Wireless SAR Measurement Modules in Phantom
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional SAR measurement techniques are time-consuming, prone to errors, and difficult to accurately measure SAR across various frequencies and environments due to probe contamination and the need for frequent replacement of expensive tissue gels, while existing solutions struggle to maintain signal intensity and stability, especially with low-frequency measurements.
Innovation Solution
The method employs a phantom with measurement modules containing a control unit, memory, antenna, and a storage battery charged inductively, allowing for stable and intense signal measurement across a wide frequency range, eliminating the need for separate power sources and reducing contamination issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional probe measurement technique is used to measure SAR, then measurement can be conducted, but the process is very time consuming (three hours for single product) and requires frequent replacement of expensive tissue gel
Solution Approach 1:
The patent replaces the mechanical probe insertion and movement system with wireless measurement modules embedded in the phantom. The measurement modules communicate wirelessly with the external controller, eliminating the need for physical probe manipulation and significantly reducing measurement time while maintaining measurement capability.
Solution Approach 2:
The patent uses multiple measurement modules distributed throughout the phantom to simultaneously capture SAR data from different locations. This parallel measurement approach replaces the sequential probe scanning method, dramatically improving productivity and reducing the three-hour measurement time to a much shorter duration.
2Ease of operation
If probes are repeatedly inserted into and withdrawn from imitation tissue gel, then measurement can be conducted, but the imitation tissue gel is contaminated and cannot be used for long time requiring frequent replacement
Solution Approach 1:
The patent replaces mechanical probes that physically penetrate the tissue gel with wireless measurement modules embedded within the gel matrix. This eliminates the contamination issue caused by repeated probe insertion and withdrawal, ensuring the tissue gel maintains its properties throughout the measurement process and can be reused without frequent replacement.
Solution Approach 2:
The measurement modules are pre-embedded in the tissue gel before the measurement process begins. This preliminary placement ensures that the gel structure remains intact and uncontaminated during measurement, maintaining measurement consistency and reliability throughout the entire process without requiring gel replacement.
3Adaptability or versatility
If frequency signals with low level are used for measurement, then measurement can be conducted, but it is difficult to obtain desired driving power and signal intensity
Solution Approach 1:
The patent replaces passive probe-based measurement with active measurement modules that have embedded antennas and power management circuits. These modules can actively receive and amplify weak frequency signals, maintaining signal intensity across a wide frequency range including low-frequency measurements where conventional probes would fail due to insufficient driving power.
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 approach ensures reliable and precise SAR measurement with sufficient power, maintaining signal intensity even at low frequencies, and extends the lifespan of measurement modules by eliminating the need for frequent power source changes and reducing contamination.
Implementation Method 1
a storage battery charged inductively
Data Source
AI summary
Disclosed is an SAR measurement method that is capable of securing sufficient power within a short period of time and always maintaining the intensity of measurement signals irrespective of the measurement frequency. With the SAR measurement method, a plurality of measurement modules each with a control unit for processing location information and SAR measurement values, a memory unit for storing data, an antenna for making signal transception with the external, and a storage battery charged by way of inductive power are prepared. Thereafter, the plurality of measurement modules are arranged and installed within a phantom formed with a homogeneous material that conforms to the electrical characteristics of human body tissue. An electronic product to be measured in SAR is mounted at a predetermined location of the phantom with a predetermined posture. A high frequency of several hundred megahertz (MHz) to several hundred gigahertz (GHz) is scanned toward the phantom. The electronic product is operated with a predetermined pattern during a predetermined period of time. A measurement controller receives the data stored at the respective measurement modules to download and process the data, thereby verifying the SAR of the electronic product.