EM.Cube FAQ
EM.Cube FAQ
What formulae are used while calculating the radiation patterns, and other parameters like gain, directivity
The Far-Field Approximation for Radiation & Scattering Problems at:
what is meant by LCS settings?
EM.Cube provides a number of different coordinate systems. The two most important ones are the World Coordinate System (WCS) and the Local Coordinate System (LCS). Every object has a Local Coordinate System that determines the location of the object in the world coordinate system and its orientation, i.e., its rotation angles with respect to the world principal axes. The center of the local coordinate system is the most important characteristic point of an object. The position of the LCS center varies among different object types. For example, the LCS center of a box is the center of its bottom face, while the LCS center of a sphere is its true geometrical center. The LCS has three local X-, Y-, and Z-axes. For most objects, these axes line up with the object's natural axes. For example, the local Z-axis of a cylinder or a cone is always aligned along its geometrical axis. For further information please see the "Local Coordinate System" section at:
How can we include different materials/metals and their properties in predefined arrays?
For simplicity, in our tutorials we use wizards to create antenna for a project. However, one can starts project from scratch and include different materials/metals with their properties in their design and then use the "Array Tool" from the tool bar to create an array. We may not need to use wizards for a complicated design.
How do we change the element spacing in line arrays?
If you start your project from scratch and use "Array Tool" to create say a 3 x 3 array with 5 mm spacing, simply set Element Count for X, Y and Z to 3, 3 and 1 respectively, and Spacing to 5, 5, and 0 for X, Y, and Z respectively, in Array Properties dialog window as indicated in the attached figure.
However, if you use a wizard, the Spacing might be parameterized in terms of other variables. For instance, in EM.Libera's Tutorial Lesson 2, In in Array Properties dialog window the Element Count for X, is expressed as direct_spacing_lambda and X Spacing is defined in terms of n_direct. To change X Element Count = 50 and X Spacing = 7 you may simply replace n_direct with 7 and direct_spacing_lambda with 50.
Alternatively, it is suggested, to keep n_direct and direct_spacing_lambda in the Array Properties dialog window untouched, yet, change their values from the Variables dialog window.
