March 2, 2023 at 1:43 pm
Praneeth
Ansys Employee

Hi Xinglong,

Thank you for reaching out to us.

Please see my observations / comments from your post:

  1. Did you check "infinte ground plane" while setting the PEC boundary condition in Case-1?
  2. Did you excite both the antennas for case-2? Please share the edit sources dialog box for case-2 simulation.

Please share screenshots of the simulation geometry and setup to help us serve you better.

Best regards,
Praneeth.