The ornamental design for an antennapedestal, as shown and described.
FIG. 1 is a right side elevation view of the new design;
FIG. 2 is a left side elevation view of the design shown in FIG. 1;
FIG. 3 is a perspective view of the design shown in FIG. 1;
FIG. 4 is another perspective view of the design shown in FIG. 1; and,
FIG. 5 is a front view of the design shown in FIG. 1.
The broken lines shown in the figures are included for the purpose of illustrating portions of the antenna pedestal and form no part of the claimed design. The rear of the antenna pedestal forms no part of the claimed design.