Microwave Reflectometry for Electronic Device Authentication
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Solution Overview
Problem
Counterfeit, tampered, or substandard electronic devices pose significant risks due to variability in properties such as shape, size, and electronic characteristics, making it challenging to determine their acceptability for use.
Innovation Solution
The use of microwave reflections to generate unique electromagnetic signatures for devices, allowing comparison with reference signatures to evaluate their authenticity and acceptability, employing a system with a probe, measuring instrument, and processor to measure and analyze the reflection coefficients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional inspection methods are used to determine device authenticity, then the inspection process can detect obvious differences, but the process becomes time-consuming and cannot quickly evaluate devices with subtle variations in properties
Solution Approach 1:
The patent replaces conventional mechanical or manual inspection methods with electromagnetic wave-based measurement. A microwave signal is transmitted through the device package, and the transmitted signal is compared to a reference signal to generate a metric that indicates device authenticity. This substitution enables rapid, automated inspection while maintaining high detection accuracy for subtle property variations.
Solution Approach 2:
The patent changes the measurement parameter from external physical properties (shape, size, visual characteristics) to electromagnetic transmission properties. By measuring how the device package transmits microwave signals and comparing this transmission characteristic to a reference, the system can quickly and accurately detect both obvious and subtle differences in device properties, including internal structure variations.
2Measurement precision
If detailed property measurements are performed to accurately determine device acceptability, then detection accuracy improves, but the complexity of the inspection system increases
Solution Approach 1:
The patent extracts only the essential information needed for authenticity determination by measuring a single transmission metric between a reference signal and a signal transmitted through the device. This extracted metric captures the combined effect of multiple device properties (package material, internal structure, component placement) without requiring separate measurements of each property, thereby simplifying the inspection system while maintaining detection accuracy.
Solution Approach 2:
The patent creates a universal inspection method that can evaluate various device types and property variations through a single measurement approach. The transmission metric comparison technique works across different device packages and configurations, eliminating the need for multiple specialized measurement systems and reducing overall system complexity.
3Measurement precision
If multiple measurement parameters are used to evaluate device properties, then detection accuracy improves, but the measurement time increases
Solution Approach 1:
The patent merges multiple device property evaluations into a single transmission metric measurement. By transmitting a microwave signal through the device package and comparing the transmitted signal to a reference, the system simultaneously assesses package material properties, internal structure, component placement, and other characteristics in one integrated measurement, thereby maintaining detection accuracy while minimizing measurement time.
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 rapid and accurate differentiation between authentic and counterfeit devices, even in a 'powered-off' state, using statistical metrics like root-mean-square error to determine acceptability and detect minor changes.
Implementation Method 1
The antenna receives an electromagnetic field reflected from the electronic device. The reflected electromagnetic field has a magnitude and a phase that differ from a magnitude and a phase of the transmitted electromagnetic signal.
Implementation Method 2
A measuring device measures a complex reflection coefficient as a function of frequency of the received electromagnetic field referenced to the antenna.
Data Source
AI summary
Utilizing microwave reflections to compare a reference device with counterfeit and/or aging devices under test. The reflection from the device under test varies based on certain properties, which results in each device having a unique and intrinsic electromagnetic signature. Comparisons of the electromagnetic signature of the device under test to the electromagnetic signature of a reference device enable evaluating the acceptability of the device under test.