4-elements Yagi Antenna for 144.3 MHz - 12.5 Ohm design. Meant to be fed using a gamma match. This antenna won the Techno Antenna Fair 2014 - 2015 for Directional Antenna Category.
- Elements : 1 reflector + 1 driven element + 2 directors
- Boomlength : 1.5 m
- Material : Aluminium alloy tubes / rods
- Input impedance : 12.5 Ohm resistive nominal (use a gamma match to bring it to 50 Ohm)
- VSWR : better than 1:1.1 (when matched using a gamma match)
- Gain : better than 16 dBi (simulation, at least 3 meters above average ground, horizontal polarization)
| Element | Length,mm (full span) | diameter,mm | Position,mm |
|---|---|---|---|
| Reflector | 1020 | 4 | 0 |
| Drivent element | 949 | 10 | 320 |
| Director 1 | 942 | 4 | 860 |
| Director 2 | 922 | 4 | 1480 |
The simulation files are included in Yagi-4E-144/models/. The .nec file is created using 4NEC-2 and .maa file is created using MMANA-GAL
- Fork it https://github.com/handiko/Yagi-4E-144/fork
- Create new branch (
git checkout -b add-blah-blah) - Do some editing / create new feature
- Commit your works (
git commit -m "Adding some blah blah blah..") - Push to the branch (
git push -u origin add-blah-blah) - Create a new Pull Request