How do i feed a slot antenna with a coax transmission line in hfss?

Hey peeps,

Trying to do this has consumed so much of my time.

Can anyone explain to me how best to feed a slot antenna with a coaxial transmission line, and how to investigate the correctness of the design.

Thanks in advance

Slot as in waveguide slot ?
Then, look at coax to waveguide transition first.

Thanks for your help.
But it is a slot on a planar ground - a simple slot antenna

was it helpful when tried the coax to slot conversion?