6 elements OWA Yagi for 91DD018
Picture kindly provided by 91DD018
@ The Azimuth and Elevation plots at 27,555 10,02 dBi gain and 25 dB Front to back ratio
@ 28,000 MHz The azimuth and elevation plots 10,20 dBi gain and 29,81 Front to back ratio
@28,400 Mhz 10,27 dBi gain and 20,53 front to back ratio
Above the 1:1.1 band SWR plot.
Above the 2;1 SWR response.
Above the Gain, Front to Back and Front to rear respons versus frequency
Above the Antenna `Q` factor over 1 MHz.
If the Q factor is below 15 over a wide range of frequencies above and below the operating band, these
are very good stable antennas.
Q factors between 15 and 30 over a wide range of frequencies above and below the operating range
represent acceptable values for slightly less stable antennas.
Q factors between 30 and 50 indicate that they are relatively unstable antennas, although often in some
narrow part of the range they can have a lower Q factor.
Q factors over 50, regardless of the possible narrow parts of the lower Q band, represent extremely
unstable antennas. (SOURCE: YU1AW)
A Very stable antenna !
For: CB and 10 METERS
Antenna Type: 6el OWA Yagi
Designed by: 19DX348 version (1999) update 1.02 March 2025
Boom length: 7,22 Meter
Gain: 10,02 dBI (@27,555 MHz)
FB <25 dB (H-field)
FR <22 dB (H-field)
Impedance: 50 ohms, direct fed
SWR 1:1.1 > 1000 KHz.
SWR 2:1 > 2200 KHz
Element dimensions:
The elements are made from 22 mm 3 meter long center pieces and the rest of the elements are made from 18 mm (element tips)/
If you need other diameters please mail !
Element Length Distance
Reflector 5,590 m 0 m
Radiator 5,360 m 1,33 m
Director 1 5,030 m 1,907 m
Director 2 4,874 m 3,452 m
Director 3 4,874 m 4,965 m
Director 4 4,706 m 7,220 m
Please also see the site of Dave 91 DD 018