COMBINED ANTENNA Russian patent published in 1998 - IPC

FIELD: antenna engineering; antennas for movable objects, such as ships. SUBSTANCE: antenna has line dipole 2 fed by power cable 5, and double-entry conical spiral 1 fed at point 3 by coaxial cable 4 routed inside one of conductors (entries) of spiral. Upper arm of line dipole is made in the form of rod and lower one, in the form of quarter-wave metal sleeve. Both arms and power cable are placed inside it along spiral antenna axis. EFFECT: reduced mutual effect of spiral antenna and line dipole, reduced size of combined antenna.