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4NEC2 Definitive Guide

Mark Schoonover KA6WKE

Learn how to use 4NEC2 in the design and analysis of antenna systems.

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About

About

About the Book

Learn how to use 4NEC2 in the design and analysis of antenna systems. With a sample version and a full (paid) version of the book, the reader will start from downloading and installing 4NEC2, learning the 4NEC2 user interface, build a 20M dipole and analyze it at various heights above real ground then view the different antenna patterns. The sample version of the book will get anyone started with 4NEC2, or to learn 4NEC2 if you're already familiar with other antenna analysis software.

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SoftwareComputers and Programming

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License

Creative Commons Attribution 4.0 International License

Author

About the Author

Mark Schoonover KA6WKE

Mark Schoonover has been licensed since 1982 when he got his Novice license on a wager with my dad. If he didn't pass his Novice test, he had to mow the lawn for FREE all summer break. He got his General license in 1983 from the now long closed FCC Field Office in San Francisco. Upon his return from Navy active duty in 1987 he got his Advanced license. Around 2000 he got his Extra. He's held his call since 1982 and don't have any plans to obtain a vanity call. He enjoys homebrewing and contesting from his pip-squeak station in southern California. Professionally, he has a degree in Computer Science and Software Engineering. He switched from Electrical Engineering when the internet became publicly available. Currently he's a Senior Systems Engineer for a major health care provider in the United States. He's been married to his best friend for 23 years and they have three boys all in college. On the occasions they are being too loud, he's been known to launch a denial of service attack against their gaming computers!

Contents

Table of Contents

Introduction

  1. Conventions
  2. Selecting Menus
  3. Program Specific Text
  4. Warnings, Tips, Errors, Information
  5. This is a warning!
  6. This is a tip!
  7. This is an error.
  8. This is just info
  9. PC Requirements
  10. Supported Operating Systems

About the Author

Chapter One - Installation

  1. Downloading 4NEC2
  2. Installing 4NEC2 and Configuration

Chapter Two - Learning Your Way Around

  1. Finding Help
  2. Main Window
  3. Menus
  4. Minimum Segments
  5. Toolbar
  6. Remainder of Main Window
  7. Geometry Window
  8. Show Menu
  9. View Menu
  10. Validate Menu
  11. Currents Menu
  12. Far-field Menu
  13. Near-field Menu
  14. Wire Menu
  15. Plot Menu
  16. Pattern Window
  17. Show Menu
  18. Far Field Menu
  19. Near Field Menu
  20. Compare Menu
  21. Transfer Menu
  22. FFtab Menu
  23. Plot Menu
  24. 3D Viewer Window
  25. Right Toolbar
  26. Smith Chart
  27. Geometry Builder

Chapter Three - Building and Analyzing a Dipole Antenna

  1. A Word or Three about Theoretical VS Real Antennas
  2. Isotropic Antenna
  3. Dipole in Free Space
  4. Real Antenna
  5. Comments on Theoretical Antennas and Such
  6. Using the Geometry Editor
  7. Getting Ready
  8. Creating a New NEC File
  9. Design Conventions
  10. 4NEC2 Doesn’t Care
  11. Drawing the Dipole
  12. Segments are Odd
  13. Just One Wire?
  14. Adding Ground Underneath the Dipole
  15. Adding the Source
  16. Where Did the Dipole Go?
  17. Analyzing the Results
  18. Conclusion

Chapter Four - 4NEC2 Editors

  1. Geometry Editor Overview
  2. Menus
  3. Options Box
  4. Toolbar
  5. Views
  6. NEC editor (New)
  7. 4NEC2 (New) Editor File Menu
  8. Exit
  9. 4NEC2 (New) Editor Cell & Rows Menus
  10. 4NEC2 (New) Editor Selection Menu
  11. 4NEC2 (New) Editor Options Menu
  12. 4NEC2 (New) Editor Symbols Tab
  13. What’s Your Sign?
  14. Frequency Sweeping
  15. 4NEC2 (New) Editor Geometry Tab
  16. Why Manual Calculation?
  17. 4NEC2 (New) Editor Source/Load Tab
  18. What Happened to Y21 Parameters??
  19. 4NEC2 (New) Editor Freq/Ground Tab
  20. Radius not Diameter
  21. 4NEC2 (New) Editor Other Tab
  22. 4NEC2 (New) Editor Comment Tab
  23. NEC2 Cards
  24. NEC editor
  25. NEC2 Card Mnemonics
  26. SY Cards
  27. Diameter and Radius
  28. Inserting a New Card (Line)
  29. Notepad Edit
  30. Conclusion

Chapter 5 - Geometry Builder

  1. Overview
  2. Patch
  3. Inches to Meters
  4. Use Equal Area Default Setting
  5. Move CM Row
  6. DESIGN: 300 MHz Dipole with Planar Reflector
  7. DOS Pop-Up Window
  8. Default Build.nec File
  9. Patch Conclusion
  10. Plane
  11. Radius in Meters
  12. Isn’t 360 degrees Equal to 0?
  13. Radial & Circular Values Swapped
  14. Why Square?
  15. Auto-Segmentation
  16. Use Equal Area Default Setting
  17. Move CM Row
  18. DESIGN: 300 MHz Vertical
  19. Plane Conclusion
  20. Box
  21. X, Y, Z Axes
  22. X, Y, Z Sections
  23. Auto-Segmentation
  24. Use Equal Area Default Setting
  25. Rotate and Move
  26. Move CM Row
  27. Conclusion
  28. Cylinder
  29. NEC Data Files
  30. Dimensions
  31. Units
  32. Isn’t 360 degrees Equal to 0?
  33. Sections
  34. Auto-Segmentation
  35. Use Equal Area Default Setting
  36. Radii Need Values
  37. Rotate and Move
  38. Move CM Row
  39. Conclusion

4NEC2 Function Keys & Keyboard Shortcuts Cheat Sheet

  1. Main Window
  2. Function Keys
  3. Keyboard Shortcuts
  4. Geometry Window
  5. Function Keys
  6. Keyboard Shortcuts
  7. Pattern Window
  8. Keyboard Shortcuts
  9. Smith Chart
  10. Keyboard Shortcuts

Appendix A - Directories & File Locations

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