For: Super Bowl CB 11 meter band
Antenna Type: 5el YAGI OWA
Feedsystem: 50 Ohms direct fed
Designed by: 19DX348 version 1.01 feb 2025
Boom length: 7,75 Meter
Gain: 10,42 dBI (@27,1 Mhz)
FB <22 dB (H field)
FR <22 dB (H field)
Impedance: 50 ohms, direct fed
SWR below 1:1.1 > 400 Khz.
SWR below 2:1 > 1500 Khz
Above the freespace azimuth plot
Above the freespace elevation plot
Above the SWR Bandwidth
Above the GAIN FB&FR response to frequency.
ELEMENTS DIAMETER ARE: 3/4 inch and 1/2 inch diameter.
The center part of the element is 1,8288 meter long. And the 1/2 inch for the rest of the element lenght. (this is what maco uses)
Do not change diameters, if you need other dimensions,
Or if you need to shift this yagi in frequency, please feel free to ask
ELEMENT: DISTANCE LENGHT:
REFLECTOR 0 5,704
RADIATOR 1,278 5,440
DIRECTOR 1 2,353 5,162
DIRECTOR 2 5,020 5,160
DIRECTOR 3 7,747 4,960
The impedance of the antenna is 50 Ohms and direct feed can be applied.
It is a must to always use A RF choke or 1;1 balun.