How to feed a center-fed dipole in Microstripes 7?

Using a microstrip balun.

Can you explain more details? Now, I am using a wire port as the excitation. Is that correct?

I don?t know how good is the current distribution from unbalanced to balanced using a wire fed port, but I know that using a balun the current distribution is almost perfect.
Here are a few examples how to feed a microstrip dipole using baluns
http://www.ee.olemiss.edu/atef/journ...trip%20Fed.pdf
http://www.ee.kth.se/php/modules/pub...SB-EX-0516.pdf