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Small Antenna Design 附带光盘资料: Small Antenna Design.part02.rar

 

Small Antenna Design 附带光盘资料:
Small Antenna Design 附带光盘资料
CONTENTS OF THIS CD-ROM
Small Antenna Design
by Douglas B. Miron, Ph.D.
  • NEC
    Numerical methods are the main tool used in this book. The main numerical tool is NEC2, the U.S. Government-developed code for modeling wire antennas. The folder NEC has source code and executables for the current user-modified version of this code. The root folder also has a public-domain GUI in a .zip file. In addition, the NEC folder has many C++ programs to generate NEC input files for various antennas and structures. These programs read text files with numbers describing the geometry and operating conditions for each antenna and structure. Examples of such text files and other utility programs are also in the NEC folder.
    Open NEC Folder.
    Open Root Folder.
  • MATRF
    MATLAB was used for data analysis in many of the examples in the book. Utility programs to find the equivalent circuit Q, bandwidth, resistance components, and antenna voltage for a given power input are in the MATRF folder. This folder also contains programs for impedance-matching design, both narrow-band and wide-band. Also, there are programs for generating data used in some of the book抯 examples, including the NEC basis functions and curve-fitting with these functions.
    Open MATRF Folder.
Small Antenna Design 附带光盘资料
Small Antenna Design 附带光盘资料
Small Antenna Design 附带光盘资料
Small Antenna Design 附带光盘资料
Small Antenna Design 附带光盘资料
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Mobile Antenna Systems Handbook 著者: Kyōhei Fujimoto, James R. James
移动天线系统手册 人邮1997(藤本共荣  J.R.詹姆斯)
Small Antenna Design 附带光盘资料
Preface xi
About the Author ..... xiii
What’s on the CD-ROM? ................. xv
Chapter 1: Introduction..................... 1
1.1 What Is Small?..........1
1.2 What Are the Problems? .................2
1.3 Some Historical Small Antenna Types and Applications............2
1.4 Some Present and Future Small Antennas ............5
References.8
Chapter 2: Antenna Fundamentals I ... 9
2.1 Electromagnetic Waves ...................9
2.1.1 Waves in Space .............11
2.1.2 Waves in Transmission Lines..............14
2.1.3 Power in Waves.............18
2.2 Polarization .............20
2.3 The Short Dipole.....23
2.3.1 Radiation Pattern...........24
2.3.2 Circuit Behavior............28
2.4 The Small Loop.......31
2.4.1 Circuit Behavior............32
2.5 Directionality, Effciency, and Gain....................35
References.....................37
Chapter 2 Problems.......38
Chapter 3: Antenna Fundamentals II  43
3.1 Bandwidth and Quality Factor, Q.43
3.2 Impedance Matching and System Effciency......51
3.2.1 Narrow-Band Matching 52
3.2.2 Wideband Matching......53
3.2.3 System Effciency .........55
3.3 Reception ................56
3.3.1 Effective Height ............57
3.3.2 Effective Area ...............58
3.3.3 Reception Pattern..........58
3.4 Ground Effects ........59
3.4.1 Image Theory................59
3.4.2 Vertical Dipole Above a Perfect Ground Plane.........60
3.4.3 Horizontal Dipole Above a PEC Plane .....................63
3.4.4 Grounded-Source Antennas ................66
3.4.5 Counterpoise .................67
3.4.6 Summary of Ground Effects ...............68
3.5 Improvements .........68
References.....................69
Chapter 3 Problems.......71
Chapter 4: Introduction to Numerical Modeling of Wire Antennas.... 75
4.1 General Concepts....75
4.2 The Mathematical Basics of the Numerical Electromagnetic
Code (NEC) ...........77
4.2.1 Basis Functions.............79
4.2.2 Applied Field Models ...88
4.2.3 Solving the Integral Equation .............91
4.3 Using NEC in the Command Window................92
4.4 Modeling Guidelines.....................99
4.5 NEC in a Graphical User Interface (GUI) ........103
4.6 Examples from Chapters 2 and 3105
4.6.1 The Short Dipole.........105
4.6.2 Small Loop in Free Space.................106
4.6.3 End-Loaded Short Dipole .................108
References...................109
Chapter 4 Problems.....110
Chapter 5: Programmed Modeling .. 113
5.0 Introduction...........113
5.1 Using Wire-List Generators in NEC.................113
5.2 Using Code to Generate a Wire List .................118
Chapter 5 Problems.....131
Chapter 6: Open-Ended Antennas .. 133
6.0 Introduction...........133
6.1 Thick Monopoles ..135
6.1.1 Modeling Thick Monopoles..............136
6.2 Top Loading ..........140
6.2.1 The Inverted-L ............140
6.2.2 Top-Loading with Radials.................146
6.2.3 Volume Loading..........149
6.3 Coil Loading .........152
6.4 Using Resonance...165
6.5 Summary...............172
References...................174
Chapter 6 Problems.....175
Chapter 7: Loops and Other Closed-Wire Antennas 179
7.0 Introduction...........179
7.1 Thick Loops ..........180
7.1.1 The Doughnut .............180
7.1.2 The Barrel Loop..........185
7.2 Solenoid Antennas 194
7.3 The Contrawound Toroidal Helix Antenna (CTHA) ..............198
7.4 The Folded Spherical Helix Monopole.............202
7.5 Final Comments....205
References...................206
Chapter 7 Problems.....207
Chapter 8: Receiving Antennas....... 211
8.0 Introduction...........211
8.1 External Noise.......212
8.2 The Ferrite Rod Antenna.............213
8.2.1 Antenna Parameters ....214
8.2.2 Circuit Applications ....219
8.3 Active Receiving Antennas .........223
8.3.1 The Active Whip .........224
8.3.2 The Active Loop .........225
8.3.3 General Considerations.....................225
References...................230
Chapter 8 Problems.....231
Chapter 9: Measurements ............. 235
9.1 What Are You Measuring? ..........235
9.2 Measurements Through a Transmission Line...236
9.2.1 If I Only Have an SWR Meter... .......237
9.2.2 Impedance Measured Through a Transmission Line....................239
9.3 Ranges and Test Enclosures........2409.4 The Wheeler Cap and Variations.242
9.4.1 Series and Parallel Effects ................243
References...................246
Chapter 9 Problems.....247
Appendix A: The Mathematics of Antenna Orientation ................. 249
A.1 Unit-Vector and Coordinate Variable Relations.....................249
A.2 The Horizontal Dipole ...............251
A.3 The Vertical Loop.252
Appendix A Problems.253
Appendix B: The Parallel-Ray Approximation......... 255
Appendix B Problems.257
Appendix C: The Small Loop .......... 259
Appendix C Problems.262
Appendix D: The Proximity Effect... 263
D.1 Current Distribution ...................263
D.1.1 Problem Formulation and Reduction to a System of
Linear Equations........263
D.1.2 Solution for the Current Coeffcients.....................267
D.2 Power and Resistance.................269
References...................270
Appendix E: What Every EE Student Should Know About Mathematics
by the Senior Year ............... 271
E.1 What Is Mathematics to an Engineer?..............271
E.2 The Process Is as Important as the Result ........271
E.3 Facts and Idioms...272
E.3.1 Special Numbers ........272
E.3.2 Identities and Formulas ....................273
E.3.3 Approximations ..........273
E.4 Integrals and Derivatives ............273
E.5 Radians or Degrees?...................274
E.6 Matrix Notation and Operations.274
E.7 Answers for Section E.3 .............275
Index ..................... 277
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