Technical Capabilities:

Modeling Capabilities

CDS researchers use electromagnetic modeling to study fundamental phenomena of wave propagation in dielectric materials and dielectric-based devices, as well as for computer aided device design. For these purposes, a powerful electromagnetic field solver based on the Finite Difference Time Domain (FDTD) method is employed, which is one of the most versatile computational techniques presently available. As a time-domain solver of the Maxwell Equations, this method presents a space/time microscope, permitting the designer to visualize, with submicron/subpicosecond resolution, the dynamics of electromagnetic wave propagation. The FDTD technique is well suited for handling complex device configurations because it can conveniently model various inhomogeneities encountered in the structure. Simulation analysis is being applied to a wide range of devices, such as multilayer capacitors, microstrip resonators, bandpass filters, patch antennas, leaky wave antennas, and dielectric resonator antennas. FDTD simulations are shown to be very efficient for modeling wave processes in dual mode devices and in frequency selective surfaces made of dielectric matrixes with embedded inclusions of different permittivity or conductivity. Such phenomena as power leakage into space from microstrip lines and surface wave leakage into dielectric substrates that strongly affect microwave device performance are also being studied.