• Public Gallery  • Help  
• Join Now!  • Log In  • Feature Tour
 holl_ands | Home > Bowties, Dipoles, Batwings & Rhombics > 
UHF Batwing - No Refl & Screen Grid Refl
UHF Batwing Antenna with No Reflector and 16"H x 12"W Screen Grid Reflector analyzed using 4nec2.
Based on 4nec2 files provided by user <300ohm>.

a) UHF Batwing - No Reflector
UHF Raw Gain = 4.6 to 5.6 to 5.1 dBi and SWR (300-ohms) under 2.1
Raw Gain is FLAT to within +/- 0.5 dB with Excellent SWR.

b) UHF Batwing + 16-in H x 12-in W Screen Grid Reflector at 5-in Separation
UHF Raw Gain = 8.9 to 9.2 to 7.3 dBi, F/B & F/R Ratio Min = 12.4 dB and SWR (300-ohms) under 2.8.
Raw Gain drops off about 2 dB on higher frequencies with minimally acceptable SWR.
F/B & F/R Ratios should improve with somewhat larger Reflector and 1-in vice 2-in Spacings
between Horizontal Wires.
Date(s): 16 Oct 2014. Album by holl_ands. 1 - 26 of 26 Total. 8739 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 65KB, 676x1024
1
UHF Batwing - No Reflector
3D View


Enlarge photo 2
enlarge 299KB, 1017x1024
2
UHF Batwing - No Reflector
Front View
[1 large square = 1.25 inches]


Enlarge Microsoft Word Document 3
enlarge 29KB, 791x1024
DOC3
UHF Batwing - No Reflector
4nec2 File


Enlarge photo 4
enlarge 143KB, 1024x690
4
UHF Batwing - No Reflector
UHF Raw Gain = 4.6 to 5.6 to 5.1 dBi


Enlarge photo 5
enlarge 187KB, 1024x690
5
UHF Batwing - No Reflector
UHF SWR (300-ohms) Under 2.1


Enlarge photo 6
enlarge 214KB, 1024x690
6
UHF Batwing - No Reflector
UHF Impedance


Enlarge photo 7
enlarge 318KB, 1024x1024
7
UHF Batwing - No Reflector
Azimuthal Pattern at 470 MHz


Enlarge photo 8
enlarge 314KB, 1024x1024
8
UHF Batwing - No Reflector
Azimuthal Pattern at 530 MHz


Enlarge photo 9
enlarge 320KB, 1024x1024
9
UHF Batwing - No Reflector
Azimuthal Pattern at 590 MHz


Enlarge photo 10
enlarge 314KB, 1024x1024
10
UHF Batwing - No Reflector
Azimuthal Pattern at 650 MHz


Enlarge photo 11
enlarge 314KB, 1024x1024
11
UHF Batwing - No Reflector
Azimuthal Pattern at 698 MHz


Enlarge photo 12
enlarge 310KB, 1024x1024
12
UHF Batwing - No Reflector
Azimuthal Pattern at 806 MHz


Enlarge photo 13
enlarge 124KB, 881x1024
13
UHF Batwing + Screen Grid Reflector
3D View


Enlarge photo 14
enlarge 307KB, 915x1024
14
UHF Batwing + Screen Grid Reflector
Front View
[1 large square = 1.25 inches]


Enlarge Microsoft Word Document 15
enlarge 34KB, 791x1024
DOC15
UHF Batwing + Screen Grid Reflector
4nec2 File


Enlarge photo 16
enlarge 180KB, 1024x690
16
UHF Batwing + Screen Grid Reflector
UHF Raw Gain = 8.9 to 9.2 to 7.3 dBi
UHF F/B & F/R Ratio Minimum = 12.4 dB


Enlarge photo 17
enlarge 184KB, 1024x690
17
UHF Batwing + Screen Grid Reflector
UHF SWR (300-ohms) Under 2.8


Enlarge photo 18
enlarge 219KB, 1024x690
18
UHF Batwing + Screen Grid Reflector
UHF Impedance


Enlarge photo 19
enlarge 310KB, 1024x1024
19
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 470 MHz


Enlarge photo 20
enlarge 304KB, 1024x1024
20
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 530 MHz


Enlarge photo 21
enlarge 310KB, 1024x1024
21
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 590 MHz


Enlarge photo 22
enlarge 305KB, 1024x1024
22
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 650 MHz


Enlarge photo 23
enlarge 307KB, 1024x1024
23
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 698 MHz


Enlarge photo 24
enlarge 311KB, 1024x1024
24
UHF Batwing + Screen Grid Reflector
Azimuthal Pattern at 806 MHz


Enlarge photo 25
enlarge 142KB, 583x1024
25
UHF Batwing + Screen Grid Reflector
Top View
Batwing to Screen Grid = 5-in
[1 large square = 1.25 inches]


Enlarge photo 26
enlarge 127KB, 464x1024
26
UHF Batwing + Screen Grid Reflector
Side View
Batwing to Screen Grid = 5-in
[1 large square = 1.25 inches]


 
 Select All.  
  Sign the Guestbook. There are no entries.