Material Characterization Using Iteration Method with Dual Cavities
Yen-ren Chen1*, Wei-syuan Wong1, Hsien-wen Chao1, Tsun-hsu Chang1
1Physics, National Tsing Hua University, Hsinchu, Taiwan
* presenting author:Yen-ren Chen, email:yrchen1988@gmail.com
Characterization of material properties in microwave band is very important in academic researches and industrial applications. Two specially designed cavities are employed to jointly determine the permittivity and permeability of the materials around the 2.45 GHz band. One of the cavities is operating at cylindrical quasi-TM010 mode where the sample is placed at the electric-field maximum sensitive to permittivity, while the other cavity is operating at a quasi-TEM mode where the sample is placed at the magnetic-field maximum sensitive to permeability. An iteration method is introduced to resolve the coupling between the electric and magnetic fields and to determine precisely the permittivity and permeability of the sample. Homemade composite materials will be tested.


Keywords: microwave, material characterization, resonant methods, iteration