Above the freespace azimuth plot
Above the freespace elevation plot
Above the SWR Bandwidth
Above the GAIN FB&FR response to frequency.
For: Super Bowl/ CB channels 11 meter band
Antenna Type: 5el YAGI OWA
Designed by: 19DX348 version 1.01 feb 2025
Boom length: 7,75 Meter
Gain: 10,42 dBI (@27,1 MHz)
Front to back: <22 dB (H field)
Front to rear: <22 dB (H field)
Impedance: 50 ohms, direct fed
SWR 1:1.1 > 400 KHz.
SWR 2:1 > 1500 KHz
Element dimensions:
The element diamters are 5/8 inch and 1/2 inch diameter.
(the center part could also be made from 3/4 inch with resulting in slighlty better SWR bandwidth)
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
Feeding the antenna:
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 for all Yagi’s.