Yagi antenna for APT and LRPT reception
| PARAMETER | VALUE | OTHERS |
|---|---|---|
| Frequency | 136,15 - 138,5 | MHz |
| Polarization | RHCP | |
| VSWR | 1,2 | @ 137,6MHz |
| Directivity | 11,3 | dBi |
| Antenna efficiency | 0,987 | @ 137,6MHz |
| SLL | -12,8 | dB |
| F/B Ratio | 17,2 | dB |
| XPD | 33,7 | dB; @ 137,6MHz; theta = 0º |
| Nominal Impedance | 50 | Ohm |
| MEASURE | VALUE (mm) |
|---|---|
| Reflector length | 992 |
| Dipole length | 1023 |
| Director 1 length | 970 |
| Director 2 length | 973 |
| Director 3 length | 940 |
| Reflector placement | -751 |
| Dipole placement | 0 |
| Director 1 placement | 541 |
| Director 2 placement | 1280 |
| Director 3 placement | 2012 |
| Total length of antenna | 2763 |
See the results folder for images with the results of the corresponding simulations
For fastening the yagi elements to the main boom, we have designed the following T-shaped, 3D printable pieces:
You can find both the FreeCAD souce files and the .stl printable files in the 3D folder