Modeling And Application Research Based On LTCC Technology

RF engineers and packaging engineers are facing the challenges to make electronic products with high density, high stability and high functionality. Low Temperature Co-fired Ceramics(LTCC)technology is a technique to solve this problem.In this thesis, the characteristics of LTCC technology and modeling flow of LTCC process passive components are introduced. Based on the capacitor physical structure, a reconfigurable high frequency capacitor model is established and the formulas to calculate the model parameters are given. The model indicates that two-layer model of the equivalent circuit can be accurate at 4GHz, and the four-layer model accurate at 2GHz. By using S parameter, the modified-Πequivalent circuit of plane spiral inductor and the method of parameters extraction are established. The effective value of inductor, the coupling capacitor, the high-resistors and quality factor Q are analyzed with HFSS software under different conditions such as different line widths, spaces and loops. A corresponding model library which equivalent circuit can be accurate at 7GHz for LTCC plane spiral inductor is established to ADS software. A new filter design process which successfully applied to 4GHz low-pass filter is established by using the proposed capacitor and inductor model.