Particular Antennas and Problems

Abstract

The chapter treats particular antenna problems, namely, transparent antennas, ship antennas, rectangular loop, and ground resistance. A rigorous method to calculate a transparent antenna based on solving the integral equation for the current permits to develop the antenna design. An analysis of electrical characteristics of a rectangular loop shows how its pattern differs from that of a circular loop. An application of the theorem on the oscillating power enables to simplify and define more precisely the magnitudes of the monopole ground resistance. Section dedicated to ship antennas deals with specific difficulties in their designing and service, the influence of superstructures and other metal bodies on their electrical characteristics, and the creation of the main ship antenna with inductance-capacitance load.

Keywords: Antenna located flush with metal construction, Azimuth dependence on the near field, Electrical characteristics, Energy conservation law, Flat metal triangle, Ground resistance, Inductance-capacitance load, Integral equation for the current in a flat transparent antenna, Invisible antenna, Leontovich impedance boundary condition, Linear self-capacitance of a film, Low efficiency, Main ship antenna, Oscillating power, Propagation constant, Rectangular loop, Sheet resistivity, Ship antennas, Stray capacitance between the antenna and the mast, Thick superstructures, Transparent film, Upper and lower feeding, Weak dependence of input impedance on radiator length.