Conformal Metallic Waveguide with Dielectric Core for Sub-THz Signal Confinement
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Solution Overview
Problem
As frequencies increase in electronic components, signal lines become short enough to act as antennas, leading to signal radiation, and existing waveguides face challenges in efficiently transmitting high-frequency signals without interference or loss, particularly at sub-terahertz frequencies.
Innovation Solution
The development of metallic waveguides with dielectric cores and metallic claddings that utilize inkjet printing for fabrication, allowing for flexible and conformal designs with graded dielectric constants, which effectively confine sub-THz signals and reduce interference, while also being less expensive to produce than hollow metal waveguides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hollow metal waveguides are used to transmit high-frequency signals, then signal transmission capability is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The patent employs a composite structure consisting of a dielectric core material surrounded by a metallic cladding layer. This composite design combines the signal confinement advantages of dielectric waveguides with the protective and confining properties of metallic structures, achieving effective sub-THz signal transmission while using less expensive materials and simpler fabrication processes compared to traditional hollow metal waveguides.
2Productivity
If signal lines are made short to accommodate high frequencies, then device integration is improved, but signal radiation and interference increase
Solution Approach 1:
The patent utilizes a thin metallic cladding layer wrapped around a dielectric core to form a flexible waveguide structure. This configuration effectively confines electromagnetic fields within the waveguide, preventing signal radiation even when the waveguide is shortened for high-frequency applications. The metallic cladding acts as a shield that maintains signal integrity while allowing compact device integration.
3Ease of manufacture
If dielectric waveguides are used instead of hollow metal waveguides, then manufacturing cost is reduced, but signal confinement capability deteriorates
Solution Approach 1:
The patent creates a hybrid waveguide structure that combines dielectric and metallic materials. The dielectric core provides low-loss signal propagation, while the surrounding metallic cladding ensures effective field confinement. This composite approach overcomes the limitations of pure dielectric waveguides, achieving both cost-effectiveness and reliable signal confinement for sub-THz frequencies.
Solution Approach 2:
The patent applies different material properties to different regions of the waveguide structure. The inner dielectric core region is optimized for low-loss signal propagation, while the outer metallic cladding region provides strong field confinement. This local differentiation of material qualities allows each region to perform its specific function optimally, achieving both cost reduction and signal confinement.
4Device complexity
If waveguides are printed directly onto substrates, then packaging complexity is reduced, but alignment precision may deteriorate
Solution Approach 1:
The patent integrates the waveguide structure directly onto the substrate by printing the dielectric core and metallic cladding in situ. This merging of the waveguide and substrate into a single integrated structure eliminates the need for separate alignment and assembly steps, thereby reducing packaging complexity while maintaining manufacturing precision through direct fabrication processes.
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 solution enables efficient transmission of sub-THz signals with reduced radiation and interference, allowing for reliable communication paths between electronic devices, and simplifies packaging by printing waveguides directly onto substrates, mitigating alignment errors and cost considerations.
Implementation Method 1
Propagation in a dielectric waveguide may be viewed in the same way, with the waves confined to the dielectric by total internal reflection at its surface.
Implementation Method 2
metallic waveguides with dielectric cores and metallic claddings that utilize inkjet printing for fabrication, allowing for flexible and conformal designs with graded dielectric constants, which effectively confine sub-THz signals and reduce interference
Data Source
AI summary
A digital system has a substrate having a top surface on which a waveguide is formed on the top surface of the substrate. The waveguide is formed by a conformal base layer formed on the top surface of the substrate, two spaced apart sidewalls, and a top conformal layer connected to the base layer to form a longitudinal core region. The waveguide may be a metallic or otherwise conductive waveguide, a dielectric waveguide, a micro-coax, etc.