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K9AY design & Phased array

This is a short technical article about K9AY loop design and simulations. You can select some size or download MMANA files and play with your own one :) You can try different shapes, height and load resistance. You can better understand how it works and how you can build it better.

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K9AY loop size design
K9AY in phased array


Dimensions for variants for 160m - 40m

dimension k9ay loop size by qro.cz hamparts.shop



k9ay design loop parameters by qro.cz hamparts.shop

Universal small variant

k9ay design small variant by qro.cz hamparts.shop

160m and 80m variant

- MMANA file of my small design for 160m and 80m

k9ay design for 160 and 80m by qro.cz hamparts.shop

Very small variant for 160m - 40m

  • MMANA 40m file
  • - results 160m for Rload resistor 390 Ohm, Conduct 5 mS/m ::: G = -38dBi F/B = 18dB EL = 31°
  • - "GAIN" on 160m is very low - preamp is necessary :)
  • - results 80m for Rload resistor 390 Ohm, Conduct 5 mS/m ::: G = -27dBi F/B = 17dB EL = 34°
    - results 40m for Rload resistor 470 Ohm, Conduct 5 mS/m ::: G = -16dBi F/B = 21dB EL = 38°

k9ay design 40m qro.cz hamparts.shop

k9ay design 40m qro.cz hamparts.shop

Optimized for 160m

  • MMANA 160m file
  • - results for Rload resistor 470 Ohm, Conduct 5 mS/m ::: G = -25dBi F/B = 25dB EL = 32°

k9ay design 160m qro.cz hamparts.shop

k9ay design 160m qro.cz hamparts.shop

Optimized for 80m

  • MMANA 80m file
  • - results for Rload resistor 570 Ohm, Conduct 5 mS/m ::: G = -13dBi F/B = 21dB EL = 37°

k9ay design 80m qro.cz hamparts.shop

k9ay design 80m qro.cz hamparts.shop

Optimized for 40m

  • MMANA 40m file
  • - results for Rload resistor 470 Ohm, Conduct 5 mS/m ::: G = -16dBi F/B = 21dB EL = 38°

k9ay design 40m qro.cz hamparts.shop

k9ay design 40m qro.cz hamparts.shop


K9AY in phased array

There are examples of phased arrays. In the broadside and End-fire configuration. Phasing into the array could help you to obtain better parameters.

Single K9AY loop

There is example of the single loop at 160m

k9ay antenna pattern broadside array by qro.cz hamparts.shop

Broadside 2el K9AY

Broadside array reduces azimuth antenna pattern. There is example for space S = 30m

k9ay antenna pattern broadside array by qro.cz hamparts.shop



k9ay broadside array by qro.cz hamparts.shop

Broadside 4el K9AY

Another simulation for the broadside array. There is example for 4el K9AY space S = 30m - some more optimization could be done there.

k9ay antenna pattern broadside array by qro.cz hamparts.shop



End-Fire 2el K9AY

End-Fire array could help you with F/B and nulling some signals. There could be different phasing angles to do it. You can find some calculations also at 2el End-Fire beverage page

k9ay antenna pattern end fire by qro.cz hamparts.shop

k9ay end fire array by qro.cz hamparts.shop

All combinations in one

k9ay antenna pattern end fire broadside comparison by qro.cz hamparts.shop

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