matlab program for RDRA

hello friend
i need matlab program for calculating far field , input impedance and returnloss curve of rectangular dielectric resonator antenna.
plz help me..............

hi friend, just put your equations in matlab it is very simple

thank you sir
but i need the equations for far field , input impedance and return loss curve for rectangular dielectric re4sonator antenna.
So plz provide me these derivation related to RDRA .
thank you

I am sory as i do not have these equations