complex impedance matching

hi everybody!

i designed a 24 GHz patch antenna and the resonant frequency should be 24.125GHz . my problem is, at the frequency the ipedance is a complex one and i don't know how to match .

i need your help please

thanks a lot

If the impedance of the patch is complex, it means that the patch is not resonating.

You can change di dimension of your patch, or (not a good idea) you can add a stub at a good distance from the patch on the feeding line.

thanks for your answer.

do i understand that the impedance at the resonant frequency should be a real?

The perfect one should be real.and get more perfect S11