Wide-range and multi-frequency antennas

Description

Content: Table of contentsIntroductionPART 1. WIDE-BAND ANTENNASRadiators with distributed loads Radiators with non-zero (impedance) boundary conditions. Constant surface impedance An impedance long line as an approximate analog of an impedance radiator Radiator with a surface impedance varying as coordinates function along its length How mistakes are created Radiators with concentrated loads Capacitive loads. An in-phase current distribution along a radiator Creating in-phase current using a method of an impedance line Creating in-phase current using a method of a metallic long line with loads Optimization of antenna characteristics Solved problems Optimal matching of linear radiators with constant capacitive loads Creating a required current distribution in a given frequency range Reducing an influence of nearby metal superstructures An optimal matching of V- radiators with constant capacitive loads Directional characteristics of radiators with capacitive loads Calculating the directional patterns of radiators with a given current distribution Method of electrostatic analogy Decreasing dimensions of log-periodic antennas Adjustment of characteristics of self-complementary antennas Volume self-complementary radiators Self-complementary radiators on a conic surface Self-complementary radiators on a parabolic surface Antenna on a pyramid Edges Self-complementary antennas with rotation symmetry Flat antennas Procedure of calculating flat self-complementary antennas Three-dimensional antennas with rotation symmetry PART 2. MULTIFREQUENCY ANTENNASElectrically related long lines, parallel to metal surface. Multiconductor structures of wires with identical wires. Meandering loads of wire antennas Voltages and currents in meandering loads. Folded antennas, perpendicular to metal surface. Symmetrical structure. Structures with wires of different length and diameters. Losses in the ground. Impedance folded radiators Multi-folded antennas, perpendicular to metal surface. Principle of operation and method of calculation Electrical characteristics of multi-folded radiators Using multi-folded radiators in compensation devices Multi-wire and multi-radiator antenna Multi-wire antenna. Multi-radiator antenna. Multitiered and log-periodic coaxial antennas Multitiered antenna Log-periodic coaxial antennas Different Issues. Antenna with arbitrary single load. Transparent antennas. Field of a rectangular loop References Index