Yagi Designs by Derek Hilleard G4CQM (2017)


  • All weather high performance 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

6M Band - 50MHz

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)DEQ
6CQM5UC0.472.860928.6417.0SD6.3
WS65055!0.553.30560809.3417.2SD6.69
WS650650.653.956809.5920.7SD4.3
6CQM6UX0.714.26567210.322.9SD21.69
WS66075!0.754.5527210.420.6SD22.11
WA66080!0.804.8526410.917.6SD15.56
WS66082!0.824.9526810.720.9SD8.8
WS671161.166.9548561225.9SD15.1
PA0712L1.237.35445212.221.5SD16.3
WS681621.629.672404813.224SD15.3

4M Band - 70MHz

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)DEQ
4CQM5UC0.472.00960928.6716.9SD5.18
WA45055!0.552.36056809.417.1SD5.27
WS450650.652.78456809.620.8SD4
WS46075!0.753.212527210.420.3SD18.2
WS460820.823.498526810.720.7SD7.39
WS47116!1.164.9485611.725.9SD20.02
PA0712H1.235.247445212.221.7SD10.7
WS481791.797.651404413.519.4SD4

2M Band - 144MHz

DesignλBoom (m)BW Az°BW El°Gain (dBi)F/B (dB)* Ta (K)* G/TaDEQ
WS250650.651.35456809.5419.6298.7-9.16SD3.51
WS26075!0.751.565567210.322.4230.3-7.53SD21.5
WS260820.821.700526810.621.9237.8-7.18SD10.27
WS27116!1.162.41748561227.4233.1-5.96SD17.7
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
WA9XX!1.793.725404813.124.8228.2-4.55SD19.76
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
144NX14!3.857.980323216.037.5221.7-1.58SD18.7
XX144.08.3283216.231.4221.4-1.41SD18.6
WS2154464.469.25283216.528.3223.4-1.27SD10.2

70CM Band - 432MHz

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
WS718562!5.623.9282817.53230.78.52SD21.7

 

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
Note ! = 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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