Multiband Ground Plane Antenna [ 3D print ]

Ham Radio Multiband Ground Plane Antenna

by ok1cdj

Download Files :https://www.thingiverse.com/thing:2030237

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.

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