Microwave Ceramic Evaluation via Thermal Diffusion Correlation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for evaluating microwave characteristics, particularly in high-speed and compact multi-chip modules, face limitations in measuring low dielectric loss materials effectively, with existing techniques like Parallel Plate Resonance and TE Cavity Perturbation having minimum measurable dielectric loss of 1×10−5, and requiring expensive and sample-size restrictive setups, hindering the development of new microwave materials for advanced communication systems like 3G, 4G, and 5G.
Innovation Solution
A method involving linear regression to establish a mathematical relationship between thermal diffusion features and microwave characteristics, using techniques like Heat Flow Method to measure thermal diffusivity, allowing for quick evaluation of microwave dielectric loss in ceramic materials, such as Ba—Nb—W—O or Ba—Cu—Sr—Si—O systems, thereby reducing measurement costs and enabling faster selection of suitable materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional microwave measurement techniques (Parallel Plate Resonance or TE Cavity Perturbation) are used, then measurement accuracy is maintained, but the minimum measurable dielectric loss is limited to 1×10−5 and sample size requirements are restrictive
Solution Approach 1:
The patent replaces direct microwave measurement with thermal diffusion measurement. By measuring thermal diffusivity instead of directly measuring microwave dielectric loss, the method avoids the limitations of conventional microwave techniques regarding sample size and minimum measurable dielectric loss. The thermal measurement system is less restrictive about sample dimensions while maintaining measurement accuracy.
Solution Approach 2:
The patent changes the measurement parameter from microwave dielectric loss to thermal diffusivity. By establishing a correlation between thermal diffusivity and dielectric loss through linear regression, the method enables evaluation of microwave characteristics through thermal properties, thereby overcoming the measurement limitations of direct microwave techniques.
2Reliability
If conventional microwave measurement systems are used, then reliable microwave property data is obtained, but measurement cost increases and measurement speed decreases
Solution Approach 1:
The patent substitutes expensive and time-consuming microwave measurement systems with simpler thermal diffusion measurement systems. Thermal diffusivity measurements can be performed more quickly and at lower cost while the established correlation ensures reliable prediction of microwave dielectric loss characteristics.
Solution Approach 2:
The patent creates a predictive model (linear regression equation) that copies the relationship between thermal and microwave properties. This model allows rapid estimation of microwave characteristics from thermal measurements, eliminating the need for repeated expensive microwave measurements while maintaining reliability through the established mathematical relationship.
3Quantity of substance
If extensive microwave material evaluation is conducted using existing systems, then comprehensive material data is collected, but measurement expense increases significantly
Solution Approach 1:
The patent uses thermal diffusivity measurements as a proxy (copy) for microwave dielectric loss characterization. This approach allows evaluation of numerous materials at low cost by measuring thermal properties and using the established correlation to predict microwave performance, thereby enabling comprehensive material screening without prohibitive expenses.
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 enables rapid and cost-effective evaluation of microwave ceramic dielectric loss characteristics, addressing the need for new materials in 5G communication by correlating thermal diffusion with dielectric loss, facilitating the selection and development of microwave materials with improved insulation, reinforcement, and protection properties.
Implementation Method 1
measuring thermal diffusion features and microwave characteristics of at least three mode samples
Implementation Method 2
measuring thermal diffusion features and microwave characteristics of at least three mode samples
Data Source
AI summary
A method of evaluating microwave characteristics includes the steps of: (A) measuring thermal diffusion features and microwave characteristics of at least three mode samples to obtain at least three data points, wherein the mode samples include identical constituents but at different ratios thereof; (B) obtaining a mathematical relation between the data points by linear regression; (C) measuring a thermal diffusion feature of a sample under test, wherein the sample under test and the mode samples include identical constituents; and (D) substituting the thermal diffusion feature of the sample under test into the mathematical relation to evaluate a microwave characteristic of the sample under test. The method is applicable to a ceramic material to evaluate microwave characteristics of the ceramic material.