Radiowave Propagation and Antennas for Personal Communications, Third Edition

Kazimierz Siwiak and Yasaman Bahreini

Artech House

Description

This newly revised and expanded edition of the Artech House classic, Radiowave Propagation and Antennas for Personal Communications, offers you a current and comprehensive introduction to the practice and underpinnings of personal communications. Every chapter has been updated to explain how the latest ultra-wide band technology affects all aspects of personal communications. The third edition covers important innovations such as wireless local networks, personal networks, and MIMO techniques. This practical resource emphasizes three distinct but interrelated problems: fixed site antennas, radiowave propagation, and small antennas used close to the human body. Giving you the systems level view of design and analysis, the book helps you solve propagation problems in large-scale urban settings, in-building settings, and in the personal area space. In addition to its accessible coverage of technology and theory, this unique volume examines how radio waves and wireless devices affect the human body.

Table of Contents

Introduction

Introduction and Historical Perspective (including UWB systems)

Personal Communications

Electromagnetic Fundamentals

Basic Radiowave and Antenna Parameters

Summary

References

Problems

Fixed-Site Antennas

Introduction

Antennas as Arrays of Current Sources

Pattern Multiplication and Array Factor

Collinear Antennas and Vertical Plane Pattern Control

Directivity and Beamwidth for Omnidirectional Antennas

Array Antennas

Pattern Shaping of High Gain Collinear Antennas

Multiple Beam Antennas

Proximity Effects in Fixed Site Antennas

Summary

References

Problems

The Radio Communication Channel

Introduction

Guided Waves

Basic Radiowave Propagation

Wave Polarization

Summary

References

Problems

The Radio Frequency Spectrum

Introduction

ELF and VLF: Extremely Low and Very Low Frequencies (<30kHz)

LF: Low and Medium Frequencies (30 kHz - 30 MHz)

HF: High Frequencies (3 MHz - 30 MHz)

VHF and UHF: (30 MHz - 3GHz)

Above UHF: 3GHz and Higher

Picking an Optimum Operating Frequency

Multiple-user communications Systems, Voice systems, LANs, PANs and UWB Systems

Summary

References

Problems

Communications Using Earth-Orbiting Satellites

Introduction

Satellite Orbit Fundamentals

The Satellite Radio Path

Polarization Effects in Signals from an Orbiting Satellite

Summary

References

Problems

Radio Test Sites

Introduction

A Two Ray Propagation Model for harmonic waves

An Open Field Test Range Model

UWB pulse propagation with a ground reflection

Summary

References

Problems

The Urban and Suburban Paths

Introduction

Theoretical Models for Urban Propagation

Empirical Models for Urban Propagation

Propagation Beyond the Horizon

Propagation within, near, and into buildings, including UWB propagation

Polarization Effects

Summary

References

Problems

Waves in Multipath Propagation

Introduction

Urban Propagation- Understanding the Signal Behavior

Statistical Descriptions of Signals

Multipath with UWB

Signal Strength Required for Communications

Diversity Techniques

Maximum rake gain for UWB systems

MIMO Systems

Summary

References

Problems

Receiver Sensitivity and Transmitted Fields

Introduction

Field Strength Sensitivity of Receivers

Relating Fields Strength to Received Power

Test Site Field Strength Calibration

Reliability and Repeatability of Sensitivity Measurements

EMC and EMI test chamber

Transmitter Test Sites

Effect on the Human Body

RF Exposure Standards

Influence of the ground on Yagi Patterns

Summary

References

Problems

Simulated Human Body Devices

Introduction

Field Strength Sensitivities of Body Worn Receivers

Analysis of Phantom Human Simulated Body Devices

The Magnetic Fields Around Simulated Body Devices

Anthropomorphic simulated head

Summary

References

Problems

Loop, Dipole and Patch Antennas

Introduction

A Look at Quality Factor, Q

Primer on Fundamental Limitations of Small Antennas

Antennas for Personal Communications

Transmission Line Antennas

Practical Considerations for Small Antennas

UWB Antennas

Summary

References

Problems

A Radio Communication System

Introduction

Noise

Designing a Messaging System Down-Link

Designing Two-way Systems

Indoor Systems (including UWB)

System Coverage

Summary

References

Problems

Appendices

FORTRAN Code for Near Field of Dipoles and Helices

FORTAN Code for Near Field of Loop

Digital Communications Codes

HF Propagation Models

List of Symbols