The ornamental design for an aircraftantennabeaconlight, as shown and described.
FIG. 1 is a top perspective view of an aircraft antenna beacon light;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top plan view thereof.
The broken line showing of the aircraft antenna beacon light in FIGS. 1-7 are included for the purpose of showing environmental structure and form no part of the claimed design.