3D-Printed RF Tunable Composites With Dual-Curing Networks
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Solution Overview
Problem
Existing 2D printing and material assembly techniques struggle to fabricate RF devices that can operate over a wide range of frequencies due to limitations in penetrating depth of waveforms into structures, which is not accommodated by these technologies.
Innovation Solution
The development of RF tunable materials compatible with additive manufacturing techniques, such as 3D printing, which allows for the formation of RF devices like antennas and graded index devices that can operate over a wide frequency range by using interpenetrating networks of composite materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional 3D printing techniques with UV curing are used, then structure fabrication is enabled, but performance materials cannot be included at sufficient concentrations due to light absorption limiting curing depth
Solution Approach 1:
The patent introduces a dual-curing system where a first curing mechanism (UV light) cures the resin matrix, and a second curing mechanism (thermal or radiation curing) cures the performance materials. This intermediary approach allows both the resin and performance materials to be cured independently, enabling sufficient concentration of performance materials without compromising curing completeness.
Solution Approach 2:
The patent changes the curing parameters by using different curing mechanisms for different components. The resin is cured using UV light at specific wavelengths and intensities, while the performance materials are cured using thermal energy or radiation at different parameters. This parameter separation allows both materials to achieve proper curing without mutual interference.
2Length of moving object
If 2D printing techniques are used, then fabrication is possible, but waveforms cannot penetrate deeply enough into structures to achieve desired RF requirements
Solution Approach 1:
The patent transitions from 2D printing to 3D additive manufacturing, adding the vertical dimension to structure fabrication. This enables waveforms to penetrate through three-dimensional structures with controlled paths, achieving the necessary penetration depth while maintaining ease of manufacture through layer-by-layer construction.
Solution Approach 2:
The patent implements local quality by varying the density, composition, and structure of different regions within the 3D printed object. This allows optimization of waveform penetration in specific areas while maintaining structural integrity elsewhere, achieving desired RF performance without compromising manufacturing ease.
3Adaptability or versatility
If high concentration of performance materials is used for RF tunability, then RF tuning ability improves, but light penetration depth for curing decreases
Solution Approach 1:
The patent segments the curing process into two independent stages: first curing the resin matrix using UV light, then curing the performance materials using thermal or radiation methods. This segmentation allows high concentration of performance materials to be used for RF tunability without compromising light penetration depth, as the second curing step does not rely on light penetration.
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 approach enables the fabrication of RF devices with tunable frequency ranges, overcoming the limitations of traditional 2D techniques by allowing for the creation of small unit cells and structures over large areas, with enhanced RF tunability and compatibility with secondary stack-ups and patterning.
Implementation Method 1
Conventional 3D printing techniques often utilize ultraviolet (UV) curing or laser curing of a resin in order to set the initial structure
Data Source
AI summary
Radio frequency (RF) tunable materials which are readily compatible with additive manufacturing techniques, such as 3D printing technologies, are provided. RF tunable materials are used to form an RF device that operates over a wide range of frequencies. The RF device is formed by interpenetrating structures of one or more composite materials. One or more curing methods are applied to the structures. The composite materials include performance materials and are be used to fabricate RF devices including RF antennas, RF horn antennas, graded index devices.