Hello Rete,
i really don't know if Desire have the antenna in the same place.
I think the logic componet are close but i think HTC have the same antenna hardware for all of his prodouct.
The antenna is, you can see in the photo, a small black cable whit, at his end, a really small "cloth button" ( it's the usual "gold" port used in for external gps ) and if is deconected it's easy to replug in his place.
Sorry for my english ;)