Above the freespace azimuth plot
Above the freespace elevation plot
Above the SWR diagram
Above the Gain and Front to back and Front to rear versus frequency
For: DX portion 11 meter band
Antenna Type: 4 el LFA YAGI
Designed by: G0KSC modified for 27 MHz by 19DX348 Jan 2016
Boom length: 5,17 Meter
Gain: 9,21 dBI (@27,555 MHz)
FB <20,69dB (H field)
FR <20,69 dB (H field)
Impedance: 50 Ohms.
SWR 2:1 > 1000 KHz.
SWR 1:1,1 > 300 KHz.
ELEMENT DIMENSIONS:
ELEMENTS DIAMETERS ARE: 20mm and 16mm in diameter. The center part of the element is 3,2 meter long and is made from the 20mm diameter tubing. And the 16mm is for the rest of the element lenght.
Do not change diameters, if you need other dimensions, or if you want to scale this antenna to another frequency..
Please feel free to ask !
ELEMENT: DISTANCE LENGHT:
REFLECTOR 0,000 5,606
RADIATOR 1 0,380 4,586
RADIATOR 2 1,425 4,586
Director 1 2,470 5,110
Director 2 5,170 4,730
FEEDING THE ANTENNA :
The antenna is 50 Ohms, the feedpoint is the radiator element closest to the reflector. A 1;1 balun is adviced !
For more information please visit G0KSC his website.