Small Antenna Design

Douglas B. Miron

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商品描述

Description:

As wireless devices and systems get both smaller and more ubiquitous, the demand for effective but small antennas is rapidly increasing. This book will describe 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. The book will also include a CD-ROM with design software that will greatly simplify readers' daily design tasks.

 

Table of Contents:

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

商品描述(中文翻譯)

描述:
隨著無線設備和系統變得越來越小和普及,對於有效但小型天線的需求正在迅速增加。本書將描述有效小型天線設計的理論,並提供不同操作頻率的小型天線的設計技巧和示例。設計技巧適用於整個無線電頻譜,從幾百千赫茲到幾吉赫茲的範圍。

與其他數學和理論性較重的天線書籍不同,Douglas Miron將數學限制在最低限度,僅用於解釋設計技巧所需。地面平面對於許多天線設計的運作至關重要,因此在本書中有詳細的討論。本書還將附帶一個帶有設計軟件的CD-ROM,可以大大簡化讀者的日常設計任務。

目錄:
前言
第1章:介紹
1.1 什麼是小型天線?
1.2 有哪些問題?
1.3 一些歷史上的小型天線類型和應用
1.4 一些現在和未來的小型天線
參考文獻

第2章:天線基礎知識 I
2.1 電磁波
2.1.1 空間中的波
2.1.2 傳輸線中的波
2.1.3 波的功率
2.2 偏振
2.3 短偶極子
2.3.1 輻射圖案
2.3.2 電路行為
2.4 小型環
2.4.1 電路行為
2.5 定向性、效率和增益
參考文獻
問題

第3章:天線基礎知識 II
3.1 頻寬和品質因數 Q
3.2 阻抗匹配和系統效率
3.2.1 窄帶匹配
3.2.2 寬帶匹配
3.2.3 系統效率
3.3 接收
3.3.1 有效高度
3.3.2 有效面積
3.3.3 接收圖案
3.4 地面效應
3.4.1 影像理論
3.4.2 完美地面平面上的垂直偶極子
3.4.3 PEC平面上的水平偶極子
3.4.4 接地源天線
3.4.5 對地線
3.4.6 地面效應總結
3.5 改進
參考文獻
問題

第4章:對導線天線的數值建模介紹
4.1 一般概念
4.2 數值電磁代碼(NEC)的數學基礎
4.2.1 基礎函數
4.2.2 應用場模型
4.2.3 解決積分方程
4.3 在命令窗口中使用NEC
4.4 建模指南
4.5 在圖形用戶界面(GUI)中使用NEC
4.6 來自第2章和第3章的示例
4.6.1 短偶極子
4.6.2 自由空間中的小型環
4.6.3 端載荷短偶極子
參考文獻
問題

第5章:程式化建模
5.0 介紹
5.1 在NEC中使用線條列表生成器
5.2 使用代碼生成線條列表
問題

第6章:開放式天線
6.0 介紹
6.1 厚度單極天線
6.1.1 厚度單極天線建模
6.2 頂部加載
6.2.1 倒L型天線
6.2.2 帶有導地線的頂部加載
6.2.3 體積加載
6.3 線圈加載
6.4 使用共振
6.5 總結
參考文獻
問題

第7章:環和其他封閉導線天線
7.0 介紹
7.1 厚環
7.1.1 圓環
7.1.2 桶形環
7.2 螺線管天線
7.3 反向扭曲圓柱螺旋天線(CTHA)
7.4 折疊球面螺旋單極天線
7.5 最後評論
參考文獻
問題

第8章:接收天線
8.0 介紹
8.1 外部噪聲
8.2```