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MatLab implementation of the FDTD method for microstrip structures modelling

In the present work the basics of the Finite Differences in the Time Domain Method (FDTD) are analyzed, absorbent boundary conditions are implemented and conditions for their convergence and stability are introduced. To evaluate the advantages of the use of FDTD method a microstrip antenna is modeled using MatLab environment and the normalized power pattern diagram is determined using as reference the results obtained with the professional software of simulation CST Microwave Studio and the Biortogonal Sampling in the Time Domain Method (SBTD).