HF comparative analysis of some LTCC technology materials by simulation methods

Glass-ceramic products for the LTCC technologies were analyzed in this paper from the point of view of their dielectric properties at high frequencies. A frequency domain of 2.4 - 18 GHz was considered, in microwave range, and our results are coming to complete the results obtained until now at lower frequencies. A detailed structural simulation was performed with help of the High Frequency Structural Simulator (by Ansoft), considering the internal structure of each class of material sample. Samples structural particularities impose the character of the HF field interaction with the material. The polarization level, indicated by the electric effective permittivity value evolves with frequency and temperature in agreement of these interaction mechanisms. The parametrical evolution of the electric permittivity was illustrated on graphs in the specified frequency range and for the temperature domain of 27 - 200degC, above the lamination temperature.