Dielectric Line High Permittivity Conductor Loss Reduction
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Solution Overview
Problem
Conventional dielectric lines for the 1-10 GHz frequency band are ineffective in reducing conductor loss, limiting the increase of unloaded Q in resonators and resulting in large-sized electronic components due to insufficient wavelength-shortening effects.
Innovation Solution
A dielectric line with a high first relative permittivity (1,000 or higher) for the line portion and a low second relative permittivity (lower than one-tenth of the first) for the surrounding portion, allowing electromagnetic waves to propagate within the 1-10 GHz frequency range, while incorporating a magnetic dielectric with a relative permeability of 1.02 or higher to enhance inductance and reduce resonant frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional transmission lines with conductor and dielectric combination are used, then electromagnetic waves can be transmitted in 1-10 GHz band, but conductor loss increases significantly due to skin effect at high frequencies
Solution Approach 1:
The patent replaces the conventional conductor-based transmission line with a dielectric line that utilizes the electric field distribution in a dielectric material to propagate electromagnetic waves. This substitution eliminates the conductor component entirely, thereby removing the source of conductor loss associated with the skin effect at high frequencies.
Solution Approach 2:
The patent changes the fundamental operating parameter from conductor-based current flow to dielectric-based electric field propagation. By using a dielectric material with high relative permittivity (1,000 or higher), the electromagnetic wave propagation mechanism is fundamentally altered to eliminate resistive losses in conductors.
2Volume of moving object
If conventional dielectric lines are used, then electromagnetic wave propagation is achieved, but wavelength-shortening effect is insufficient resulting in large-sized electronic components
Solution Approach 1:
The patent dramatically increases the relative permittivity parameter of the dielectric material to 1,000 or higher, which directly enhances the wavelength-shortening effect. The wavelength in a dielectric is inversely proportional to the square root of the relative permittivity, so this parameter change results in significantly shorter wavelengths and smaller component sizes.
Solution Approach 2:
The patent employs a composite structure consisting of a dielectric line portion and a surrounding dielectric portion with different relative permittivity values. This composite configuration optimizes both the wavelength-shortening effect and the electromagnetic field distribution to achieve compact component size while maintaining performance.
3Reliability
If multi-layer electrode structure is used to reduce conductor loss, then unloaded Q increases, but device complexity increases
Solution Approach 1:
The patent replaces the complex multi-layer electrode structure with a simpler dielectric line structure. By eliminating the need for multiple conductor layers and their associated assembly complexity, the invention achieves high unloaded Q through the dielectric propagation mechanism rather than through complex conductor configurations.
Solution Approach 2:
The patent extracts and removes the conductor component from the transmission line structure entirely, retaining only the dielectric portion. This extraction eliminates the need for complex multi-layer electrode arrangements while achieving the goal of reducing conductor loss and increasing unloaded Q.
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 proposed dielectric line configuration significantly reduces conductor loss, increases the unloaded Q of resonators, and miniaturizes electronic components by effectively propagating electromagnetic waves within the desired frequency range, achieving a higher wavelength-shortening effect.
Implementation Method 1
The line portion is formed of a first dielectric having a first relative permittivity. The surrounding dielectric portion is formed of a second dielectric having a second relative permittivity.
Implementation Method 2
JP 2013-045859A discloses a magnetic dielectric material that has good magnetic properties even in a GHz frequency band.
Data Source
AI summary
A dielectric line includes a line portion and a surrounding dielectric portion. The line portion is formed of a first dielectric having a first relative permittivity. The surrounding dielectric portion is formed of a second dielectric having a second relative permittivity. The line portion propagates one or more electromagnetic waves of one or more frequencies within the range of 1 to 10 GHz. In a cross section orthogonal to the direction of propagation of the one or more electromagnetic waves through the line portion, the surrounding dielectric portion is present around the line portion. The first relative permittivity is 1,000 or higher. The second relative permittivity is lower than the first relative permittivity.