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Small Antenna Design

1st Edition

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Authors: Douglas Miron

eBook ISBN: 9780080498140

Paperback ISBN: 9780750678612

Imprint: Newnes

Published Date: 21st February 2006

Page Count: 304

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Description

As wireless devices and systems get both smaller and more ubiquitous, the demand for effective but small antennas is rapidly increasing. Small Antenna Design describes the theory behind effective small antenna design and give design techniques and examples for small antennas for different operating frequencies. Design techniques are given for the entire radio spectrum, from a very hundred kilohertz to the gigahertz range.

Unlike other antenna books which are heavily mathematical and theoretical, Douglas Miron keeps mathematics to the absolute minimum required to explain design techniques. Ground planes, essential for operation of many antenna designs, are extensively discussed.

Key Features

Author's extensive experience as a practicing antenna design engineer gives book a strong "hands-on" emphasis
Covers antenna design techniques from very low frequency (below 300 kHz) to microwave (above 1 GHz) ranges
Special attention is given to antenna design for mobile/portable applications such as cell phones, WiFi, etc

Readership

RF/wireless design engineers and engineering managers; Electronics engineering students

Preface Chapter 1: Introduction 1.1 What is Small? 1.2 What are the Problems? 1.3 Some Historical Small Antenna Types and Applications 1.4 Some Present and Future Small Antennas References Chapter 2: Antenna Fundamentals I 2.1 Electromagnetic Waves 2.1.1 Waves in Space 2.1.2 Waves in Transmission Lines 2.1.3 Power in Waves 2.2 Polarization 2.3 The Short Dipole 2.3.1 Radiation Pattern 2.3.2 Circuit Behavior 2.4 The Small Loop 2.4.1 Circuit Behavior 2.5 Directionality, Efficiency, and Gain References Problems Chapter 3: Antenna Fundamentals II 3.1 Bandwidth and Quality Factor, Q 3.2 Impedance Matching and System Efficiency 3.2.1 Narrow-Band Matching 3.2.2 Wideband Matching 3.2.3 System Efficiency 3.3 Reception 3.3.1 Effective Height 3.3.2 Effective Area 3.3.3 Reception Pattern 3.4 Ground Effects 3.4.1 Image Theory 3.4.2 Vertical Dipole Above a Perfect Ground Plane 3.4.3 Horizontal Dipole Above a PEC Plane 3.4.4 Grounded-Source Antennas 3.4.5 Counterpoise 3.4.6 Summary of Ground Effects 3.5 Improvements References Problems Chapter 4: Introduction to Numerical Modeling of Wire Antennas 4.1 General Concepts 4.2 The Mathematical Basics of the Numerical Electromagnetic Code (NEC) 4.2.1 Basis Functions 4.2.2 Applied Field Models 4.2.3 Solving the Integral Equation 4.3 Using NEC in the Command Window 4.4 Modeling Guidelines 4.5 NEC in a Graphical User Interface (GUI) 4.6 Examples from Chapters 2 and 3 4.6.1 The Short Dipole 4.6.2 Small Loop in Free Space 4.6.3 End-Loaded Short Dipole References Problems Chapter 5: Programmed Modeling 5.0 Introduction 5.1 Using Wire-List Generators in NEC 5.2 Using Code to Generate a Wire List Problems Chapter 6: Open-Ended Antennas 6.0 Introduction 6.1 Thick Monopoles 6.1.1 Modeling Thick Monopoles 6.2 Top Loading 6.2.1 The Inverted-L 6.2.2 Top-Loading with Radials 6.2.3 Volume Loading 6.3 Coil Loading 6.4 Using Resonance 6.5 Summary References Problems Chapter 7: Loops and Other Closed-Wire Antennas 7.0 Introduction 7.1 Thick Loops 7.1.1 The Doughnut 7.1.2 The Barrel Loop 7.2 Solenoid Antennas 7.3 The Contrawound Toroidal Helix Antenna (CTHA) 7.4 The Folded Spherical Helix Monopole 7.5 Final Comments References Problems Chapter 8: Receiving Antennas 8.0 Introduction 8.1 External Noise 8.2 The Ferrite Rod Antenna 8.2.1 Antenna Parameters 8.2.2 Circuit Applications 8.3 Active Receiving Antennas References Problems Chapter 9: Measurements 9.1 What are You Measuring? 9.2 Measurements Through a Transmission Line 9.2.1 If I only have an SWR meter... 9.2.2 Impedance Measured Through a Transmission Line 9.3 Ranges and Test Enclosures 9.4 The Wheeler Cap and Variations 9.4.1 Series and Parallel Effects References Problems Appendix A: The Mathematics of Antenna Orientation A.1 Unit-Vector and Coordinate Variable Relations. A.2 The Horizontal Dipole A.3 The Vertical Loop Problems Appendix B: The Parallel-Ray Approximation Problems Appendix C: The Small Loop Problems Appendix D: The Proximity Effect D.1 Current Distribution D.1.1 Problem Formulation and Reduction to a System of Linear Equations D.1.2 Solution for the Current Coefficients D.2 Power and Resistance References Appendix E: What Every EE Student Should Know About Mathematics by the Senior Year E.1 What is Mathematics to an Engineer? E.2 The Process is as Important as the Result E.3 Facts and Idioms E.3.1 Special Numbers E.3.2 Identities and Formulas E.3.3 Approximations E.4 Integrals and Derivatives E.5 Radians or Degrees? E.6 Matrix Notation and Operations E.7 Answers for Section E.3 Index

Details

No. of pages:: 304

Language:: English

Published:: 21st February 2006

Imprint:: Newnes

eBook ISBN:: 9780080498140

Paperback ISBN:: 9780750678612

About the Author

Douglas Miron

Affiliations and Expertise

Consultant

Reviews

“The book is written in a conversational style, with many first-person descriptions, historical notes and explanations. The casual language gives way to more formal explanations where appropriate. The effect is that the reader can easily visualize him- or herself in a classroom lecture environment with a knowledgeable and personable professor.” – High Frequency Electronics, May 2006 "…the book is a good one that I recommend. It is heavy on the math, but none of it is overly exotic and all of it is easily dealt with. Even though I already have a dozen antenna books in my personal library, I like this one as it adds another dimension. The author has obviously had the experience to create this unique book." - Electronic Design, April 2006

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