The ornamental design for an antenna for wirelesstag, as shown and described.
1. Antenna for wireless tag
1.1 : Top view, the Bottom view being a mirror image thereof
1.2 : Partial enlargement taken from the top view of reproduction 1.1
The portions shown in solid lines are the portions for which the design registration is sought; the portions shown by means of dashed broken lines illustrate portions of the article that form no part of the claimed design; the dashed-dotted broken lines illustrate boundaries of the claimed designs and form no part thereof; the front view, the back view, the left view, and the right view are omitted because the product is a two-dimensional physical product; the bottom view is omitted because it is a mirror image of the top view; reproduction 1.2 is a partially enlarged top view showing the middle portion of the claimed design shown in reproduction 1.1.