3d polar plot of log periodic antenna

i am new to hfss software.still learning it.so can you tell me if the 3-d polar plot is right ??

Getting sidelobes is quite normal, but having a main lobe out of the long axis looks dubious.

But guessing without knowing the geometry is somehow fruitless.

here is a picture of the antenna

Why do you plot E field and not the antenna gain?

I can't see the feed point, it should be at the "small" antenna end.

And get rid of the x-offset.