• Public Gallery  • Help  
• Join Now!  • Log In  • Feature Tour
 holl_ands | Home > Yagi Antennas > 
UHF 5-El FD-Yagi - OPTimized
UHF 5-Element Folded Dipole Yagi, OPTIMIZED using nikiml's Python Scripts, analyzed using 4nec2.
Gain, SWR F/B & F/B performance better than CM-4040 5-El FLAT Yagi.  
Optimized Boom Length = 22 inches.

UHF Raw Gain = 7.3 to 9.4 to 8.9 dBi, F/B & F/R Ratio Min. = 13.4 dB (FAIR) and SWR under 3.1 (FAIR).
Note well formed Azimuthal Antenna Pattern with 70-50 degree Beamwidth, deceasing with Frequency.

Nearly Bi-Directional Hi-VHF Gain = -0.5 to 0.4 dBi FORWARD and -0.4 to 0.6 dBi to REAR
is slightly HIGHER and nearly OMNI-Directional. But Hi-VHF SWR (300-ohms) is Very EXCESSIVE.

PS: Jointly Optimizing UHF and Hi-VHF should improve Hi-VHF performance, perhaps at expense of UHF.
Date(s): 17 Jan 2017. Album by holl_ands. 1 - 28 of 28 Total. 2798 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 52KB, 1024x704
1
UHF 5-El FD-Yagi - OPT
3D View


Enlarge photo 2
enlarge 88KB, 1152x309
2
UHF 5-El FD-Yagi - OPT
Front View
[1 large square = 1.25 inches]


Enlarge photo 3
enlarge 274KB, 1024x998
3
UHF 5-El FD-Yagi - OPT
Top View
[1 large square = 1.25 inches]


Enlarge photo 4
enlarge 199KB, 1152x701
4
UHF 5-El FD-Yagi - OPTimized
UHF Raw Gain = 7.3 to 9.4 to 8.9 dBi
F/B & F/R Ratio Minimum = 13.4 dB (GOOD)


Enlarge photo 5
enlarge 194KB, 1152x701
5
UHF 5-El FD-Yagi - OPTimized
UHF SWR (300-ohms) Under 3.1


Enlarge photo 6
enlarge 245KB, 1152x701
6
UHF 5-El FD-Yagi - OPTimized
UHF Impedance


Enlarge photo 7
enlarge 300KB, 1024x1024
7
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 470 MHz


Enlarge photo 8
enlarge 300KB, 1024x1024
8
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 530 MHz


Enlarge photo 9
enlarge 298KB, 1024x1024
9
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 590 MHz


Enlarge photo 10
enlarge 297KB, 1024x1024
10
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 650 MHz


Enlarge photo 11
enlarge 299KB, 1024x1024
11
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 698 MHz


Enlarge photo 12
enlarge 297KB, 1024x1024
12
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 806 MHz


Enlarge photo 13
enlarge 300KB, 1024x1024
13
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 470 MHz


Enlarge photo 14
enlarge 300KB, 1024x1024
14
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 530 MHz


Enlarge photo 15
enlarge 298KB, 1024x1024
15
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 590 MHz


Enlarge photo 16
enlarge 299KB, 1024x1024
16
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 650 MHz


Enlarge photo 17
enlarge 299KB, 1024x1024
17
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 698 MHz


Enlarge photo 18
enlarge 300KB, 1024x1024
18
UHF 5-El FD-Yagi - OPTimized
Elevation Pattern at 806 MHz


Enlarge Microsoft Word Document 19
enlarge 28KB, 791x1024
DOC19
UHF 5-El FD-Yagi - OPTimized
4nec2 File includes Dimensions


Enlarge Microsoft Word Document 20
enlarge 26KB, 791x1024
DOC20
UHF 5-El FD-Yagi - OPTimized
EVAL Summary of Performance


Enlarge HTML Document 21
enlarge 28KB, 791x1024
HTML21
UHF 5-El FD-Yagi - OPTimized
EVAL *.html Performance Summary


Enlarge photo 22
enlarge 120KB, 1152x415
22
UHF 5-El FD-Yagi - OPTimized
Hi-VHF Raw Gain = -0.5 to 0.4 dBi FORWARD
Slightly more Gain to REAR then FORWARD


Enlarge photo 23
enlarge 191KB, 1152x701
23
UHF 5-El FD-Yagi - OPTimized
Hi-VHF Raw Gain = -0.4 to 0.6 dBi to REAR
Hi-VHF F/B and F/R Ratio = 0.04 to 0.14 dB


Enlarge photo 24
enlarge 200KB, 1152x701
24
UHF 5-El FD-Yagi - OPTimized
Hi-VHF SWR (300-ohms) = 919 to 300
is EXCESSIVE


Enlarge photo 25
enlarge 299KB, 1024x1024
25
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 174 MHz


Enlarge photo 26
enlarge 305KB, 1024x1024
26
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 198 MHz


Enlarge photo 27
enlarge 310KB, 1024x1024
27
UHF 5-El FD-Yagi - OPTimized
Azimuthal Pattern at 216 MHz


Enlarge photo 28
enlarge 229KB, 1152x701
28
UHF 5-El FD-Yagi - OPTimized
Hi-VHF Impedance


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