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
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