![fdtd yee cell fdtd yee cell](https://www.synopsys.com/content/dam/synopsys/optical-solutions/images/glossary-osg-fdtd-simulation-splitter.jpg)
The value of a stand is exported in *.sh3 files. Independently on the project units selected in the Input Interface they are re-expressed in millimetres for a stand determination.
#FDTD YEE CELL SOFTWARE#
The values of D x max, D y max, D z max are extracted from the actually generated mesh in case of AMIGO meshing or projects created with QW-AddIn for Autodesk Inventor Software or otherwise, are those set by the user in Mesh Parameters dialogue of QW-Editor. It is numerically equal to the (expressed in millimetres) smallest of the three largest allowed cell size values:Ī stand = min ( D x max, D y max, D z max) The value of a stand is determined for each project separately. Since a stand is a dimensionless parameter. In QW-Simulator these values are further normalised to bring them all around unity:
![fdtd yee cell fdtd yee cell](https://cdn.optiwave.com/wp-content/uploads/2013/09/FDTD-Numerical-representation-of-the-2D-computational-domain.jpg)
In the Input Interface, the user can draw his circuit in various possible units, but spatial dimensions are always exported to QW-Simulator (in *.sh3 files) in millimetres: D x, D y, D z.
#FDTD YEE CELL HOW TO#
Furthermore, efficiency of calculations is improved by operating in terms of line integrals of the fields, rather than the fields directly.īelow, the principles of field normalisation in QW-3D are summarised, explaining how to get the exact unnormalised field values.Į x, E y, E z, H x, H y, H z - physical field componentsĮ x, e y, e z, h x, h y, h z - variables representing the field components in the programĭ x', D y', D z' - normalised dimensions of FDTD cellsĪ stand - standard cell size for the project (the information about a stand can be read from Simulation Info tab of the Simulator Log window) For example, the variables representing the electric/magnetic fields are brought to the same order of magnitude by dividing/multiplying these fields by a square root of free space impedance. It should be remembered that in QuickWave the fields are normalised. The space arrangement of all six electromagnetic field components in the Yee’s cell is presented in Yee’s cell picture. In FDTD method the entire computational domain is divided into FDTD cells, based on the so-called Yee’s cell, in which different field components are defined in different space position. This facilitates direct monitoring of field values and evaluation of power and energy. The FDTD method emulates the electromagnetic field as a function of discretised space and time, in response to the user-defined excitation.