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2 - Phased Verticals
The stacking box can be used to feed three vertical antennas in a four pattern array. In this
arrangement the three antennas are each individually 1/4-wave resonant antennas. The center # 2
passive element must be directly grounded to a good ground system at all times. Elements #1 and
#3 are then fed in various phase relationships. The following patterns are for three 1/4-wave
elements over perfect ground.
Figure 7
shows the proper radial system for three verticals with the
radial systems bonded together where they would intersect.
Elements 1 and 3 out-of-phase (in this special case middle element has no current):
Figure 6
Figure 7 Figure 8
EZNEC+ ver. 5.0
--------------- SOURCE DATA ---------------
Frequency = 7.1 MHz
Source 1 Voltage = 190.7 V at 18.03 deg.
Current = 4.136 A at 0.0 deg.
Impedance = 43.84 + J 14.27 ohms
Power = 750 watts
SWR (50 ohm system) = 1.392 (75 ohm
system) = 1.802
Source 2 Voltage = 190.7 V at -161.97 deg.
Current = 4.136 A at 180.0 deg.
Impedance = 43.84 + J 14.27 ohms
Power = 750 watts
SWR (50 ohm system) = 1.392 (75 ohm
system) = 1.802
Total applied power = 1500 watts
