DIY 434Mhz Antenna

If you would like to make your own 434Mhz yagi, here is some info to help you.  Let me know if you have any questions.
Brian

Materials

  1. Aluminium arrows or tubing (6mm diameter)
  2. 1 inch wide non-conductive material for the boom
  3. RG6 coax
  4. BNC connector
  5. Balum – Here is a PDF with the info to create your own balun using RG6 (Balun_for_434_MHz_using_259_mm_loop_of_RG-6)
  6. Tools for bending and soldering

Antenna Details

These antenna designs were calculated using an online calculator here: http://www.changpuak.ch/electronics/yagi_uda_antenna_DL6WU.php

There are two full antennas here, but you can choose to create a 3 element and then have additional pieces to add on more elements if needed for a long distance track.  That is how I use mine.  For the boom, if you do not have a non-conductive material (like pvc conduit) you can build insulators (13mm or greater) to mount the elements to.

3 Elements
Frequency : 434 MHz
Wavelength : 691 mm
Rod Diameter : 6 mm
Boom Diameter : 25 mm
Boom Length : 230 mm
d/lambda : 0.009 ( min.: 0.002 , max.: 0.01 )
D/lambda : 0.036 ( min.: 0.01 , max.: 0.05 )
Elements : 3
Gain : 5.23 dBd (approx.)
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Reflector Length : 333 mm
Reflector Position : 0 mm
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Dipole Position : 166 mm
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Director #1 Position : 218 mm , Length : 314 mm
Distance Dipole – Dir. #1 : 52 mm
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Directors / Parasitics are isolated.
Please choose an isolater thicker than : 13 mm

 

6 Elements
Frequency : 434 MHz
Wavelength : 691 mm
Rod Diameter : 6 mm
Boom Diameter : 25 mm
Boom Length : 676 mm
d/lambda : 0.009 ( min.: 0.002 , max.: 0.01 )
D/lambda : 0.036 ( min.: 0.01 , max.: 0.05 )
Elements : 6
Gain : 9.01 dBd (approx.)
————————————————————-
Reflector Length : 333 mm
Reflector Position : 0 mm
————————————————————-
Dipole Position : 166 mm
————————————————————-
Director #1 Position : 218 mm , Length : 314 mm
Distance Dipole – Dir. #1 : 52 mm
————————————————————-
Director #2 Position : 342 mm , Length : 311 mm
Distance Dir. #1 – Dir. #2 : 124 mm
————————————————————-
Director #3 Position : 491 mm , Length : 308 mm
Distance Dir. #2 – Dir. #3 : 149 mm
————————————————————-
Director #4 Position : 664 mm , Length : 306 mm
Distance Dir. #3 – Dir. #4 : 173 mm
————————————————————-
Directors / Parasitics are isolated.
Please choose an isolater thicker than : 13 mm

September 2017

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  • Missouri Falconer's Association Annual Club Raffle and Picnic at O'Connor Park 12741 Hemet Ln, Bridgeton, MO 63044
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