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The right vertical stabilizer of NASA's F/A-18 Systems Research Aircraft now sports a green fiberglass end cap. A new "Smart Skin" antenna mounted inside the cap showed remarkable results in its first flight tests at NASA's Dryden Flight Research Center, Edwards, California.
The flight tests of the new antenna system demonstrated a five-fold increase in voice communications range and a substantial improvement in the pattern of radiation and quality of transmission compared to the standard dorsal blade antenna on the aircraft.

The Smart Skin antenna system was electrically as well as physically connected to the airframe, making the aircraft skin operate as an antenna along with the antenna itself. The concept was developed by TRW Avionics Systems Division and integrated into the F/A-18's vertical fin by Northrop-Grumman Corporation.