Dielectric Spectrometry Probe with Integrated Calibration for Drift Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing dielectric spectroscopy devices using coaxial probes face challenges in maintaining measurement accuracy due to drift errors caused by environmental fluctuations and changes in sample temperature, leading to reduced reproducibility and calibration difficulties.
Innovation Solution
A dielectric spectrometry device with an integrated coaxial probe on a multilayer wiring board, incorporating an antenna, open, and short sections, along with a load part, allows for real-time calibration by sequentially connecting these components to a reflection measurement device, reducing drift errors through integrated calibration on a common substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coaxial probe is used for dielectric spectroscopy measurement, then the measurement can be performed non-invasively, but drift errors occur due to environmental fluctuations and sample temperature changes
Solution Approach 1:
The patent combines the calibration components (open, short, and load sections) with the measurement antenna into a single integrated probe structure fabricated on the same substrate. This merging eliminates the need for separate calibration procedures and ensures that the calibration components experience identical environmental conditions as the measurement antenna, thereby compensating for drift errors caused by temperature and environmental fluctuations.
Solution Approach 2:
The patent incorporates calibration sections (open, short, and load) directly into the probe structure before measurement. These calibration components are fabricated simultaneously with the measurement antenna on the same substrate, enabling preliminary calibration that accounts for environmental variations before actual measurements are taken, thus reducing drift errors.
2Measurement precision
If separate calibration components are used, then calibration can be performed, but the calibration process becomes complex and time-consuming
Solution Approach 1:
The patent integrates all calibration components (open section, short section, load section) and the measurement antenna into a single probe structure on one substrate. This merging simplifies the overall device structure and reduces the complexity of the calibration process, as all components are now part of a unified system that can be calibrated together in a single procedure.
3Reliability
If calibration is performed separately from measurement, then calibration standards can be maintained, but measurement reproducibility decreases due to environmental changes
Solution Approach 1:
The patent merges the calibration components and measurement antenna into the same physical structure on the same substrate. This ensures that both calibration and measurement experience identical environmental conditions, making the measurement results reproducible even when environmental conditions change, as the relative relationships between components remain constant.
Solution Approach 2:
The patent ensures that the calibration components and measurement antenna are fabricated on the same substrate with identical local properties (material composition, thermal expansion characteristics, etc.). This local uniformity ensures that environmental changes affect all components equally, maintaining measurement reproducibility while preserving calibration stability.
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 configuration enhances measurement accuracy by minimizing drift errors and enabling real-time calibration, facilitating broadband data acquisition despite environmental changes and sample state variations.
Implementation Method 1
the skin is irradiated with electromagnetic waves, the electromagnetic waves are absorbed by utilizing the interaction between blood components to be measured (for example, glucose molecules) and water
Implementation Method 2
the VNA 102 calculates a complex dielectric constant by measuring a reflection coefficient and a phase of the reflected wave reflected by the sample
Implementation Method 3
a plurality of coaxial line structures 110, 111, and 112 are formed on a dielectric substrate 10
Data Source
AI summary
In a sensor part of a dielectric spectrometry device, an antenna section of a coaxial line structure with an open end on a side that is to contact a sample, an open section of a coaxial line structure with an open end on a side that is to contact the air, a short section of a coaxial line structure in which a center conductor and a ground are conductive at a distal end portion, a load part which terminates a signal line, and a switch which selectively connects one of the antenna section, the open section, the short section, and the load part to a port of a reflection measurement instrument are formed on the same substrate.