ABSTRACT
The chapter is devoted to shipborne antennas for radio communication. The chapter discusses the requirements to ship antennas of different ranges and the characteristics of antennas associated with the specific conditions of their installation on ships of different tonnage. The history of creation, design and characteristics of the antenna-mast with inductive-capacitive load, developed with the participation of the author of the book and used as the main ship’s antenna, is described. Various short-wave antennas, including telescopic and flat tape antennas, as well as an antenna with an absorber playing the role of a complex load, an antenna with capacitive loads, and folded antennas are considered. Antennas used in the decameter range are presented, in particular antennas for a buoy. A multi-tiered antenna is described, which has a directional pattern pressed to the ground in a wide frequency range.
The effect of ship metal structures on the electrical characteristics of antennas, including the closely located superstructure, as well as racks and brackets on which radiators are installed, and the effect of a metal trough mounted flush with the ship side on the characteristics of a radiator placed in it are examined in detail. Two superstructures located close to antenna exert maximum influence on its characteristics.
