Two feed pifa antenna on the same ground plane

Hi

Im designing a PIFA antenna and now considering to use two different antennas at the same ground plane for bandwidth enhancement at lower frequency.
Anyone knows how to get the return loss for overall radiation and what is the consideration to be made using hfss?

Thanks.

anyone out there can help?

Hi

are your antennas fed individually or together,if they are active(which i believe is the case). otherwise i dont think you would be here to ask the question of return loss.can you upload your file here so i can shed some light on it.

regards
Sajid Mohammed.