qrti / antenna_433

3d printed 433 MHz half wave ring antenna holder

3D Printed Half Wave Ring Antenna Holder

For a 433 MHz antenna with good receiving characteristics

print list

• carry 1x

• guide_high 6x

• guide_low 6x

• mount 2x

  see print3d folder for .stl files

assembly

• prepare two wire loops, look at
  https://diydrones.com/profiles/blogs/more-433-mhz-antenna-the-1-2wave-ring-radiator

  discrepancy:
  the guides grooves are designed for 1 mm (enameled) copper wire
  using thicker wire might make the construction wobbly

• assemble three sandwiches
  mind the grooves of the guides
  one sandwich may hold the mounts
  strap each sandwich with zip ties

  order
  tie + (mount) + guide_low + wire-loop 1 + guide_high + carry + guide-high + wire-loop 2 + guide_low + (mount) + tie

• the antenna was tuned by positioning CMOS foam between the wire loops
  surprisingly this worked very well and accurate

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contact

[email protected]