Librería Portfolio

Features

 Explores new methods of analysis of the antennas´ electrical characteristics, including methods based on the reduction of three-dimensional conical and parabolic problems to plane ones.

 Discusses methods for solving synthesis problems, e.g. determining parameters of the antenna with optimal electrical characteristics.

 Examines new types of antennas,particularly flat and three-dimensional self-complementary antennas with rotational symmetry, transparent antennas, and ecologically harmless cellular antennas.

 Evaluates new types of log-periodic and ship-borne antennas for different frequency ranges, involving the influence of superstructures and other metal bodies on their electrical characteristics.

Summary

The book deals with theoretical and experimental research of antennas. The presentation is based on the electromagnetic theory. It begins with the theory of thin antennas. Thin antennas represent one of the main types of radiators, thus the theory of thin antennas is the basis of the antennas analysis.

Special attention is paid to the integral equation of Leontovich-Levin for a current along a straight thin-walled metal cylinder, which is equivalent to the equation of Hallen with a precise kernel. Together with the analysis of various types of antennas, the book deals with the problems of synthesis including the creation a wide-band radiator by means of determining of the types and the magnitudes of concentrated loads, which are connected along a linear radiator and create in a given frequency band high electrical performance.

Problems of antenna engineering are discussed in the second half of the book, including the results of application of a compensation method for the protection of humans against irradiation and structural features of ship antennas.



Table of Contents

Questions of Antenna Theory. Theory of thin antennas. Integral equation method. New methods of analysis. Self-complementary antennas. Folded and multi-folded antennas. Multi-conductor cables and multi-radiator antennas. Antennas with concentrated loads. V-dipoles. Problems of Antenna Engineering. Antennas for a personal cellular phone. Director-type antennas. Other similar problems. Arrays. Transparent antennas. Ship antennas. Log-periodic antennas. Antennas for underground radio communication.