probe length for dielectric resonator antenna excitation using hfss software

hi im simulating a dielectric resonator antenna using hfss softwar, the question is about antenna feeding, im using probe fed and i dont know how shoud i choose probe length
my guess is that shorter length probe give better return loss .
regards

Yes I believe dielectric loss can be indicated dB /cm using k * 10 log (loss tangent.)

yes thats right, but the question is about probe length sir.!
thanks

The probe length is generally chosen to be less than the height of the DRA, to avoid probe radiation. YOu might consider a stub on the other side for tuning the antenna. (Added) other side of DRA on same surface.

so interesting, your answer was so useful , thanks for your answer
regards