active input impedance of 5-element dipole phased array in HFSS

How does one obtain the active input impedance of a 5-element dipole phased array in HFSS?

I am using the Active Z measurement and plot re and im values. Is this correct?

When I do this I get different impedance values for each of the elements. Shouldn't the impedance values be symmetrical around the center array, for example:

Element 1 = 20 - 5i Ω
Element 2 = 30 - 7i Ω
Element 3 = 40 - 5i Ω
Element 4 = 30 - 7i Ω
Element 5 = 20 - 5i Ω


Thanks.