3 element 28MHz OP-DES Yagi (2.1m)

3 element 28MHz OP-DES Yagi (2.1m)
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  • Brand: InnovAntennas
  • Product Code: 3 element 28MHz OP-DES Yagi (2.1m)
  • Availability: Not in stock
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A 3 element wideband 28-28.7MHz OP-DES (Opposing Phase Driven Element System) Yagi

The OP-DES is the newest in patent technology produced by InnovAntennas and is specifically designed for maximum performance, wide-band HF applications. Read more about the OP-DES Yagi Here. InnovAntennas use the latest in Electromagnetic Design Technology to ensure the very best results and the OP-DES Yagi is proof of that!

This antenna has a flat SWR curve covering 28-28.800MHz at 1.3:1 SWR.


Gain: 7.47dBi @ 28.500MHz

F/B: 13.44dB @ 28.500MHz

Peak Gain: 7.50dBi

Gain at 10m above Ground: 12.64dBi

Peak F/B: 14.23dB

Power Rating: 5kw

SWR: Below 1.3:1 from 28.000MHz to 28.800MHz


Stacking Distance: 5.0-6.5m ( 6.0m recommended)

2 Stacked Gain @ 6.0m spacing: 10.51dBi

2 Stacked F/B: 12.20dB

2 Stacked Gain @ 6.0m Spacing 10m above ground: 15.43dBi

Boom Length: 2.1m

Weight: 3.70Kg / 8.17LB

Turning Radius: 2.91m / 9.54ft

Wind Loading: 0.2 Square Metres / 2.19 Square feet

Wind Survival: 161KPH / 100MPH - A 125MPH (HD) version available upon request

Other options available if higher wind loading/survival is required.



This antenna is made 5/8 inch (15.88mm) center elements and 1/2 inch (12.7mm) outer elements with the OP-DES end sections 3/8 inch (9.525mm). The antenna has fully insulated elements which will ensure continuous, high performance for many years to come. Boom to mast brackets are included with all antennas which will support 2 inch (50mm) masts.  Boom is 1.5 inch (38.1mm) square 16SWG aluminum.


Our antennas are constructed with the best quality materials in order that the best mechanical construction can be achieved, not the cheapest and most profitable! Even a digital caliper is used (with an accuracy of .01mm) to measure the elements during production to ensure they are within 0.2mm of what they should be, this ensures they work as well as our software model predicts.

Note: much development time has gone into our antennas, not just on basic electromagnetic design, we are able to model the effect of insulators, booms and other objects to ensure the make up of our antennas have least effect on performance and pattern degradation. More information can be found here

  • Marine grade Stainless Steel Fittings
  • Original Stauff Insulation clamps
  • Mill finished boom and elements for highest levels of accuracy


Azimuth Plot


Elevation Plot


Single 3 element OP-DES up 10m above ground


2 x 3el OP-DES Yagi 6m apart with the bottom antenna 10m above ground


The 3el 28MHz OP-DES Element Layout - how the OP-DES Yagi looks



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