I have to design an antenna for s band radar application, I have selected the stacked patch antenna for this purpose. my boss is asking me to take into account the power requirements of s band radar as well, how can i do this along with other parameters of antenna
How about simply check on FCC / ETSI limitations for your product, and use nearly maximum allowed power. You can always attenuate. And, as it says somwhere on the net, "remember, gain is cheap!" =)