Composite Right-Left Handed Line Structure for Reverse Frequency Bands
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Solution Overview
Problem
Conventional line devices for propagating magnetic waves are limited in their frequency characteristics, as they follow either right-handed or left-handed systems, restricting their applications in miniature antennas and other applications where reverse frequency characteristics are needed.
Innovation Solution
A composite right/left-handed line device is designed with alternating layers of electrodes, dielectric substances forming capacitors in series, and magnetic substances forming inductors in parallel, allowing for the creation of a small-size device that can operate in both right-handed and left-handed systems by selecting suitable materials and determining their shapes based on capacitive and inductive requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional right-handed line system is used, then the device structure is simple, but the frequency characteristics are limited and cannot achieve reverse frequency characteristics
Solution Approach 1:
The patent combines right-handed and left-handed line systems into a single composite structure. The right-handed system includes series inductance L1 and parallel capacitance C1, while the left-handed system includes series capacitance C2 and parallel inductance L2. These two systems are merged in a distributed constant circuit to achieve both right-handed and left-handed frequency characteristics simultaneously, enabling the device to operate across broader frequency ranges including reverse frequency characteristics.
Solution Approach 2:
The patent uses composite material structures where dielectric substances and magnetic substances are combined in specific configurations. The dielectric substances form capacitive elements while magnetic substances form inductive elements, creating a composite structure that exhibits both right-handed and left-handed electromagnetic properties. This composite approach enables unique frequency characteristics including band-pass characteristics near 9 GHz.
2Adaptability or versatility
If a left-handed system is used to achieve reverse frequency characteristics, then the frequency adaptability is improved, but the device size increases
Solution Approach 1:
The patent transitions from planar arrangements to three-dimensional stacked configurations. Multiple layers of electrodes, dielectric substances, and magnetic substances are arranged in the thickness direction, creating a vertical stacking structure. This dimensional change allows the device to achieve compact form factor while incorporating multiple functional layers that provide both right-handed and left-handed characteristics, thus reducing overall device size.
Solution Approach 2:
The patent implements a nested structure where dielectric substances are placed between electrode plates and magnetic substances are disposed adjacently to the dielectric substances. Each layer is nested within the overall device structure, with electrodes, dielectric materials, and magnetic materials interlocked in a compact arrangement. This nesting approach maximizes space utilization and achieves miniaturization while maintaining the required electromagnetic functionality.
3Manufacturing precision
If the number of layers is increased to adjust capacitance and inductance values, then the frequency characteristic precision is improved, but the device complexity increases
Solution Approach 1:
The patent creates an adjustable and scalable structure where the number of layers can be varied to tune the capacitance and inductance values. By dynamically adjusting the layer count, the device can be optimized for different frequency ranges and applications. The modular layered design allows flexible configuration without requiring complete redesign, thus managing complexity through standardization.
Solution Approach 2:
The patent divides the device into discrete, repeatable layers consisting of electrodes, dielectric substances, and magnetic substances. Each layer functions as an independent unit that can be manufactured separately and then assembled. This segmentation allows precise control over capacitance and inductance values by simply adding or removing layers, making the tuning process systematic and manageable rather than requiring complex adjustments within each layer.
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 enables the formation of a compact device with band-pass characteristics, specifically exhibiting left-handed transmission regions, enhancing frequency versatility and applicability in miniature antennas and matching circuits.
Implementation Method 1
The plurality of dielectric substances are interposed between opposite surfaces of the pairs of electrode plates of adjacent two of the electrodes
Implementation Method 2
The plurality of magnetic substances are interposed between opposite surfaces of the connection pieces of adjacent two of the electrodes
Implementation Method 3
a line propagating a magnetic wave serves as an equivalent circuit in which series inductance (L) components and parallel capacitance (C) components with respect to the line are connected continuously
Data Source
AI summary
A composite right/left-handed line device includes plural electrodes, plural dielectric substances and plural magnetic substances. The plurality of electrodes each include a pair of electrode plates, and a connection piece connected to the pair of electrode plates. The plurality of electrodes are disposed at regular intervals in a thickness direction between a pair of input terminals and a pair of output terminals. The plurality of dielectric substances are interposed between opposite surfaces of the pairs of electrode plates of adjacent two of the electrodes. The plurality of magnetic substances are disposed adjacently to the dielectric substances, respectively. The plurality of magnetic substances are interposed between opposite surfaces of the connection pieces of adjacent two of the electrodes.