• Public Gallery  • Help  
• Join Now!  • Log In  • Feature Tour
 holl_ands | Home > Curtain Quad Antennas > 
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. 4741 Visits.
Start SlideshowTo order prints and photo-products: 1. Select photos. 2. Click Order. 3. Select products.Select images and click to download to your computer 
Enlarge photo 1
enlarge 73KB, 810x1024
1
UHF 21El Curtain Array - NO Refl
3D View


Enlarge photo 2
enlarge 203KB, 790x1024
2
UHF 21El Curtain Array - NO Refl
Front View
[1 large square = 12.5 inches]


Enlarge photo 3
enlarge 236KB, 1024x752
3
UHF 21El Curtain Array - NO Refl
Front View DETAILS
[1 large square = 5 inches]


Enlarge photo 4
enlarge 175KB, 1024x690
4
UHF 21El Curtain Array - NO Refl
UHF Raw Gain Max = 17.2 dBi


Enlarge photo 5
enlarge 202KB, 1024x690
5
UHF 21El Curtain Array - NO Refl
UHF Impedance (75-ohms) Min. on 584 MHz
with 20 MHz Usable Bandwidth


Enlarge photo 6
enlarge 247KB, 1024x690
6
UHF 21El Curtain Array - NO Refl
UHF Impedance


Enlarge photo 7
enlarge 207KB, 1024x690
7
UHF 21El Curtain Array - NO Refl
UHF Impedance (50-ohms) Min. on 584 MHz
not as Optimum as 75-ohms.


Enlarge photo 8
enlarge 209KB, 1024x690
8
UHF 21El Curtain Array - NO Refl
UHF Impedance (150-ohms) is BEST for Broadband Performance.


Enlarge photo 9
enlarge 197KB, 1024x690
9
UHF 21El Curtain Array - NO Refl
UHF Impedance (300-ohms) isn't as Good
as 150-ohms for Broadband Performance.


Enlarge photo 10
enlarge 304KB, 1024x1024
10
UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 539 MHz


Enlarge photo 11
enlarge 310KB, 1024x1024
11
UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 584 MHz


Enlarge photo 12
enlarge 311KB, 1024x1024
12
UHF 21El Curtain Array - NO Refl
Azimuthal Pattern at 596 MHz


Enlarge Microsoft Word Document 13
enlarge 30KB, 791x1024
DOC13
UHF 21El Curtain Array - NO Refl
4nec2 File


 
 Select All.  
  Sign the Guestbook. Displaying 1 of 1 entries.
Interesting update from the original article. still have'nt work out the sizing to build one ...
 - 
Peter Jenner, Mon, 9 May 2022 11:09AM