Metamaterial Beamformer Structure for Low-Loss Wide-Angle Steering
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Solution Overview
Problem
Beamforming using metamaterials faces challenges such as increased insertion losses, complexity in fabrication, and size constraints due to the need for multiple layers and high-frequency operation, which complicates the manufacturing process and increases costs, especially in the 300-GHz band where commercially available components are unsuitable.
Innovation Solution
A beamformer utilizing a metamaterial cell made of conductive organic or nanocarbon materials with a nonconductive organic filling material, featuring variable capacitance elements that change the phase of electromagnetic waves through changes in inductance and capacitance, allowing for flexible, high-directivity beamforming with reduced insertion loss and simplified manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of metamaterial layers is increased to expand the steering region, then the phase variation range increases, but the insertion loss increases
Solution Approach 1:
The patent changes the material parameters by using organic conductive materials and nanocarbon materials instead of conventional metamaterials, which have different electromagnetic properties. This allows achieving the required phase variation range with fewer layers, thereby reducing insertion loss while maintaining adaptability
Solution Approach 2:
The patent employs composite material structures combining organic conductive materials, nanocarbon materials, and nonconductive organic filling materials. This composite approach optimizes the electromagnetic characteristics to achieve wide steering regions with reduced energy loss compared to traditional single-material metamaterial layers
2Speed
If the operating frequency is increased, then the beamforming performance improves, but the fabrication complexity increases due to smaller resonant cell dimensions
Solution Approach 1:
The patent changes the physical and chemical parameters of the materials used, specifically employing organic conductive materials and nanocarbon materials that maintain effective electromagnetic properties at higher frequencies without requiring proportionally smaller dimensions, thus relaxing fabrication tolerance requirements
Solution Approach 2:
The use of thin-film organic conductive materials and nanocarbon structures allows for scalable fabrication processes that can maintain precision at high frequencies without requiring complex manufacturing techniques, enabling easier fabrication despite increased operating frequencies
3Adaptability or versatility
If active elements are added for phase variation at high frequencies, then the beamforming capability improves, but the manufacturing process becomes complex and costly
Solution Approach 1:
The patent replaces the mechanical/electronic active elements (such as varactors and transistors) with passive organic conductive material structures that inherently provide phase variation capability through their electromagnetic properties. This substitution eliminates complex manufacturing processes including semiconductor fabrication, doping, high-temperature processing, and element transfer techniques
Solution Approach 2:
The patent changes the approach to phase variation by using material parameter changes in organic conductive materials and nanocarbon structures rather than electronic component adjustments. This allows achieving phase control through geometric and material property modifications that are compatible with standard fabrication processes
4Strength
If a flat and firm structure is used for metamaterial beamformer, then the structural integrity is maintained, but the overall size increases and flexibility is reduced
Solution Approach 1:
The patent employs flexible thin-film structures made of organic conductive materials and nanocarbon materials that can maintain structural integrity while being thin and adaptable. These materials inherently provide mechanical flexibility and structural strength without requiring bulky rigid supports, enabling compact integration
Solution Approach 2:
The composite material structure combining organic conductive materials, nanocarbon materials, and nonconductive organic filling materials creates a lightweight yet structurally sound configuration. This composite approach achieves structural integrity through material properties rather than increased size, allowing for compact and flexible beamformer designs
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 enables a flexible, high-directivity beamformer with low insertion loss and simplified fabrication, capable of wide-angle beamforming and efficient operation in the millimeter-wave band, overcoming the limitations of conventional metamaterial beamformers.
Implementation Method 1
the cell has an inductance and a capacitance, and a phase of the input electromagnetic wave is changed by a change of at least one of the inductance and the capacitance
Implementation Method 2
the cell has an inductance and a capacitance, and a phase of the input electromagnetic wave is changed by a change of at least one of the inductance and the capacitance
Implementation Method 3
the metamaterial makes it possible to steer an electromagnetic wave at a desired frequency by its unique properties such as a refractive index, a permeability, and a permittivity
Implementation Method 4
the metamaterial makes it possible to steer an electromagnetic wave at a desired frequency by its unique properties such as a refractive index, a permeability, and a permittivity
Data Source
AI summary
A beamformer of this invention is a beamformer configured to perform beamforming of an input electromagnetic wave and output an output electromagnetic wave, which includes a cell made of a metamaterial, and a filling material configured to fill a periphery of the cell. The metamaterial is made of a conductive organic material or a nanocarbon material. The filling material is made of a nonconductive organic material. The cell has an inductance and a capacitance. A phase of the input electromagnetic wave is changed by a change of at least one of the inductance and the capacitance.