AD-18/E is a wideband dipole mobile antenna with frequency range from 225 to 512 MHz, mainly intended for use in heavy duty mobile communications applications.
The antenna is composed of a radiator and base. The radiator is made of 43 mm diameter fiberglass whip with special radiating elements securely placed inside.  Electrically the antenna is designed as center-fed dipole antenna, thus the electrical characteristics are independent from the ground or mounting place.

The antenna base has four mounting holes equally spaced on a 4.5" (114.3 mm) circle which complies with NATO standard and can include an optional AD-79/18D GPS antenna. A stainless steel biconical spring absorbs the shocks and the vibrations, in addition protects the antenna against impacts.

AD-18/E has NSN 5985-42-000-0120

The antenna can be mounted on a mast using the ATP-1827/03 mast mount.