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LoVHF Hourglass-Loop - No Reflector
Ch3-6 Optimized Hourglass-Loop Antenna (with NO Reflectors) analyzed using 4nec2,
with somewhat higher SWR on Ch2 and FM Band.

NO REFLECTOR RODS:
Ch3-6 Raw Gain = 3.8 to 5.4 dBi and SWR Under 2.7.

Wire Size is NOT critical for Hourglass-Loop.  Charts presume AWG8, but there is
very little change between using AWG12 or 1/2-in Copper Tube.

A CONSTRAINT was imposed to limit the HEIGHT of the Antennas to 84-inches (7-feet) MAX.
Date(s): 15 Oct 2013. Album by holl_ands. 1 - 8 of 8 Total. 9360 Visits.
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Ch3-6 Hourglass-Loop - No Reflector
3D View


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Ch3-6 Hourglass-Loop - No Reflector
Front View
[1 large square = 12.5 inches]


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Ch3-6 Hourglass-Loop - No Reflector
Azimuthal Pattern at 85 MHz (Ch6)


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Ch3-6 Hourglass-Loop - No Reflector
Ch3-6 Raw Gain = 3.8 to 5.4 dBi
and up to 6.0 dBi in FM Band


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Ch3-6 Hourglass-Loop - No Reflector
SWR (300-ohms) Under 1.9 on Ch6
and Under 2.7 on Ch3-6.


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Ch3-6 Hourglass-Loop - No Reflector
Ch2-6 + FM Impedance


Enlarge Microsoft Word Document 7
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Ch3-6 Hourglass-Loop - No Reflector
4nec2 File


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DOC8
Ch3-6 Hourglass-Loop - No Reflector
Contents of Python Control *.bat Script


 
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