An effective approach is presented for simulation of thin resistive sheets in FDTD. The approach is based on surface impedance and piecewise linear recursive convolution technique. This approach can be combined with a conformal scheme so that it can be applied to deal with an arbitrarily shaped thin sheet. The simulation results for a couple of examples have shown that the approach is robust, stable and quite accurate.
This is a list of published papers and articles that reference our software.
Entries in Microwave Circuits (13)
This study was motivated by the RF, microwave and antenna industries to include passive and active circuits with measured S-parameters in the FDTD simulation. Recently, a passivity enforcement method based on an inverse eigenvalue method was proposed for transient circuit simulation (C.Saunders and M.Steer, IEEE Trans. Microwave Theory Tech., vol.99, no.11, 2011). In this paper, the passivity enforcement method is introduced to the electromagnetic simulation method FDTD to simulate circuit networks characterized by measured S-parameters together with other geometries such as antennas. Using XFdtd®, the simulation results for some examples showed that various methods, such as the Laplace transform, combined with the passivity enforcement method were quite accurate and robust. This combined FDTD and circuit method can be applied to simulate antennas together with these devices characterized by measured S-parameters.
Simulation can greatly enhance the design and prototype process when developing new products. This is especially true for the design of waveguide devices, such as a cavity filter, as the engineer can quickly calculate a number of key metrics leading to an optimal configuration. Through optimization via scripting, exceedingly fast processing using a GPU, and waveguide ports, this presentation demonstrates some of XF7’s features for the design, optimization, and analysis of waveguide devices.
A Conformal 2D FDFD Eigen Mode Method for Wave Port Excitation and S-Parameter Extraction in 3D FDTD Simulation
In this paper, a conformal 2D FDFD Eigen mode method is derived for solving arbitrarily shaped waveguides or transmission lines. Some examples such as horn antennas, circular waveguide filters and differential pairs are presented to show the capabilities of the developed conformal 2D FDFD Eigen mode solver.
Electromagnetic simulation has dramatically improved the design of a wide range of wireless systems by making it possible for engineers to simulate their operation and predict their performance without the need for building and testing of prototypes. But while a design concept can generally be simulated in far less time than it can be built or tested, simulation by itself still frequently requires modeling of a large number of alternatives without any assurance of achieving an optimized design. Researchers at the Computational Electromagnetics Research Laboratory at McMaster University, Hamilton, Ontario, have addressed this challenge by developing an efficient method for optimizing the design of wireless systems based on sensitivity analysis of the scattering parameters (S-parameters).