Antelope is some of the best wild game meat I've had. So usually just about any preparation is good. Hard to beat a grilled medium rare backstrap steak.
However I cook it, I make sure its not cooked over medium. Medium rare is best. Always bring to room temp first. Usually just salt. I often make a nice sauce also (such as Steak Diane).
For steaks I make a marinade of worseterchire sauce, soy sauce, a shot of whiskey, and some minced garlic and let soak for at least an hour and grill up. And pepper upon pulling from the grill. Goes great with steamed vegetables.