Multi-layer Skin Integrating PV and RF Antenna for UAVs
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing multi-functional systems combining photovoltaic (PV) cells and Radio Frequency (RF) antennas face challenges such as large size, weight, and conflicting directional priorities, particularly in mobile applications like aircraft platforms, where PV cells need to face the sun for maximum power generation and RF antennas require different orientations for effective communication.
Innovation Solution
A multi-functional, multi-layered film or skin with integrated PV and RF antenna elements, where both functionalities operate predominantly through opposing faces, allowing for independent directional tuning and reduced size and weight, using planar antenna designs and anti-reflection coatings to optimize energy harvesting and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If PV cells and RF antennas are independently positioned on structures without significant integration, then each system can be optimized for its own directional requirements, but the overall size and weight of the system increases significantly
Solution Approach 1:
The patent combines PV cells and RF antennas into a single integrated skin structure where both components are embedded within the same multi-layer film. This merging allows the system to achieve both directional optimizations while maintaining a compact form factor, as the PV and RF components share the same physical substrate rather than requiring separate mounting structures.
Solution Approach 2:
The integrated skin serves multiple functions simultaneously: it generates electrical power through PV cells, transmits and receives RF signals through embedded antennas, and provides structural coverage. This multi-functionality eliminates the need for separate independent systems, reducing overall weight while maintaining the ability to optimize each function's directional performance.
2Weight of stationary object
If PV cells and RF antennas are overlaid on top of each other, then the system size and weight are reduced, but the performance of one system is compromised by partial shading or shielding by the other
Solution Approach 1:
The patent transitions from a two-dimensional overlay arrangement to a three-dimensional integrated structure where PV cells and RF antennas are embedded at different depths and orientations within the multi-layer skin. This dimensional change allows both components to access their required directional orientations without physical interference, eliminating shading and shielding effects while maintaining compact integration.
Solution Approach 2:
The skin is divided into multiple functional layers with PV cells, RF antennas, and intermediate layers positioned at different depths. This segmentation allows each component to operate in its own optimized zone within the integrated structure, preventing performance degradation from mutual interference while maintaining overall system compactness.
3Device complexity
If PV and RF systems operate through the same face of the article, then the structure is simplified, but the system is inappropriate for elevated, airborne or space applications where the desired RF communications link orientation can be in the opposite direction to solar illumination
Solution Approach 1:
The patent enables bi-facial operation by embedding PV cells and RF antennas to operate through opposing faces of the skin. This dimensional configuration allows the system to adapt to elevated and airborne applications where solar illumination and RF communication requirements may come from opposite directions, significantly enhancing application versatility without excessive structural complexity.
Solution Approach 2:
The integrated skin employs asymmetric positioning of PV cells and RF antennas within the multi-layer structure, with each component oriented to face its optimal operational direction. This asymmetric design allows independent optimization of power generation and communication functions, making the system suitable for diverse applications including airborne platforms where directional requirements differ.
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
This configuration enhances performance and reliability by enabling efficient energy generation and communication on mobile platforms, such as UAVs, by allowing independent directional optimization of PV and RF systems, reducing size and weight, and mitigating interference issues.
Implementation Method 1
The first layer includes at least one photovoltaic (PV) cell. The photovoltaic cell is configured to generate electrical power from the electromagnetic radiation
Implementation Method 2
using planar antenna designs and anti-reflection coatings to optimize energy harvesting and communication
Data Source
AI summary
A multi-functional, multi-layer film or skin which may be used as a covering for a structure or platform incorporates an integrated photovoltaic element and an integrated RF antenna element. The film or skin is suitable for use in various applications, including those involving autonomous, self-powered, mobile communication systems and especially for use as a skin or covering for solar powered aircraft and UAVs. Planar PV cells and planar RF antenna are used to facilitate their integration into the film or skin. The PV cells and RF antenna are configured to face operate outward from opposite faces of the skin. The film or skin addresses potential problems arising from conflicting directional requirements for PV orientation and antenna pointing on mobile platforms. This is accomplished by employing wide angle AR coatings on the PV elements and electrical controls to steer the RF antenna.