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Ham Radio Multiband Ground Plane Antenna

by ok1cdj, published

Ham Radio Multiband Ground Plane Antenna by ok1cdj Jan 11, 2017
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Thing Statistics

2233Views 386Downloads Found in Electronics

Summary

This is remix from http://www.thingiverse.com/thing:1725339

The idea is make 3 or 4 band lightweight portable vertical antenna.
The dimensions and simulations and measurements coming soon.
Work is in progress.

The holder is designed in Openscad and use cable ties.

CHANGE LOG

12.1.2017
  • Added simulation of 40,20,30m version with base loading coil.
13.1.2017
  • Added radial end insulator in STL and OpenSCAD
23.1.2017
  • Added reduction for BNC connector and cover when connector is not used
26.1.2017
  • Added knob for M6 nuts
07.2.2017
  • Coil inductance measurement
10.2.2017
  • Improved coil holder for better fit of cable ties
12.2.2017
  • Bottom fixing for fibre glass pole - 6m Decathon travel pole or cheap 6m pole Agepoch from Aliexpress.
  • pole guying part for top of pole - 5mm and 10mm diameter
26.2.2017
  • Field test of 40/30/20m version with VNA, 4.1 m lenght of vertical element, 5.25m radials
    Antenna is really narrow on 40m as expected.
  • Plots from VNA.
24.4.2017

-wiring diagram

Print Settings

Printer:

Prusa MK2

Rafts:

No

Supports:

Yes

Resolution:

0.2

Infill:

20%


Notes:

Only coil and holder need support, other parts without support..

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How do i wire this up?

Wiring diagram added to pictures.

73 !

thank you very much, hopefully in a week or two i can throw up a completed picture. my printer is just a tad to short to print this fully so i'll have to shorten it up by 10mm or so to get it to fit. I see you have the scad files uploaded though so that shouldnt be an issue.
Of course i realize this after im 8 hours into the print.

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