Asymmetric Aperture Array for Enhanced Measurement Sensitivity
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Solution Overview
Problem
Existing aperture array structures have limited measurement sensitivity, especially when analyzing small amounts of specimens, as the change in frequency characteristics is slight, making it difficult to detect specimen characteristics effectively.
Innovation Solution
The aperture array structure features apertures with a smaller opening area on one principal surface and a larger opening area on the opposing surface, with an acute angle between the surface and the inner wall, allowing the specimen to pass through the larger opening and enhancing electromagnetic field concentration, thereby increasing the change in frequency characteristics and measurement sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the opening area of apertures is made uniform on both surfaces, then the structure is simple to manufacture, but measurement sensitivity deteriorates when specimen amount is small
Solution Approach 1:
The aperture array structure employs asymmetric aperture design where the opening area on the first surface differs from the opening area on the second surface. Specifically, the aperture opening on the specimen-contacting surface is smaller than the opening on the opposite surface, creating an asymmetric geometry that concentrates electromagnetic fields at the aperture edges where the specimen is held, thereby enhancing measurement sensitivity for small specimen amounts while maintaining manufacturability through standard fabrication processes
2Power
If the aperture opening area is increased, then more electromagnetic waves pass through, but electromagnetic field concentration at the specimen location decreases
Solution Approach 1:
The aperture array structure implements local quality by creating apertures with non-uniform opening areas - the opening on the specimen-contacting surface is deliberately made smaller than the opening on the opposite surface. This local variation in aperture geometry concentrates electromagnetic fields at the aperture edges where specimens are positioned, enhancing field strength and measurement sensitivity in the critical specimen region while still allowing sufficient electromagnetic wave transmission through the larger opening on the opposite surface
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 design improves measurement sensitivity by concentrating the electromagnetic field near the aperture array structure's contact points, resulting in a greater change in frequency characteristics, enabling more accurate detection of specimens, even when the specimen amount is small.
Implementation Method 1
This design improves measurement sensitivity by concentrating the electromagnetic field near the aperture array structure's contact points, resulting in a greater change in frequency characteristics
Implementation Method 2
detecting frequency characteristics of the electromagnetic wave scattered by the aperture array structure
Data Source
AI summary
An aperture array structure used in a method of measuring characteristics of a specimen by applying an electromagnetic wave to an aperture array structure on which the specimen is held, and detecting frequency characteristics of the electromagnetic wave scattered by the aperture array structure. The aperture array structure includes a first principal surface, a second principal surface opposed to the first principal surface, and a plurality of apertures extending through the aperture array structure in a direction perpendicular to the first principal surface and the second principal surface. An opening area of each aperture at the first principal surface is smaller than an opening area of each aperture at the second principal surface.