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UHF 21El Curtain Array - NO Refl
UHF 21-Element Curtain Array (NO Reflector) analyzed using 4nec2 after RESCALING Wi-Fi version
posted by Ross Anderson, W1HBQ.  Also corrected AGT=1.0 after fixing SOURCE Wire Statement error.

Rescale ended up with AWG5 Wire Size, but as small as AWG10 can be used with 75-ohm NARROWBAND
mode, and with 150-ohm BROADBAND mode, upgrade to 1/4-in Copper Tubing is recommended.
Date(s): 20 Oct 2014. Album by holl_ands. 1 - 13 of 13 Total. 4752 Visits.
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UHF 21El Curtain Array - NO Refl
3D View

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UHF 21El Curtain Array - NO Refl
Front View
[1 large square = 12.5 inches]

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UHF 21El Curtain Array - NO Refl
Front View DETAILS
[1 large square = 5 inches]

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UHF 21El Curtain Array - NO Refl
UHF Raw Gain Max = 17.2 dBi

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UHF 21El Curtain Array - NO Refl
UHF Impedance (75-ohms) Min. on 584 MHz
with 20 MHz Usable Bandwidth

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UHF 21El Curtain Array - NO Refl
UHF Impedance

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UHF 21El Curtain Array - NO Refl
UHF Impedance (50-ohms) Min. on 584 MHz
not as Optimum as 75-ohms.

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UHF 21El Curtain Array - NO Refl
UHF Impedance (150-ohms) is BEST for Broadband Performance.

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UHF 21El Curtain Array - NO Refl
UHF Impedance (300-ohms) isn't as Good
as 150-ohms for Broadband Performance.

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UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 539 MHz

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UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 584 MHz

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UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 596 MHz

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UHF 21El Curtain Array - NO Refl
4nec2 File

 
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Interesting update from the original article. still have'nt work out the sizing to build one ...
 - Peter Jenner, Mon, 9 May 2022 11:09AM