity and weight while maintaining the required manufacturing precision for antenna performance.
Solution Approach 2:
The patent changes the physical state of the antenna structure from rigid to flexible by using inflatable membranes. This parameter change allows the structure to achieve its precise geometric form during deployment through pressure control, eliminating the need for complex rigid frameworks while maintaining manufacturing precision.
3Adaptability or versatility
If multiple dishes are used to cover different directions, then adaptability is improved, but device complexity and weight increase
Solution Approach 1:
The patent employs a deployable inflatable membrane that can dynamically change its orientation and shape in space. This single dynamic structure can be positioned to cover different directions, replacing multiple static dishes. The membrane's flexibility allows it to be reoriented as needed, providing multi-directional adaptability without the complexity of multiple separate antenna systems.
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 system enables a large, efficient antenna to be deployed in space with reduced complexity and weight, maintaining signal quality while minimizing the risk of malfunction and allowing for simultaneous transmission and reception in multiple directions.
Implementation Method 1
a first bladder configured to be filled with a first fluid, the first fluid having a first index of refraction; and a second bladder nested within the first bladder, wherein the second bladder is configured to be filled with a second fluid, the second fluid having a second index of refraction
Data Source
AI summary
A technique for a dielectric lens and an antenna assembly. The dielectric lens that includes a for a reference surface and a pattern of varying thicknesses made from a first dielectric. The pattern of varying thicknesses is situated on the reference surface. The thickness differences between adjacent formations of the pattern of varying thicknesses is less than an incident wavelength of electromagnetic energy. The antenna includes mounting fixture, the dielectric lens connected to the mounting fixture, and a transceiver operatively coupled to the mounting fixture. The transceiver is configured to transmit an electromagnetic signal directed to the dielectric lens.