Improved equivalent circuit modeling for RF components by the real-coefficient adaptive frequency sampling technique

In this paper, the real-coefficient version of Adaptive Frequency Sampling(AFS) technique is developed for efficient equivalent circuit modeling of RF components. This proposed method is advantageous over the vector fitting technique and the conventional AFS method in terms of fewer samples leading to a lower order of a rational function on a given data and direct conversion to an equivalent circuit for the PSPICE simulation, respectively. To validate the proposed method, the 3D field analysis data of a multilayered PCB is reduced to the equivalent circuit by the real-coefficient AFS and two data will be shown to agree.