1,74 M 3el F-yagi

For:             DX portion 11 meter band
Antenna Type:    3el  F-YAGI
Folded Dipole radiator
Designed by:    HPSD version 1.01 Nov 2011
Boom length:     1,74 Meter
Gain:         7,2 dBI (@27,555 Mhz)
FB            <26 dB
FR            <22 dB
Impedance:         50 ohms, direct fed
SWR below 1:1.1     > 150 Khz.
SWR below 2:1    > 800 Khz

Above the azimuth plot. In 7,2 dBI

Above the freespace elevation plot

All elements are made out of 25mm, 20 and 16 mm

The 25mm is the centerpiece and 2 meter  long,

The 20mm is 1 meter long and is inserted 15cm inside the 2 meter tube. (85cm visible)

The 16mm tube is inserted in the 20mm tube and needs to be as long as the total element length.

Distances:

reflector – radiator = 0,425

Reflector- director1 = 1,74 Meter

Length:

Reflector:  2,845 Meter x 2 (total 5,69 meter)

Radiator: 2,635 Meter x2 (total 5,27 Meter)

Director: 2,51 Meter x2 (total 5,02 Meter)

The folded dipole elements are 11cm seperated.

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