The ornamental design for an antenna for wirelesstag, as shown and described.
FIG. 1 is a front plan view of an antenna for wireless tag, showing our new design;
FIG. 2 is an enlarged portion view thereof, illustrating the region indicated by 2 in FIG. 1;
FIG. 3 is an enlarged portion view thereof, illustrating the region indicated by 3 in FIG. 1; and,
FIG. 4 is an enlarged portion view thereof, illustrating the region indicated by 4 in FIG. 1.
The broken lines in the drawings illustrate portions of the antenna for wireless tag that form no part of the claimed design. The dot-dash lines represent only the boundary between the claimed portion and unclaimed portions. All sides not shown form no part of the claimed design.