FIG. 1 is a top perspective view of a first embodiment of a horn antenna, in accordance with our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is a bottom perspective view thereof;
FIG. 9 is a top perspective view of a second embodiment of a horn antenna, in accordance with our new design;
FIG. 10 is a front view thereof;
FIG. 11 is a rear view thereof;
FIG. 12 is a left view thereof;
FIG. 13 is a right view thereof;
FIG. 14 is a top plan view thereof;
FIG. 15 is a bottom plan view thereof;
FIG. 16 is a bottom perspective view thereof;
FIG. 17 is a top perspective view of a third embodiment of a horn antenna, in accordance with our new design;
FIG. 18 is a front view thereof;
FIG. 19 is a rear view thereof;
FIG. 20 is a left view thereof;
FIG. 21 is a right view thereof;
FIG. 22 is a top plan view thereof;
FIG. 23 is a bottom plan view thereof;
FIG. 24 is a bottom perspective view thereof;
FIG. 25 is a top perspective view of a fourth embodiment of a horn antenna, in accordance with our new design;
FIG. 26 is a front view thereof;
FIG. 27 is a rear view thereof;
FIG. 28 is a left view thereof;
FIG. 29 is a right view thereof;
FIG. 30 is a top plan view thereof;
FIG. 31 is a bottom plan view thereof; and,
FIG. 32 is a bottom perspective view thereof.
The broken lines in the drawings depict parts of the horn antenna only and form no part of the claimed design.