Waveguide Device With Porous Conductive Plates
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Solution Overview
Problem
Existing waveguide devices with continuous conductive surfaces are limited in applications due to manufacturing constraints and lack of flexibility, as they require uninterrupted metal coverage, which restricts their use in various electromagnetic wave confinement and propagation applications.
Innovation Solution
Incorporating holes, such as throughholes or dents, in the conductive members of waveguide devices, where the aperture diameter of these holes is smaller than the free space wavelength of the electromagnetic wave, allowing the devices to function as artificial magnetic conductors while reducing weight and enabling wider application ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If continuous conductive surfaces are used in waveguide devices, then electromagnetic wave confinement is maintained, but weight increases and manufacturing flexibility decreases
Solution Approach 1:
The patent applies porous materials by introducing holes (throughholes or dents) into the conductive members of the waveguide device. These holes create a porous structure in the conductive plates, reducing weight while maintaining electromagnetic wave confinement functionality. The aperture diameter of holes is controlled to be smaller than the free space wavelength of the electromagnetic wave to prevent leakage.
2Reliability
If continuous conductive surfaces are used in waveguide devices, then electromagnetic wave confinement is maintained, but manufacturing flexibility and application range are limited
Solution Approach 1:
The porous structure with controlled hole apertures enables the waveguide device to maintain its electromagnetic wave confinement function while becoming adaptable to various applications such as microwave chemical reaction devices and terahertz spectroscopic analysis devices that require weight reduction or specific structural characteristics.
3Weight of moving object
If holes are introduced in conductive members, then weight is reduced and application range is expanded, but electromagnetic wave leakage may occur
Solution Approach 1:
The patent applies parameter changes by carefully controlling the aperture diameter of the holes to be smaller than the free space wavelength of the electromagnetic wave. This parameter constraint ensures that the holes do not allow electromagnetic wave leakage while still achieving weight reduction. The specific dimensional parameter control maintains the functional integrity of the waveguide device.
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 introduction of holes maintains the functionality of waveguide devices as artificial magnetic conductors, enhances weight reduction, and allows for a broader range of applications, including microwave chemical reaction devices and terahertz spectroscopic analysis, while preventing electromagnetic wave leakage.
Implementation Method 1
An artificial magnetic conductor is a structure which artificially realizes the properties of a perfect magnetic conductor (PMC)... An artificial magnetic conductor restrains or prevents an electromagnetic wave of any frequency that is contained in the specific frequency band (propagation-restricted band) from propagating along the surface of the artificial magnetic conductor
Implementation Method 2
An electromagnetic wave of a wavelength which is contained in the propagation-restricted band of the artificial magnetic conductor propagates along the ridge, in the space (gap) between this conductive surface and the upper face of the ridge
Data Source
AI summary
A waveguide device includes a first electrical conductor including a first electrically conductive surface extending along first and second directions, a second electrical conductor including a second electrically conductive surface opposing the first electrically conductive surface, a waveguide located between the first electrical conductor and the second electrical conductor and extending along the first direction, the waveguide including an electrically-conductive waveguide surface opposing the first electrically conductive surface, and a plurality of electrically-conductive rod rows located on opposite sides of the waveguide, each rod row including a plurality of electrically conductive rods arranged along the first direction. At least one of the first electrical conductor and the second electrical conductor includes at least one hole.