By late 1944 even single-seat USN radar-equipped fighters had an AIA 3 cm or AN/APS-6 3 cm radar in a closed dome.

http://www.ibiblio.org/hyperwar/USN/ref/NightFighterRadars/USNFRadar2.html

AIA radar:
[ATTACH=CONFIG]235386[/ATTACH]
[ATTACH=CONFIG]235387[/ATTACH]

AN/APS-6 radar:
[ATTACH=CONFIG]235388[/ATTACH]