I am trying to design a vivaldi antenna in CST microwave studio. I am trying to do draw an analytical curve with equations u(t)= t, v(t)= s*exp(r*t), w(t)= 0. Parameters are as follows s= 1mm, r = 1.1 and Parameter range (max) = 52.5mm. But I am getting an error that 'Body size is outside dynamic range of 3D modeler' . 5 cm is too big for the 3 modeler? What's the problem?