## LB Cebik [W4RNL] – Antenna Modelling

1. Converging Toward Excellence

2. Under the Limits – MININEC

3. Within the Lines – NEC-2

4. A Good Start is Half the Trip

5. Putting Sources Where You Can Find Them

6. Modelling Loads – What Kind, How Much and Where

7. Maximizing Your Data

8. Modelling Wire Arrays

9. Modelling Ground Planes and Other Radial Systems

10. Tapering to Perfection

11. A Ground Is Just a Ground – Unless It Is a Model of a Ground

12. Verticals At and Over Ground – Sensible Expectations

13. Notes on Reactive Antenna Loads and Their NEC Models – Centre Loading

14. Notes on Reactive Antenna Loads and Their NEC Models – Mid Loading

15. Notes on Reactive Antenna Loads and Their NEC Models – Linear Loading

16. Notes on Reactive Antenna Loads and Their NEC Models – Solenoid Loading

17. Notes on Reactive Antenna Loads and Their NEC Models – Unfinished Business

18. Why Tri-Banders Are Hard to Model

19. What Can We Learn From Tables

20. The Average Gain Test

21. The NEC TL Facility

22. Modelling Physical Transmission Lines

23. Modelling LPDAs

24. The Power and the Source

25. Bringing Up the Rear – Front-to-Back Ratios

26. The Scales of Equivalence

27. Modelling By Equation. ‘A’ – A Beginning

28. Modelling By Equation. ‘B’ – Bigger and Better Things

29. Modelling By Equation. ‘C’ – Formulas and Blocks

30. Modelling By Equation. ‘D’ – Scratch Pads and Coordinates

31. A Case Study – A 90′ Wire

32. A Case Study – Rotating a Beam

33. A Clean Sweep

34. The Second Ground Medium

35. Notes on Using AZ-EL Plots Effectively

36. Getting a Grip on AZ-EL and Phi-Theta

37. Verticals Using the MININEC Ground

38. Radials – Segmentation and Convergence

39. Radials – Complex Radial Systems

40. Resolution

41. Multiple Feed Point Loop Modelling

42. Moving and Rotating

43. Modelling Element Substitutes

44. Designing With NEC. A Case Study – Part 1 – The 4 S’s

45. Designing With NEC. A Case Study – Part 2 – Evaluation and Reality

46. A Load in Parallel With a Source

47. So You Want to Read an NEC-Deck

48. Radiation Plots – Polar or Rectangular. Log or Linear

49. Traps

50. The NEC-4 IS Card – Insulated Wires

51. Testing the Fringes of Modelling Programs

52. Flipping Among NEC Programs

53. Voltage and Current Sources. How?

54. GC – Wire Segment Length and Radius Tapering

55. Parallel Sources, Angular Junctions, and Average Gain – Correcting ‘Weaknesses’

56. When MININEC is Superior to NEC

57. Some Comments on Comments

58. Some Basic Guideline Graphics for NEC

59. MININEC and NEC – A Design Case Study

60. NVIS Antenna Models and the Ground Type

61. GM – Coordinate Transformation

62. GH – Helix-Spiral Specification

63. GH and GM – The NEC-4 Versions

64. An Orientation to the NEC Output File

65. The Half-Wavelength Resonant Dipole as a Core Test Instrument

66. State of the Art

67. Wire Grids 1 – Plane and Simple

68. Wire Grids 2 – Angular and Awkward

69. 4-8-16-Infinite Sided Loops

70. Refining Physical Transmission-Line Models

71. The Average Gain Test Revisited

72. The GX or Symmetry Geometry Input

73. Source-to-Feedline Matching Techniques

74. Some Numerical Green’s Function Rudiments

75. NEC – Power Efficiency vs Radiation Efficiency

76. Developing Antenna Expectations Using Modelling Software – Part 1 Horizontal Wires Lower Medium HF Range

77. Developing Antenna Expectations Using Modelling Software – Part 1 cont. – Horizontal Wires Lower Medium HF Range

78. Developing Antenna Expectations Using Modelling Software – Part 2A – Vertical Dipoles

79. Developing Antenna Expectations Using Modelling Software

80. Developing Antenna Expectations Using Modelling Software – Part 2B – Vertical Monopoles

81. Appreciating EK

82. The Nature and Adequacy of NEC Correctives

83. Insulated Wires – The NEC-2 Way

84. GA – Creating and Moving Arcs

85. Electrical Fields at a Power Level and Distance

86. NEC-2 Manual Sample Files

87. NEC-4 Manual Sample Files

88. EX and PT

89. A Note on Archimedes and Log Spirals for the NEC-4 GH Command

90. An Orientation to NEC Near Fields. Part 1. NEC-2 Input Basics and Simple Outputs

91. An Orientation to NEC Near Fields. Part 2. Some Refinements and NEC-4 Additions

92. Calculating Circular Gain

93. Convergence Revisited

94. GR – The ‘Generate Cylindrical Structure’ Command

95. Some Basics of the NT Command

96. Some Further Applications of the NT Command

97. Integrating Commands – A Case Study

98. Planar Reflectors – Wire Grid vs. SM Patches

99. S-N, RCA, and MININEC Grounds

100. The Dipole and the Coax

101. Modelling the ‘Un-Modellable’

102. True Azimuth Models – NSI Software

103. True Azimuth Models – EZNEC Software

104. PS – I Change

105. Models, Symmetry, and Loads – A Couple of Reminders

106. Refining Our Notions of Azimuth Patterns

107. Scaling Models

108. Dipoles – Variety and Modelling Hazards Linear, V and Folded Dipoles in NEC

109. Dipoles – Variety and Modelling Hazards Linear, V and Folded Dipoles in MININEC

110. Dipoles – Variety and Modelling Hazards Tapered-Diameter, Bent and Hatted Dipoles

111. Dipoles – Variety and Modelling Hazards Zig-Zag, Fold-Back and Fan Dipoles

112. Wires Meeting Ground – 2 Cases

113. When Simple Geometries Become Complex. A Rhombic Case Study.

114. Modelling Folded Monopoles

115. Single, Bifilar and Quadrifilar Helices

116. Insulation Revisited

117. Modelling and the Logic of Question Resolution

118. Modelling Odd Structures The Gamma Match. Part 1 Gamma Modelling Basics

119. Modelling Odd Structures The Gamma Match. Part 2. Gamma Assembly Variables

120. Back on the Ground

121. Radiation Patterns and Propagation

122. Reciprocity – Home on the Range

123. Radiating and Transmission-Line Currents

124. Modelling (with) Parabolic Reflectors

125. When to ‘Worry’ and When Not to Worry – A Case Study

126. ‘Ideal’ Polar Plots

127. A Potpourri of Modeller Miscellanea

128. When Not to Use NEC for Antenna Modelling

129. Some Rudiments of Receiving Pattern Modelling

130. Models vs. Prototypes – Why Field Adjustment Will Always be Necessary

131. AM Broadcast Modelling with NEC. Part 1 – Basic Considerations

132. AM Broadcast Modelling with NEC. Part 2 – Quandaries – How Many Legs and How Good is Good

133. AM Broadcast Modelling with NEC. Part 3 – The Long and Short of It

134. AM Broadcast Modelling with NEC. Part 4 – Square, Sloping, and Tapered

135. AM Broadcast Modelling with NEC. Part 5 – Multiple Tower Arrays

136. AM Broadcast Modelling with NEC. Part 6 – Grounds

137. NEC Implementations – Cores, Limitations and Work-Arounds

138. Types of Substitute Models

139. Antenna Matching with EZNEC Version 5 – Part 1. Transformers and Shunt loads

140. Antenna Matching with EZNEC Version 5 – Part 2. L-Networks

141. Circular R-X Graphs

142. VOACAP Type 13 Files

143. Modelling Radiating Surfaces

**LB Cebik [W4RNL] – QST Articles**

A Beginner’s Guide to Modelling with NEC Part 1 – Getting Started

A Beginner’s Guide to Modelling with NEC Part 2 – The ‘Ins’ and ‘Outs’ of Modelling

A Beginner’s Guide to Modelling with NEC Part 3 – Sources, Grounds and Sweeps

A Beginner’s Guide to Modelling with NEC Part 4 – Loads, Transmission Lines and Limitations

**LB Cebik [W4RNL] – Antenna Modelling Notes Volumes 1-7**

W4RNL Antenna Modelling Notes Volume 1

W4RNL Antenna Modelling Notes Volume 2

W4RNL Antenna Modelling Notes Volume 3

W4RNL Antenna Modelling Notes Volume 4

W4RNL Antenna Modelling Notes Volume 5

W4RNL Antenna Modelling Notes Volume 6

W4RNL Antenna Modelling Notes Volume 7