chapter  13
21 Pages

Ship Antennas

WithBoris Levin

This chapter discusses the separate issues of designing ship antennas. They are representatives of numerous groups of antennas deployed on mobile objects and as such have their own specific features, since they are placed in constrained conditions in close proximity to metal bodies of different shapes and dimensions. The system of whip antennas creates the capacitive component of the load and the double-turn volumetric spiral creates the inductive component of it. Both elements decrease the input reactance of the antenna and increase its effective length. The antenna-mast with inductive-capacitive load was proposed in 1966 and was improved in 1970. The specimen of antenna was mounted on the board of cargo ship Konstantin Shestakov with displacement 3500 ton. An antenna for coast radio centers provides a communication with the ships in the ranges of high and medium frequencies. A project of antenna was developed on the basis of the theory of self-complementary antennas in two versions— planar and volumetric.