9,90 M 7el F-yagi 11,19 dBI

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

 

WordPress theme: Kippis 1.15