small dipole antenna simulation using CST microwave studio

hello, I have done the simulation of small dipole using CST microwave studio. The photo of E-field plot is attached.

1. can anyone help check if it is correct? I know that small dipoe only has E field in theta direction; it should be zero in the phi and r direction of a spherical coordinates. Does my graph show that? I am confused because I see nonzero E field when in Phi direction or I may see wrongly?

2. Is the E field plot normalized by default?

3. How can i derive the input impedance from my CST simulation?

I really appreciate your help!