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Ch14-19 18El FD-Yagi + 20RR Corner - OPT
Ch14-19 21-Element Folded Dipole Yagi with (20 Reflector Rod) Corner Reflector analyzed
using 4nec2.  Dimensions were determined using nikiml's Python Optimization Scripts,
incl. Corner Angle and location of the Yagi's Reflector relative to Corner (+/- 6 inches),
resulting in Yagi Reflector (and hence entire Yagi) being offset 2.75-in Forward of the
Corner Reflector's (imaginary) Apex.

Boom Length = 121-in, Reflector Rod Width=35.8-in, Corner Angle=41.8-deg
and Xsep=5.6-in, Rod-Rod Separation (Projection onto the X-Axis).

Ch14-19 Raw Gain = 17.8 to 18.0 dBi, F/B & F/R Ratio Min=23.7 dB & SWR (300-ohms) under 1.7.
Date(s): 23 Sep 2013. Album by holl_ands. 1 - 13 of 13 Total. 4217 Visits.
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Enlarge photo 1
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Ch14-19 18El FD Yagi + 20RR Corner
3D View


Enlarge photo 2
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Ch14-19 18El FD Yagi + 20RR Corner
Front View
[1 large square = 12.5 inches]


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Ch14-19 18El FD Yagi + 20RR Corner
Top View
[1 large square = 12.5 inches]


Enlarge photo 4
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Ch14-19 18El FD Yagi + 20RR Corner
Ch14-19 Raw Gain = 17.8 to 18.0 dBi
Ch14-19 F/B & F/R Ratio Min=23.7 dB


Enlarge photo 5
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5
Ch14-19 18El FD Yagi + 20RR Corner
Ch14-19 SWR (300-ohms) Under 1.7


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Ch14-19 18El FD Yagi + 20RR Corner
Ch14-19 Impedance


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Ch14-19 18El FD Yagi + 20RR Corner
Ch14-19 Raw Gain DETAIL


Enlarge Microsoft Word Document 8
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DOC8
Ch14-19 18El FD Yagi + 20RR Corner
4nec2 File


Enlarge photo 9
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9
Ch14-19 18El FD Yagi + 20RR Corner
Side View
[1 large square = 12.5 inches]
Yagi Reflector (and hence
entire Yagi) is offset 2.75-in Forward
of Corner Reflector's (imaginary) Apex.


Enlarge photo 10
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10
Ch14-19 18El FD Yagi + 20RR Corner
Azimuthal Pattern at 470 MHz


Enlarge photo 11
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Ch14-19 18El FD Yagi + 20RR Corner
Azimuthal Pattern at 494 MHz


Enlarge photo 12
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Ch14-19 18El FD Yagi + 20RR Corner
Azimuthal Pattern at 518 MHz


Enlarge Microsoft Word Document 13
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DOC13
Ch14-19 18El FD Yagi + 20RR Corner
Contents of Python Control *.bat (text) File


 
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