1.10  QW-V2D Projects

As an example of QW-V2D project a corrugated horn antenna considered in .\Antennas\corhorn\corhorn3.pro will be presented. The list of commands and toolbars are basically the same as in QW-3D. Here we will underline the specific features, interpretations and restrictions concerning QW-V2D projects.

The QW-V2D projects, axisymetrical two dimensional in cylindrical coordinates, also called Bodies of Revolution or BOR structures, are considered in cylindrical coordinates x,ρ,φ with the assumption that the dependence of fields on the coordinate φ is analytically known. Thus in fact we consider the structure in two dimensions x and ρ. In terms of FDTD meshing we have just one layer of FDTD cells reproducing the shape of the structure in the plane x, ρ (see upper left window). Thus that picture concerns half of the structure long section with the axis of symmetry situated at the bottom of the picture and represented by a thick broken line. The third dimension (with respect to φ) is always equal to 2π and in the 2D Windows is symbolically represented by the unitary height of the single layer of FDTD cells. That unitary size does not carry any information but formally can be represented in a 2D Window in ρ, φ or x, φ coordinates (see the lower left window). In the 3D Windows QW-Editor reproduces the actual 3D shape of the axisymmetrical structure. Although in reality the φ- coordinate always spans over the entire 2π angle, it can be visualised also with assumption of the user-defined span of φ (see right windows). Such a visualisation shows better the details of the cross section of the structure.

Here are some remarks concerning application of QW-Editor in QW-V2D projects:

·       basically most features and commands described for QW-3D in x, y, z coordinates are valid here for x, ρ, φ coordinates respectively,

·       the single layer of QW-V2D structure must be placed at the level of 0 and have a height 1 (if a structure of different level or height is defined it will be truncated to the levels from 0 to 1),

·       in x, ρ plane the structure cannot extend below the axis (ρ cannot be negative).

See also User Guide V2D for QW-V2D examples description.