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FROM THE PREFACE

Antenna engineering has developed into a highly specialized field of radio engineering which in turn is subdivided into many special branches. This treatise will deal with antennas made of wires, masts and towers for frequencies up to 30 megacycles.

TABLE OF CONTENTS

PREFACE

INTRODUCTION

CHAPTER 1: LOW-FREQUENCY ANTENNAS

1.1 Introduction

1.2 Low-frequency-wave Propagation

1.3 Low-frequency Antennas

1.4 Fundamental Frequency of a Straight. Uniform Vertical Radiator

1.5 Radiation Efficiency

1.6 Radiation Resistance

1.7 Characteristic Impedance of a Vertical Antenna

1.8 Antenna Reactance

1.9 Transmission Bandwidth of a Low-frequency Antenna

1.10 Multiple Tuning

1.11 Antenna Potential

1.12 Low-frequency Ground Systems

1.13 Low-frequency Directive Antennas

1.14 Reference Data on Certain Forms of Low-frequency Antennas

1.15 Structural Design

CHAPTER 2: MEDIUM-FREQUENCY BROADCAST ANTENNAS

2.1 Review of the Development of Broadcast Antennas

2.2 Prediction of Medium-frequency Coverage

2.3 Radiation Characteristics of a Vertical Radiator

2.4 Impedance of Uniform-cross-section Vertical Radiators

2.5 Ground Systems for Broadcast Antennas

2.6 Bandwidth of a Radiator

2.7 Input Impedance to Each Radiator in a Directive Array

2.8 Broadcast Antennas on Buildings

2.9 Antenna Potential

2.10 Aircraft Obstruction Lighting for Tower Radiators

2.11 A Single Vertical Radiator for Two Different Frequencies

2.12 General Equations for the Patterns of Multi-element Arrays of Vertical Radiators

2.13 Directive Antenna with Maximum Gain for Two Radiators

2.14 Directive Antennas Using Unequal-height Radiators

2.15 Directive Antennas for Wide Angles of Suppression

2.16 Producing Symmetrical Multiple-null Patterns

2.17 Parallelogram Arrays

2.18 Direct Synthesis of an Array for Any Specified Azimuthal Pattern

2.19 Distortion of Radiation Patterns Close to an Array

2.20 Stability of Directive Broadcast Arrays

2.21 Structural Details

CHAPTER 3: HIGH-FREQUENCY ANTENNAS

3.1 Review of High-frequency Antenna Development

3.2 High-frequency Propagation

3.3 Factors Affecting Signal Intelligibility

3.4 High-frequency Transmitting-station Sites

3.5 High-frequency Receiving-station Sites

3.6 Design of a Horizontal Half-wave-dipole Antenna System

3.7 Effect of Off-center Feed on Radiation Pattern of Dipole

3.8 Bandwidth of a Horizontal Half-wave Dipole

3.9 Folded Dipoles

3.10 Universal Antennas

3.11 Simple Directive High-frequency Antennas

3.12 Vertical Directivity of Stacked Horizontal Dipoles

3.13 Horizontal Directivity of Lines of Cophased Dipoles

3.14 Beam Slewing for Broadside Arrays

3.15 Radiation Patterns for Dipole Arrays

3.16 Suppressing Secondary Lobes

3.17 Power Distribution among the Half-wave Dipoles of an Array

3.18 Feeding Power to Dipole Arrays Using Half-wave Spacings

3.19 Input Impedance to Any Radiator in an Array of Dipoles

3.20 Fourier Current Distributions

3.21 Long-wire Antennas

3.22 V Antennas

3.23 Horizontal Rhombic Antenna

3.24 Fishbone Receiving Antenna

3.25 Traveling-wave Antenna for Vertically Polarized Transmission

3.26 Construction of High-frequency Antennas

CHAPTER 4: RADIO-FREQUENCY TRANSMISSION LINES

4.1 Propagation of Radio-frequency Currents in Linear Conductors

4.2 Useful Transmission-line Configurations and Their Formulas

4.3 Transmission-1ineDesignfor Wide-frequency Band

4.4 Transmission-line Impedance-matching Techniques

4.5 Network Equivalents of Transmission-line Sections

4.6 Balanced to Unbalanced Transformations

4.7 High-frequency Transmission-line Switching

4.8 Circle Diagram of a Transmission Line

4.9 Power-transmission Capacity of Open-wire Transmission Lines

4.10 Dissipation Lines

4.11 Measurement of Standing Waves on Open-wire Transmission Lines

4.12 Static Draining of Antenna Feeder Systems

4.13 Mechanical Construction of Open-wire Transmission Lines

CHAPTER 5: GRAPHICAL SYNTHESIS OF IMPEDANCE-MATCHING NETWORKS

5.1 Type I Problem

5.2 Type II Problem

5.3 Type III Problem

5.4 Type IV Problem

5.5 Calculation of Circuit Losses

5.6 Generalized Case of Impedance Transformation

5.7 Single-phase to Polyphase Transformations

CHAPTER 6: LOGARITHMIC POTENTIAL THEORY

6.1 One Wire above Ground

6.2 Two-wire Balanced Transmission Line

6.3 Systems in Which One or More of the Conductors Are Grounded

6.4 Application to Noncylindrical Conductors

6.5 Application to Antennas

6.6 Computation of Potential Gradients

APPENDIXES

I. General Bibliography on Antenna and Radiation Theory

II. Penetration of Earth Currents (Skin Depth) As a Function of Frequency and Ground Conductivity, with Inductivity of Unity

III. Mutual Impedances between Identical Vertical Radiators

IV-A. Chart of Radiation Patterns from Two Point Sources Having Equal Radiation Fields

IV-B. Chart of Angles of Nulls in the Function (S/2 sin β + Ф/2)

V-A. Tabulation of the Functions sin (S/2 sin Ф) and sin [S/2 sin (90 - Ф)]

V-B. Tabulation of the Functions cos (S/2 sin Ф) and cos [S/2 sin (90 - Ф)]

V-C. Tabulation of the Functions cos (90 sin ψ)/cos ψ and cos (90 cos θ)/ sin θ

VI. World Noise Zones and Required Minimum Field Strength for Commercial Telephone Communication

VII. Minimum Operating Signal-to-noise Ratios for Various Classes of Commercial Service in Telecommunication

VIII. Example of the Use of Directive Antennas for Minimizing Interference between Cochannel Medium-frequency Broadcasting Stations

INDEX

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