WILL MODEL THIS ANTENNA IN ANY TUBE SIZE OR TAPER SECHDULE FOR YOU, CONTACT ME VIA EMAIL
This is a high-gain, wideband OWA (Optimised Wideband Array) Yagi
which covers the 10m band with an SWR of less than1.1:1 from
28-28.900MHz. It is a non-crtical antenna so both metric and imperial sized tubing can be used with the same dimensions. This antenna has a two stage taper.
This Antenna has been modelled using NEC4 and confirmed by FEKO.
This is thousands of dollars of the very latest antenna design
software available and the results are highly accurate. When loading
into your software, you will see similar SWR but not the same. Please
do not alter the model, build to these dimensions for the best
Contact me if you are unsure what correction (if any) you
require for the element holders/stand-offs you will use or any other
questions you may have.
The 6OWA21OS (15m version of this antenna) by Eantennas of Spain (produced under license)
Also read 'An Intro to OWA Yagis' and also 'Creating a Balun'
Antenna Layout and Construction:
11.55dBi @ 28.500MHz
20.41dB @ 28.500MHz
SWR: Below 1.1.1 from 28MHz to 28.900MHz
Construction details / Taper schedule
Refer to the above drawing.
European version tube diameter
Mid Section: 20mm, Outer Section: 15mm
UK/USA version tube diameter
Mid Section: 3/4 inch, Outer Section: 5/8 inch
Antenna Dimensions For either UK/USA sized tubing or European/metric sized tubing
Spacing End Section Length (All below sizes in Metres)
Reflector 0 1 .9195
DE1 1.345 1 .8685
D1 2.071 1.7315
D2 4.359 1.6785
D3 7.664 1.6345
D4 10.623 1.5785
Gain: 13.53dBi (18.54dBi 20m above real ground)
Gain: 14.27dBi (19.49dBi 20m above real ground)
Azimuth Plot of this super antenna
Elevation plot of this antenna
Elevation plot of this antenna at 20M above ground
2 x 6el at 6m spacing ( bottom antenna 20m up)
Any questions, please ask!