The ornamental design for an antennaelement, as shown and described.
FIG. 1. is a front perspective view of the front, right, and top sides of an antenna element showing our new design;
FIG. 2. is a front view thereof;
FIG. 3. is a rear view thereof;
FIG. 4. is a right side view thereof, a left side view being a mirror image thereof;
FIG. 5. is a top plan view thereof;
FIG. 6. is a bottom view thereof; and,
FIG. 7. is a reference view of usage.
The broken lines of the antenna element shown in FIGS. 1-6 form no part of the claimed design.
The broken lines of the antenna element shown in FIG. 7 form no part of the claimed design and the remaining broken lines shown in FIG. 7 illustrate environmental subject matter and form no part of the claimed design.