F9FT - 9 elements YAGI Antenna - HAM Radio Antenna
| Electrical data | |
| Radiation at 144.5 MHz | |
| Effective electrical length............................ | : 1.65 l |
| Isotropic gain............................................ | : 13.1 dBi |
| Aperture angle @ -3 dB | |
|
- E-plane ...........
|
: 2 x 20.2° |
|
- H-plane ...........
|
: 2 x 23° |
| First side lobe set | |
|
- E-plane ...........
|
: - 20.5 dB @ 54° |
|
- H-plane ...........
|
: - 13.6 dB @ 58° |
| Rear protection......................................... | : - 19.8 dB |
| Average stray radiation | |
|
- E-plane ...........
|
: - 30 dB |
|
- H-plane ...........
|
: - 18 dB |
| Bandwidth | |
| Gain @ -1 dB........................................... | : 140 to 148 MHz |
| Nominal impedance.................................. | : 50 W |
| Impedance match bandwidth @ SWR<1.3/1 | : 143.4 to 146.2 MHz |
| Acceptable RF power (continous duty)........ | : 1000 W |
| Array of 2 or 4 antennas | |
| (optimized stacking distance, from center to | |
| center of elements, for minimal side lobe | |
| radiation) | |
|
- E-plane - Electrical distance ..
|
: 1.33 l |
|
- E-plane - Practical distance ...
|
: 2.77 m |
|
- H-plane - Electrical distance ..
|
: 1.33 l |
|
- H-plane - Practical distance ...
|
: 2.77 m |
| Mechanical data | |
| Connector................................................ | : N |
| Overall length............................................ | : 3.47 m |
| Mass....................................................... | : 3.0 kg |
| Effective wind load | |
|
- Horizontal polarisation..
|
: 0.10 m2 |
|
- Vertical polarisation......
|
: 0.15 m2 |
| Approximate wind load (25m/s - 55 mph) | |
|
- Horizontal polarization..
|
: 4.1 daN |
|
- Vertical polarization.....
|
: 6.1 daN |
| Approximate wind load (45m/s - 100 mph) | |
|
- Horizontal polarization..
|
: 13.2 daN |
|
- Vertical polarization.....
|
: 19.7 daN |