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14MHz 7el OWA Yagi

A 7 element OWA Yagi for 14MHz with a 24.831mtr boom

Revised September 2010 v1.0

Premium commercial versions of this antenna at Innovantennas

 

I 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 whole of the 20m band with an SWR of less than1.25:1. It has options with both UK/USA and European sized tube and has a 4 section 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 results.

Contact me if you are unsure what correction (if any) you require forthe element holders/stand-offs you will use or any other questions you may have.

 

Also read 'An intro to OWA Yagis' and 'Creating a Balun'

 

Antenna Layout and Construction:


 

Performance

12.05dBi @ 14.200MHz

23.86dB @ 14.200MHz

SWR: Below 1.25:1 from 14MHz to 14.350MHz

 

Construction details

 

Refer to the above drawing.


Antenna Dimensions for UK/USA and European sized tubing

Taper: inner Section, 1.25 inch or 30mm tube (total length 2.2m). Mid Section 1 inch or 25mm tube,  Outer section 3/4 inch or 20mm tube. End sections as per below schedule ( 5/8 inch or 16mm tube).

 

                            Spacing                  End Section Length   (All below sizes in Metres)

Reflector                0                              2.030

DE1                      3.255                        1.935

D1                        4.313                         1.653

D2                        7.197                         1.634

D3                       12.041                        1.544

D4                       18.509                        1.477

D5                       24.831                        1.299

 

 

Polar Plots

 

Azimuth Plot of this super antenna

 

 

Elevation plot of this antenna

 

 

Elevation plot of this antenna at 20M above ground

 

 

SWR Plot

 


Any questions, please ask!

 

Justin G0KSC

 
 
 
 

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