Variants of a mold are catalogued separately, so each one has its own sets and minifigs. Check these too if something you expect is missing here.

• 3961 Dish 8 x 8 Inverted [Radar], Solid Studs, Rounded Anti-stud Underside this part is a mold of it
• 18859pr0002 Dish 8 x 8 Inverted [Radar] with Hollow Studs and TIE Fighter Cockpit Print Print of this part