4NEC2 Trapped Antenna Simulation and Design (008g2)

This video is about how to use the **FREE** 4NEC2 Antenna Modeling application to model and design a trapped dipole antenna. I have provided all the files that you might need to do this plus some extras ... see the links below.

=== PROMISED LINKS ===
4NEC Files
https://drive.google.com/file/d/1Tdhf...

Coil Winding Spreadsheet that I created for myself and use
https://drive.google.com/file/d/1AdrS...
I put it in a ZIP file so Google wouldn't try to open in in Google Sheets.

Time Markers for Your Convenience
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00:05 Introductions & Howdies
00:53 Antenna Modeling: Basic Geometry
00:59 The Single Dipole Method
01:30 The Inner Dipole + Additions Method
02:10 Modeling: Establish Design Foundations
02:28 Set Charateristic Impedance
02:47 Set the Editor to "NEC Editor (new)"
03:04 Set the Units for the Design
03:22 Set the Frequency for the Design
03:43 Set the Type of Ground
04:02 Define the Symbols/Variables
08:43 Define the Geometry of the Antenna
08:48 Overview of Geometry
09:50 Entering the Geometry in 4NEC2
11:52 Add the Source
12:16 Add the Traps
13:14 Check the Geometry
13:53 Tune the Antenna
14:10 Tune L1 - Upper Frequency using the Optimizer
15:14 Save the first Optimization Results for L1
16:15 Tune L2 - LOWER frequency using the Optimizer
17:16 Save the first Optimization Results for L2
17:36 Re-Optimization due to Interaction of L1 & L2
17:52 Re-Tune L1 - UPPER Frequency
18:26 Save the second Optimization Results for L1
18:53 Re-Tune L2 - LOWER frequency
19:30 Save the second Optimization Results for L2
Scan for SWR Performance
19:48 HIGHER Frequency
20:30 LOWER Frequency
20:57 HOW TO EXPORT DATA TO YOUR SPREADSHEET
21:31 Far Field Patterns: Propagation
23:00 FINAL DESIGN NUMBERS
24:07 Final Comments and Toodle-Oots
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