Yagi Designs by G4CQM


A superior range of AOWA yagi designs by Derek Hilleard G4CQM (2017)

 

  • All weather high performance AOWA yagis for 50/70/144/432MHz... Average Q-factor <25
  • For -3dB beamwidth (BW) see tables below and/or click onto Vertical & Horizontal Plane images
  • Build dimensions and optimal/precise stacking distances see .nec files
  • The following presentation was carried out using the free and powerful 4nec2 by Arie Voors

 

Choosing the right design and element sizes

Just to be clear most designs listed here require the following size tubing for the elements... DE 5/8th Inch (15.875mm) OD tube, whilst the parasitic elements are all 3/16th Inch (4.7625mm) OD rod, and so can use our high quality plastic moldings! However, there are a few designs listed that use different size tubing for the elements. It is very important therefore to double check the .nec files to ascertain the correct build dimensions.

 

6M (50MHz) Band

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)DEQ
6CQM5UC0.472.860928.6417.0SD6.3
WS650550.553.30560809.3417.2SD6.69
WS650650.653.956809.5920.7SD4.3
6CQM6UX0.714.26567210.322.9SD21.69
WS660750.754.5527210.420.6SD22.11
WA660800.804.8526410.917.6SD15.56
WS660820.824.9526810.720.9SD8.8
WS671161.166.9548561225.9SD15.1
PA0712L1.237.35445212.221.5SD16.3
WS681621.629.672404813.224SD15.3

 

4M (70MHz) Band

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)DEQ
4CQM5UC0.472.00960928.6716.9SD5.18
WA450550.552.36056809.417.1SD5.27
WS450650.652.78456809.620.8SD4
WS460750.753.212527210.420.3SD18.2
WS460820.823.498526810.720.7SD7.39
WS471161.164.9485611.725.9SD20.02
PA0712H1.235.247445212.221.7SD10.7
WS481791.797.651404413.519.4SD4

 

2M (144MHz) Band

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)* Ta (K)* G/TaDEQ
WS250650.651.35456809.5419.6298.7-9.16SD3.51
WS260750.751.565567210.322.4230.3-7.53SD21.5
WS260820.821.700526810.621.9237.8-7.18SD10.27
WS271161.162.41748561227.4233.1-5.96SD17.7
WS271231.232.550445612.125.6233.6-5.80SD10.19
WS281621.623.357404813.126.7232.6-4.95SD17.4
CQM8C41.683.480445212.826.7229.4-4.98SD11.3
WAXX8S1.793.725404413.419.8243.6-4.61SD4.57
WA9XX1.793.725404813.124.8228.2-4.55SD19.76
CQM9C42.134.428404413.728.2230.6-4.11SD9.4
CQM12UX2.344.835404414.123.1228.8-3.76SD5.6
CQM10C42.364.890384214.125.6222.26-3.84SD15.3
CQM02113.006.238323615.234.9226.7-2.40SD23.89
144NX13S3.857.980323216.027.7218.3-1.57SD23.9
144NX143.857.980323216.037.5221.7-1.58SD18.7
XX144.08.3283216.231.4221.4-1.41SD18.6
WS2154464.469.25283216.528.3223.4-1.27SD10.2

 

70cm (432MHz) Band

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)* Ta (K)* G/TaDEQ
4323WL503.02.092323615.330.236.45.63SD16.4
WS7154464.463.093282816.728.234.17.33SD9.2
WS7185625.623.9282817.53230.78.52SD21.7

 

Explanations:
Note * = 4 x Yagis (f = 144.1MHz or 432.1MHz)
T_sky = 1000K and T_earth = 200K
Elevation angle °30 proposed by DJ9BV
Q = Q-factor average over a selected 2MHz bandwidth
Some alternative or special element sizes available, check .nec files!
SD = Split Dipole

 


G6HKS - Yagi Kits & Parts...

  • THESE YAGI ANTENNA DESIGNS ARE NOT FOR COMMERCIAL USE OF ANY KIND WITHOUT PRIOR CONSENT!
  • Private experimenters are free to use these designs for their own personal enlightenment. However, no
    guarantee or warranty is offered or implied.
  • MY WEBSITE DOES NOT USE COOKIES, EXTERNAL LINKS MIGHT!

 

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