fidelity help pls

hi i have request,in that file of quasi yagi anenna at fidelity,i modify in the dimension but the result not same as HFSS,can u modify in it ,i want to ge s11<-10 db in (8-12 ghz),i ry to use enclosed port but he not accept it pls help

you should insert a rectangle as your ground plane at the bottom, the ports ground plane doesnt continue to the end of the design (its fidelity bug i think!, no way to continue it, just should add another rectangle at the location of groun plane). if you continue this rectangle to contact the bounderies, fidelity supposed that you have an infinite ground plane. you may use 2D Line (Z directed), to generate this rectangle.

marti

another thing, you should insert more cells between start and end parts of the co-ax port, this way the error message is not generated.
bytheway, i think localized ports are not so good for this especial design

marti