For: DX portion 11 meter band
Antenna Type: 7 el F-YAGI
Folded Dipole radiator
Designed by: HPSD version 1.01 Nov 2011
Boom length: 9,9 Meter
Gain:11,19 dBI (@27,555 Mhz)
FB <26 dB
FR <22 dB
Impedance: 50 ohms, direct fed.
Power handling: >20 Kw
SWR below 1:1.1 > 100 Khz.
SWR below 2:1 > 750 Khz
Above the azimuth plot.
Above the freespace elevation plot.
Above the elevation plot at 18 meters height above average ground conditions.
The predicted SWR plot
- The antenna has a folded dipole as driven element.
- The distance between the two elements is 11 cm.
- The element diameters are: 22mm and 18 mm
- The 22mm part is 2,98 meters long and the 18 mm part makes up for the rest of the element.
- This antenna is designed with NEC 4. Do not try to model this antenna with a normal NEC2 engine. (standard eznec e.g.) You will get inaccurate results.
|
Element |
Length |
Distance |
|
Reflector |
5,560 |
|
|
Folded dipole |
5,170 |
0,59 |
|
Director 1 |
5,000 |
1,65 |
|
Director 2 |
4,920 |
3,15 |
|
Director 3 |
4,900 |
5,48 |
|
Director 4 |
4,860 |
7,35 |
|
Director 5 |
4,660 |
9,90 |
DO NOT CHANGE ELEMENT DIMENSIONS.
IF YOU NEED OTHER DIAMETERS PLEASE FEEL FREE TO ASK.
NOT FOR COMMERCIAL USE