Solid Phantom Device for High-Frequency Electromagnetic Dosimetry
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Solution Overview
Problem
Current electromagnetic dosimetry methods are inadequate for measuring exposure to high-frequency electromagnetic waves above 6 GHz, as existing 'phantoms' either degrade quickly or are expensive and impractical for simulating human tissue properties accurately at these frequencies.
Innovation Solution
A device with a substrate carrying a metallized or non-metallized shield and a dielectric material layer, featuring calibrated openings, is used to simulate human tissue characteristics, equipped with sensors to measure electromagnetic radiation, allowing for accurate exposure assessment at frequencies above 6 GHz.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid phantoms are used to simulate human tissue, then the simulation of dielectric properties is improved, but the longevity and stability of the phantom deteriorates due to water evaporation
Solution Approach 1:
The patent changes the physical state of the phantom material from liquid to solid, specifically using a solid phantom material that maintains stable dielectric properties without evaporation. This parameter change resolves the contradiction by eliminating the evaporation issue while maintaining the simulation accuracy of human tissue properties.
Solution Approach 2:
The patent employs composite materials in the solid phantom construction, combining materials with specific dielectric properties to match human tissue characteristics. This allows the phantom to maintain both simulation accuracy and long-term stability, resolving the contradiction between reliability and longevity.
2Duration of action of stationary object
If solid phantoms are used to simulate human tissue, then the longevity and stability are improved, but the manufacturing cost and complexity increases
Solution Approach 1:
The patent changes the manufacturing parameters by using 3D printing technology with accessible materials, reducing the manufacturing cost and complexity compared to traditional solid phantom fabrication methods. This resolves the contradiction by maintaining longevity while improving ease of manufacture.
3Ease of operation
If sensors are positioned outside the phantom, then the measurement setup is simplified, but the measurement precision of electromagnetic radiation exposure deteriorates
Solution Approach 1:
The patent embeds sensors within the phantom structure itself, creating a nested configuration where the sensing elements are integrated inside the phantom material. This allows direct measurement of electromagnetic radiation exposure at the phantom's internal locations, improving measurement precision while the phantom's external surface remains accessible for simplified setup.
Solution Approach 2:
The patent uses the phantom material itself as an intermediary medium that both simulates human tissue properties and houses the sensing elements. This intermediary approach allows the phantom to serve dual purposes: simulation and measurement, resolving the contradiction between setup simplicity and measurement precision.
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
Enables precise measurement of electromagnetic radiation exposure and absorption rates in human tissues at high frequencies, overcoming the limitations of existing phantoms by providing reliable and cost-effective simulation of tissue properties.
Implementation Method 1
a thickness (layer) of a dielectric material disposed on and/or under the substrate (preferably under the substrate)
Implementation Method 2
a shield comprising one or more conductive materials, metallized or not
Data Source
Figure 1~2
AI summary
The invention relates to a device (A) for simulating characteristics of human tissues in electromagnetic dosimetry, the device (A) comprising a substrate (S) carrying a metal shielding (MSH), and a layer (DL) of a dielectric material arranged on or preferably beneath the substrate (S), the device (A) also comprising a plurality of openings (OSH) made in the shielding (MSH) and at least one array (SA) of sensors (SENS) in the layer (DL) of dielectric material.