FIG. 1 is a front elevational view of an antenna showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a front, left perspective view thereof;
FIG. 8 is a top, front, left perspective view thereof;
FIG. 9 is a front, right perspective view thereof, shown in use with a pair of headphones; and
FIG. 10 is a front elevational view thereof, shown in use with a pair of headphones;
FIG. 11 is a front elevational view of a second embodiment of an antenna showing my new design;
FIG. 12 is a rear elevational view thereof;
FIG. 13 is a left side elevational view thereof;
FIG. 14 is a right side elevational view thereof;
FIG. 15 is a top plan view thereof;
FIG. 16 is a bottom plan view thereof;
FIG. 17 is a front, bottom, left perspective view thereof; and,
FIG. 18 is a rear, top, left perspective view thereof.
The claimed design is indicated by the relatively dark portions in the figures. The relatively light portions form no part of the claimed design.