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Hi-VHF Figure-8 Twin Loops - NO Refl
Hi-VHF "Figure-8" Twin Circular Loops with NO Reflector analyzed using 4nec2.
Optimum size is 24-in Diameter, using QICT (Quarter-Inch Copper Tubing).

Hi-VHF Raw Gain = 5.6 to 6.4 dBi and SWR (300-ohms) Under 2.6.
Date(s): 15 July 2009. Album by holl_ands. 1 - 5 of 5 Total. 11021 Visits.
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Hi-VHF Twin (Figure8) Loops - Raw Gain
Optimum size is 24-in for 1/4-in Copper Tubing
Hi-VHF Raw Gain = 5.6 to 6.4 dBi

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Hi-VHF Twin (Figure8) Loops - SWR
Optimum size is 24-in for 1/4-in Copper Tubing
Hi-VHF SWR (300-ohms) Under 2.6
300-ohms is optimum Characteristic Impedance load.

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Hi-VHF Twin (Figure8) Loops - Impedance
Optimum size is 24-in for 1/4-in Copper Tubing

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HiVHF Circular Loops
Compare Single vs Twin (Figure8) Loops

Only a small increase in Gain.  Better use of
materials to use a Reflector Loop instead.

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DOC5
Hi-VHF Twin (Figure8) Circular Loops
Example 4nec2 file

 
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