| |
| |
| Preface | |
| |
| |
| |
| Introduction | |
| |
| |
| |
| What is Small? | |
| |
| |
| |
| What are the Problems? | |
| |
| |
| |
| Some Historical Small Antenna Types and Applications | |
| |
| |
| |
| Some Present and Future Small Antennas References | |
| |
| |
| |
| Antenna Fundamentals I | |
| |
| |
| |
| Electromagnetic Waves | |
| |
| |
| |
| Waves in Space | |
| |
| |
| |
| Waves in Transmission Lines | |
| |
| |
| |
| Power in Waves | |
| |
| |
| |
| Polarization | |
| |
| |
| |
| The Short Dipole | |
| |
| |
| |
| Radiation Pattern | |
| |
| |
| |
| Circuit Behavior | |
| |
| |
| |
| The Small Loop | |
| |
| |
| |
| Circuit Behavior | |
| |
| |
| |
| Directionality, Efficiency, and Gain References Problems | |
| |
| |
| |
| Antenna Fundamentals II | |
| |
| |
| |
| Bandwidth and Quality Factor, Q | |
| |
| |
| |
| Impedance Matching and System Efficiency | |
| |
| |
| |
| Narrow-Band Matching | |
| |
| |
| |
| Wideband Matching | |
| |
| |
| |
| System Efficiency | |
| |
| |
| |
| Reception | |
| |
| |
| |
| Effective Height | |
| |
| |
| |
| Effective Area | |
| |
| |
| |
| Reception Pattern | |
| |
| |
| |
| Ground Effects | |
| |
| |
| |
| Image Theory | |
| |
| |
| |
| Vertical Dipole Above a Perfect Ground Plane | |
| |
| |
| |
| Horizontal Dipole Above a PEC Plane | |
| |
| |
| |
| Grounded-Source Antennas | |
| |
| |
| |
| Counterpoise | |
| |
| |
| |
| Summary of Ground Effects | |
| |
| |
| |
| Improvements References Problems | |
| |
| |
| |
| Introduction to Numerical Modeling of Wire Antennas | |
| |
| |
| |
| General Concepts | |
| |
| |
| |
| The Mathematical Basics of the Numerical Electromagnetic Code (NEC) | |
| |
| |
| |
| Basis Functions | |
| |
| |
| |
| Applied Field Models | |
| |
| |
| |
| Solving the Integral Equation | |
| |
| |
| |
| Using NEC in the Command Window | |
| |
| |
| |
| Modeling Guidelines | |
| |
| |
| |
| NEC in a Graphical User Interface (GUI) | |
| |
| |
| |
| Examples from Chapters 2 and 3 | |
| |
| |
| |
| The Short Dipole | |
| |
| |
| |
| Small Loop in Free Space | |
| |
| |
| |
| End-Loaded Short Dipole References Problems | |
| |
| |
| |
| Programmed Modeling | |
| |
| |
| |
| Introduction | |
| |
| |
| |
| Using Wire-List Generators in NEC | |
| |
| |
| |
| Using Code to Generate a Wire List Problems | |
| |
| |
| |
| Open-Ended Antennas | |
| |
| |
| |
| Introduction | |
| |
| |
| |
| Thick Monopoles | |
| |
| |
| |
| Modeling Thick Monopoles | |
| |
| |
| |
| Top Loading | |
| |
| |
| |
| The Inverted-L | |
| |
| |
| |
| Top-Loading with Radials | |
| |
| |
| |
| Volume Loading | |
| |
| |
| |
| Coil Loading | |
| |
| |
| |
| Using Resonance | |
| |
| |
| |
| Summary References Problems | |
| |
| |
| |
| Loops and Other Closed-Wire Antennas | |
| |
| |
| |
| Introduction | |
| |
| |
| |
| Thick Loops | |
| |
| |
| |
| The Doughnut | |
| |
| |
| |
| The Barrel Loop | |
| |
| |
| |
| Solenoid Antennas | |
| |
| |
| |
| The Contrawound Toroidal Helix Antenna (CTHA) | |
| |
| |
| |
| The Folded Spherical Helix Monopole | |
| |
| |
| |
| Final Comments References Problems | |
| |
| |
| |
| Receiving Antennas | |
| |
| |
| |
| Introduction | |
| |
| |
| |
| External Noise | |
| |
| |
| |
| The Ferrite Rod Antenna | |
| |
| |
| |
| Antenna Parameters | |
| |
| |
| |
| Circuit Applications | |
| |
| |
| |
| Active Receiving Antennas References Problems | |
| |
| |
| |
| Measurements | |
| |
| |
| |
| What are You Measuring? | |
| |
| |
| |
| Measurements Through a Transmission Line | |
| |
| |
| |
| If I only have an SWR meter... | |
| |
| |
| |
| Impedance Measured Through a Transmission Line | |
| |
| |
| |
| Ranges and Test Enclosures | |
| |
| |
| |
| The Wheeler Cap and Variations | |
| |
| |
| |
| Series and Parallel Effects References Problems | |
| |
| |
| |
| The Mathematics of Antenna Orientation | |
| |
| |
| |
| Unit-Vector and Coordinate Variable Relations | |
| |
| |
| |
| The Horizontal Dipole | |
| |
| |
| |
| The Vertical Loop Problems | |
| |
| |
| |
| The Parallel-Ray Approximation Problems | |
| |
| |
| |
| The Small Loop Problems | |
| |
| |
| |
| The Proximity Effect | |
| |
| |
| |
| Current Distribution | |
| |
| |
| |
| Problem Formulation and Reduction to a System of Linear Equations | |
| |
| |
| |
| Solution for the Current Coefficients | |
| |
| |
| |
| Power and Resistance References | |
| |
| |
| |
| What Every EE Student Should Know About Mathematics by the Senior Year | |
| |
| |
| |
| What is Mathematics to an Engineer? | |
| |
| |
| |
| The Process is as Important as the Result | |
| |
| |
| |
| Facts and Idioms | |
| |
| |
| |
| Special Numbers | |
| |
| |
| |
| Identities and Formulas | |
| |
| |
| |
| Approximations | |
| |
| |
| |
| Integrals and Derivatives | |
| |
| |
| |
| Radians or De | |