Microwave Dielectric Analyzer for Broadband Sheet Testing
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Solution Overview
Problem
Characterization of dielectric properties of sheet materials over a wide frequency range is expensive and time-consuming, affecting the performance of wireless antennas and printed circuit boards.
Innovation Solution
A microwave dielectric analyzer with parallel conductive electrodes and a computational model is used to non-destructively measure dielectric specimens, determining dielectric characteristics from 3 MHz to 6 GHz, utilizing a vector network analyzer and computational electromagnetic codes to correlate reflection coefficients with dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional characterization methods are used for dielectric properties over a wide frequency range, then measurement accuracy is maintained, but the process becomes expensive and time-consuming
Solution Approach 1:
The patent transforms the measurement approach by changing the frequency parameter usage - instead of performing separate measurements at each frequency point across the wide frequency range (3 MHz to 6 GHz), the system performs a single broadband measurement capturing all frequency information simultaneously through reflection coefficient measurement across the entire range, then uses computational electromagnetic codes to extract dielectric properties from this comprehensive data set
Solution Approach 2:
The patent replaces traditional mechanical/time-based sequential measurement systems with a computational system. Instead of physically adjusting and measuring at each frequency point separately, the system uses computational electromagnetic codes to model and extract dielectric properties from broadband reflection data, substituting computational processing for sequential physical measurement
2Productivity
If traditional characterization methods are used for dielectric properties, then comprehensive frequency range coverage is achieved, but the cost increases significantly
Solution Approach 1:
The patent creates a universal measurement system that can characterize dielectric properties across a wide frequency range (3 MHz to 6 GHz) using a single measurement apparatus configuration. The system uses a vector network analyzer connected to a measurement fixture with conductive electrodes that can measure reflection coefficients across the entire frequency spectrum simultaneously, eliminating the need for multiple specialized measurement setups for different frequency ranges
3Measurement precision
If non-destructive measurement methods are used, then specimen integrity is preserved, but measurement precision across wide frequency range becomes difficult to maintain
Solution Approach 1:
The patent adds a computational dimension to the measurement process. Instead of relying solely on direct physical measurements at each frequency point, the system measures reflection coefficients across the broadband frequency range and then uses computational electromagnetic codes to model and extract dielectric properties (permittivity, loss tangent) from this comprehensive frequency-domain data, achieving precise characterization across the entire frequency spectrum through this two-stage measurement-computation approach
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 efficient and accurate determination of dielectric properties of specimens, improving the characterization process and reducing costs while maintaining measurement precision.
Implementation Method 1
A microwave dielectric analyzer with parallel conductive electrodes and a computational model is used to non-destructively measure dielectric specimens, determining dielectric characteristics from 3 MHz to 6 GHz, utilizing a vector network analyzer and computational electromagnetic codes to correlate reflection coefficients with dielectric properties
Data Source
AI summary
Various examples related to microwave dielectric analyzers and their use are provided. In one example, a microwave dielectric analyzer includes a measurement apparatus having a conductive electrode that can couple to a microwave analyzer and processing circuitry that can determine a dielectric characteristic of the dielectric specimen using a reflection coefficient measured by the microwave analyzer. The dielectric characteristic can be determined using a computational electromagnetic model of the measurement apparatus. The reflection coefficient can be measured by the microwave analyzer with the dielectric specimen in contact with the conductive electrode and/or sandwiched between conductive electrodes. The conductive electrodes can be axially aligned, and the second electrode may not be coupled to the microwave analyzer.