Decoupled Antenna Array for Non-Invasive Analyte Detection
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Solution Overview
Problem
Current non-invasive analyte detection methods face challenges such as lack of specificity, interference from temperature fluctuations, skin compounds, and pigments, and complexity in device placement, particularly when measuring glucose in biological tissues.
Innovation Solution
A non-invasive analyte sensor system utilizing a detector array with decoupled antenna elements that can transmit and receive electromagnetic waves, employing different geometries and spacings to minimize direct signal interference, allowing for accurate detection of analytes using radio or microwave frequencies or visible light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple detector elements are used to transmit and receive signals, then detection accuracy is improved, but direct signal coupling between transmit and receive antennas increases causing interference
Solution Approach 1:
The detector array is segmented into multiple independent detector elements, each capable of being selectively controlled to function as transmit or receive elements. This segmentation allows for spatial separation and functional differentiation, reducing direct signal coupling while maintaining detection accuracy through multiple measurement paths.
Solution Approach 2:
A switch matrix is introduced as an intermediary component that selectively controls the connection between detector elements and transmit/receive circuits. This intermediary enables dynamic reconfiguration of signal paths, allowing the system to optimize detection accuracy while minimizing direct coupling interference through controlled signal routing.
2Object-affected harmful factors
If decoupled antenna elements with different geometries are used, then direct signal interference is minimized, but device complexity increases
Solution Approach 1:
Detector elements are designed with intentionally different geometries (e.g., different lengths, widths, or configurations) to create asymmetric electromagnetic coupling characteristics. This asymmetry ensures that direct signal paths between transmit and receive elements are minimized, as the geometric differences prevent efficient direct coupling while still allowing indirect coupling through the target medium.
Solution Approach 2:
Each detector element is designed to be multi-functional, capable of serving as either a transmit element or a receive element depending on switching configuration. This universality reduces the need for separate dedicated transmit and receive antennas, thereby managing device complexity while achieving decoupling through selective functional assignment.
3Ease of operation
If non-invasive detection methods are used, then patient comfort is improved, but detection specificity and accuracy decrease due to interference from temperature fluctuations, skin compounds, and pigments
Solution Approach 1:
The system employs periodic scanning routines that cycle through multiple detector elements in different transmit/receive configurations. By periodically switching between different element combinations and signal paths, the system can differentiate between signals originating from the target analyte versus interference from skin compounds, temperature fluctuations, or pigments, thereby improving detection specificity while maintaining non-invasive operation.
Solution Approach 2:
The switch matrix and control system implement feedback mechanisms that analyze signals from multiple detector elements and selectively amplify or filter based on detected patterns. This feedback processing helps distinguish analyte-specific signals from background interference, improving measurement precision while preserving the non-invasive nature of the detection method.
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 system enables precise detection of analytes by minimizing direct signal coupling between transmit and receive antennas, improving detection accuracy and specificity, and allowing for both invasive and non-invasive monitoring of analytes in various targets.
Implementation Method 1
transmit a generated transmit signal in a radio or microwave frequency range or a visible light range of the electromagnetic spectrum into a target containing an analyte of interest
Implementation Method 2
detect a response resulting from transmission of the transmit signal by the transmit detector element into the target
Implementation Method 3
the antennas, whether functioning as a transit antenna or as a receive antenna, are decoupled from one another which helps to improve the detection capability of the non-invasive analyte sensor
Data Source
AI summary
A method of detection of an analyte includes using a detector array having at least two detector elements that can emit electromagnetic waves, and selectively connecting a transmit circuit to any one or more of the at least two detector elements of the detector array. At least one transmit signal is generated using the transmit circuit, where the at least one transmit signal is in a radio or microwave frequency or visible range of the electromagnetic spectrum. The at least one transmit signal is transmitted into a target containing at least one analyte of interest using the one or more of the at least two detector elements connected to the transmit circuit. A receive circuit is selectively connected to a different one or more of the at least two detector elements of the detector array, and the receive circuit and the different one or more of the at least two detector elements of the detector array are used to detect a response resulting from transmission of the at least one transmit signal into the target containing the at least one analyte of interest.