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 holl_ands | Home > Bowties, Dipoles, Batwings & Rhombics > 
91XG Dipole ONLY & Dipole+First Director
Antennas Direct 91XG (aka XG91) Dipole (ONLY) analyzed using 4nec2.  XG91a.nec model originally from Ken Nist on hdtvprimer.com.
Determined Characteristic Impedance was 350-ohms (300-ohm load had nearly the SAME performance).

Dipole plus the closely coupled First Director also analyzed to show effect on Gain, SWR and Characteristic Impedance,
which was improved to 280-ohms (300-ohm load had nearly the SAME performance).

NOTE: There are several variations of the XG91/91XG from different manufacturers.
Carefully check your dimensions against Ken Nist's model...esp. if you think you have a 75-ohm balun.
Date(s): 20 Aug 2011. Album by holl_ands. 1 - 30 of 30 Total. 6500 Visits.
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Enlarge photo 1
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1
XG91 Dipole ONLY - 3D View
Showing Colorized Segmentation.


Enlarge photo 2
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2
XG91 Dipole ONLY - Front View
[1 small box = 0.25-inch]
[1 big box = 1.25-inch]


Enlarge photo 3
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3
XG91 Dipole ONLY - Top View
[1 small box = 0.25-inch]
[1 big box = 1.25-inch]


Enlarge photo 4
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4
XG91 Dipole ONLY
UHF Raw Gain


Enlarge photo 5
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5
XG91 Dipole ONLY - UHF SWR
Optimum Characteristic Impedance = 360-ohms


Enlarge photo 6
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6
XG91 Dipole ONLY
UHF SWR (300-ohms) is nearly SAME as 350-ohm


Enlarge photo 7
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7
XG91 Dipole ONLY
UHF SWR (75-ohms) is EXCESSIVE


Enlarge photo 8
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8
XG91 Dipole ONLY
UHF Impedance


Enlarge photo 9
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9
XG91 Dipole ONLY - Side View
[1 big box = 0.25-inch]


Enlarge photo 10
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10
XG91 Dipole ONLY
Azimuthal Pattern at 470 MHz


Enlarge photo 11
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11
XG91 Dipole ONLY
Azimuthal Pattern at 590 MHz


Enlarge photo 12
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12
XG91 Dipole ONLY
Azimuthal Pattern at 698 MHz


Enlarge photo 13
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13
XG91 Dipole ONLY
Azimuthal Pattern at 758 MHz


Enlarge photo 14
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14
XG91 Dipole ONLY
Azimuthal Pattern at 806 MHz


Enlarge Microsoft Word Document 15
enlarge 30KB, 791x1024
DOC15
XG91 Dipole ONLY
4nec2 File


Enlarge photo 16
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16
XG91 Dipole + First Director - 3D View
Showing Colorized Segmentation.


Enlarge photo 17
enlarge 66KB, 1152x170
17
XG91 Dipole + First Director - Front View
[1 small box = 0.25-inch]
[1 big box = 1.25-inch]


Enlarge photo 18
enlarge 67KB, 202x1024
18
XG91 Dipole + First Director - Top View
[1 small box = 0.25-inch]
[1 big box = 1.25-inch]


Enlarge photo 19
enlarge 155KB, 1152x611
19
XG91 Dipole + First Director
UHF Raw Gain


Enlarge photo 20
enlarge 180KB, 1152x611
20
XG91 Dipole + First Director - UHF SWR
Optimum Characteristic Impedance = 280-ohms


Enlarge photo 21
enlarge 180KB, 1152x611
21
XG91 Dipole + First Director
UHF SWR (300-ohms) is nearly SAME as 350-ohm


Enlarge photo 22
enlarge 171KB, 1152x611
22
XG91 Dipole + First Director
UHF SWR (75-ohms) is EXCESSIVE


Enlarge photo 23
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23
XG91 Dipole + First Director
UHF Impedance


Enlarge photo 24
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24
XG91 Dipole + First Director - Side View
[1 big box = 0.25-inch]


Enlarge photo 25
enlarge 306KB, 1024x1024
25
XG91 Dipole + First Director
Azimuthal Pattern at 470 MHz


Enlarge photo 26
enlarge 303KB, 1024x1024
26
XG91 Dipole + First Director
Azimuthal Pattern at 590 MHz


Enlarge photo 27
enlarge 303KB, 1024x1024
27
XG91 Dipole + First Director
Azimuthal Pattern at 698 MHz


Enlarge photo 28
enlarge 300KB, 1024x1024
28
XG91 Dipole + First Director
Azimuthal Pattern at 758 MHz


Enlarge photo 29
enlarge 313KB, 1024x1024
29
XG91 Dipole + First Director
Azimuthal Pattern at 806 MHz


Enlarge Microsoft Word Document 30
enlarge 30KB, 791x1024
DOC30
XG91 Dipole + First Director
4nec2 File


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