Hexagon coupler - v1.1

This is a capacitive coupler for tuning Short Loop Antennas (STL).
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updated October 27, 2023

Description

PDF

 Introduction

This is a capacitive coupler for tuning Short Loop Antennas (STL).

It is an evolution from the ‘Patterson Match’ aka military loop from 1967, this is my fifth generation of: Simplified Patterson Coupler

More build description and use here: Hexagon Coupler v1 from the blog Electromagnetic Adventures.

Needed material
  • Printed model
  • 5 cm wide copper tape
  • 2 pcs Knobs (optional)
  • 4 pcs small self threading screws
  • 1 pcs BNC Connector 
  • 2 pcs banana female connector
Tools:
  • M10 Threading tool - or modify model and print with threads
  • Small drill
  • Screwdriver

INSTRUCTION


(please contact me if instruction is unclear so I can improve)


Add copper tape to inner, outer and middle hexagon. Thread inner and outer hexagon.

Secure each shaft with disk and 2 self-threading screws.

Solder wires, add some foil to solder wire away from hexagons, Be careful and work fast to not melt 3D model: 

  • RFin 
    • Ground: to middle hexagon, 
    • Signal: to upper hexagon
  • Loop antenna
    • L1: Outer hexagon
    • L2: Middle Hexagon

Tested only with 10W but it should be able to handle more, ensure that distance between foils are > 1mm and cut away excess to avoid short circuit

Warning

Keep  away when in operation, use the protective cover, because when in resonance the voltage can be several 1000 volts and burn your fingers. 

Revision History

  • v1.0 2023-10-15 First release
  • v1.1 2023-10-19 Add shaft, remove disk, add separate STL per object. Make text visible on case

Tags



Model origin

The author marked this model as their own original creation.

License