144 MHZ 146
144 MHZ 146
144 MHZ 146
vertical
horizontal
The antenna is in use for portabel since 2000.
7 element antenna for portabel made from a 9 element F9FT portabel
This 7 element is now 25cm shorter, but the gain is still the same.
The pattern and the SWV bandwith is much better now!
--------------- 9 element F9FT portabel ---------------
--------------- 7 element portabel ---------------
144 MHZ 146
|
reflector |
dipol |
D1 |
D2 |
D3 |
D4 |
D5 |
distance |
0 |
264 |
572 |
1061 |
1735 |
2481 |
3200 |
lenght |
1024 |
F9FT |
960 |
940 |
920 |
902 |
873 |
diameter |
4 |
F9FT |
4 |
4 |
4 |
4 |
4 |
144 MHZ 146
144 MHZ 146
144 MHZ 146
144 MHZ 146
144 MHZ 146