FIG. 1 is a front elevation view of a first embodiment of an antenna;
FIG. 2 is a top plan view.
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a bottom perspective view thereof;
FIG. 5 is a front elevation view thereof, with the base in broken line removed;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front elevation view of a second embodiment of an antenna;
FIG. 8 is a top plan view thereof;
FIG. 9 is a rear elevation view thereof;
FIG. 10 is a bottom perspective view thereof;
FIG. 11 is a front elevation view thereof, with the base in broken line removed;
FIG. 12 is a top plan view thereof;
FIG. 13 is a front elevation view of a third embodiment of an antenna:,
FIG. 14 is a top plan view thereof;
FIG. 15 is a rear elevation view thereof;
FIG. 16 is a bottom perspective view thereof;
FIG. 17 is a front elevation view thereof, with the base in broken line removed;
FIG. 18 is a top plan view thereof;
FIG. 19 is a front elevation view of a fourth embodiment of an antenna;
FIG. 20 is a top plan view thereof;
FIG. 21 is a rear elevation view thereof;
FIG. 22 is a bottom perspective view thereof;
FIG. 23 is a front elevation view thereof, with the base in broken line removed;
FIG. 24 is a top plan view thereof;
FIG. 25 is a front elevation view of a fifth embodiment of an antenna;
FIG. 26 is a top plan view thereof;
FIG. 27 is a rear elevation view thereof;
FIG. 28 is a bottom perspective view thereof;
FIG. 29 is a front elevation view thereof, with the base in broken line removed; and,
FIG. 30 is a top plan view thereof.
The broken lines showing a base represent environment and form no part of the claimed design.