Wide-Range Antennas: 1st Edition (Hardback) book cover

Wide-Range Antennas

1st Edition

By Boris Levin

CRC Press

254 pages | 2 Color Illus. | 170 B/W Illus.

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pub: 2019-03-01
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Description

Expanding the range of antenna frequency is the main objective of this book. Solutions proposed are based on the development of new theoretical methods for analyzing and synthesizing antennas. The book shows that concentrated capacitive loads connected along linear and V-antennas provide a high level of matching with a cable over a wide frequency range and improves directional characteristics of antennas, i.e. increases the communication distance.

New theoretical methods are proposed for analysis and synthesis of antennas under consideration: 1) method of calculating directional characteristics of radiators with a given current distribution, and 2) method of electrostatic analogy for calculating mutual and total fields of complex multi-element radiating structures. These methods allow us to obtain optimal directional characteristics for director-type antennas (arrays of Yagi-Uda) and log-periodic antennas with concentrated capacitances and show that use of capacitors makes it possible to extend the frequency range of the director antennas and to decrease dimensions of the log-periodic antennas

Multi-element (flat and three-dimensional) self-complementary antennas with different variants of connecting generator poles and cable wires to antenna elements are proposed, which improves the matching with a cable. Characteristics of flat structures are compared with characteristics of volume structures: conical, parabolic, and located on a pyramid edges.

The book describes new versions of transparent antennas, antennas for cellular communication, multi-tier and multi-radiator antennas, and much more.

Table of Contents

Table of contents

Introduction

PART 1. WIDE-BAND ANTENNAS

Radiators 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 ANTENNAS

Electrically 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

 

 

 

 

 

About the Author

Boris Levin was born in Saratov, Russia, in 1937. He received a Ph.D. in Radio Physics in 1969 and Doctor of Sciences degree in Physics and Mathematics (Russian equivalent of Professorship) from S.-Petersburg Polytechnic University in 1993. From 1963 to 1998, he worked for the Design Department "Svyazmorproyekt" of the Russia Shipbuilding Ministry. He has been with the Holon Institute of Technology, Israel since 2008. Levin Boris has authored 7 books on antennas and electrodynamics, 4 of them in English, including "Antenna Engineering: Theory and Problems" (CRC Press, 2017), and 87 original articles in technical journals, 87 papers in proceedings of international scientific conferences, and has 45 patents.

Subject Categories

BISAC Subject Codes/Headings:
SCI086000
SCIENCE / Life Sciences / General
TEC041000
TECHNOLOGY & ENGINEERING / Telecommunications
TEC061000
TECHNOLOGY & ENGINEERING / Mobile & Wireless Communications