Development of a Broadband Material Characterization Technique Robust to Sample Preparation and Calibration Errors
Abstract
New materials are continuously applied in the design of radio frequency (RF) components to improve their electrical and mechanical performances. In this context, an accurate measurement technique that is capable of characterizing the material’s electromagnetic (EM) constitutive parameters (i.e. permittivity and permeability) is called for. Conventional techniques often rely on closed-form formulas to determine the material properties from the measured responses. This limits the types of measurable material sample and also makes the result vulnerable to errors due to exhaustive sample preparation and calibration process. The current proposal investigates a new method to measure broadband material parameters based on comparing the measured responses to full-wave simulation data using an efficient rootsearching algorithm, thus eliminates the sample size or shape restrictions and the need of laborious calibrations. To accomplish the goal, a broadband test fixture will be designed and a finite element method based full-wave simulation tool will be used to accumulate accurate measurement and simulation data. In the material parameter retrieval process, an autonomous iterative solver will be implemented and used to minimize the error. Various material samples will be characterized and uncertainty analysis will be performed to validate the proposed technique.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Oct 20, 2022
- Source ID
- FA23861914063
Entities
People
- Jae-young Chung
Organizations
- Air Force Office of Scientific Research
- Seoul National University of Science and Technology
- United States Air Force