H+U 4-Bay Loop RLH4


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H+U 4-Bay Loop RLH4 - No Refl

Hi-VHF + UHF 4-Bay + Loop (RLH4) + No Reflector analyzed using 4nec2 after determining
Dimensions using nikiml's Python Optimization Scripts. Two versions are presented,
the latest, best version first and the original superseded version next:

a) Hi-VHF + UHF 4-Bay (Whiskers = 9.8") with Hi-VHF Resonator Loop (22.7" H x 22.6") + No Reflector:

UHF Raw Gain = 9.4 to 12.4 dBi and SWR (300-ohms) is Under 2.7 [EXCELLENT].
Hi-VHF Raw Gain = 5.5 to 5.9 dBi and SWR (300-ohms) is Under 2.7 [EXCELLENT].

Compares favorably to FF4, Free Form 4-Bay (NO Refl.), but RLH4 has lost 1.5 to 0.3 dB UHF Gain,
in exchange for 1.6 to 2.2 higher Hi-VHF Gain and BOTH SWR's under 2.7 [EXCELLENT]:

===================================
Original version has been deleted:

b) Hi-VHF + UHF 4-Bay (Whiskers = 10.125") with Hi-VHF Resonator Loop (20.0" H x 22.625") + No Reflector:

UHF Raw Gain = 9.7 to 12.4 dBi and SWR (300-ohms) is Under 2.4 [EXCELLENT].
Hi-VHF Raw Gain = 5.0 to 5.6 dBi and SWR (300-ohms) = 2.4 to 3.4 is a Bit High on Higher Channels.

Date(s): 21 Mar 2015. Album by holl_ands. 1 - 31 of 31 Total. 9359 Visits.

enlarge 86KB, 653x1024 1 H+U 4-Bay Loop RLH4 - No Refl 3D View	enlarge 216KB, 696x1024 2 H+U 4-Bay Loop RLH4 - No Refl Front View [1 large square = 5 inches] Bowtie Tips are TOUCHING, which become 4 continuous Zig-Zag Structures (like G-H)	enlarge 94KB, 353x1024 3 H+U 4-Bay Loop RLH4 - No Refl Top View [1 large square = 2.5 inches] Loops are 0.5-in Behind Bowties
enlarge 190KB, 1152x662 4 H+U 4-Bay Loop RLH4 - No Refl UHF Raw Gain = 9.4 to 12.4 dBi	enlarge 202KB, 1152x662 5 H+U 4-Bay Loop RLH4 - No Refl UHF SWR (300-ohms) Under 2.7	enlarge 238KB, 1152x662 6 H+U 4-Bay Loop RLH4 - No Refl UHF Impedance
enlarge 320KB, 1024x1024 7 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 470 MHz	enlarge 321KB, 1024x1024 8 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 530 MHz	enlarge 330KB, 1024x1024 9 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 590 MHz
enlarge 323KB, 1024x1024 10 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 650 MHz	enlarge 321KB, 1024x1024 11 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 698 MHz	enlarge 320KB, 1024x1024 12 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 806 MHz
enlarge 312KB, 1024x1024 13 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 470 MHz	enlarge 316KB, 1024x1024 14 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 530 MHz	enlarge 330KB, 1024x1024 15 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 590 MHz
enlarge 323KB, 1024x1024 16 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 690 MHz	enlarge 327KB, 1024x1024 17 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 698 MHz	enlarge 323KB, 1024x1024 18 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 806 MHz
enlarge 190KB, 1152x662 19 H+U 4-Bay Loop RLH4 - No Refl Hi-VHF Raw Gain = 5.5 to 5.9 dBi	enlarge 210KB, 1152x662 20 H+U 4-Bay Loop RLH4 - No Refl Hi-VHF SWR (300-ohms) Under 2.7	enlarge 236KB, 1152x662 21 H+U 4-Bay Loop RLH4 - No Refl Hi-VHF Impedance
enlarge 328KB, 1024x1024 22 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 174 MHz	enlarge 328KB, 1024x1024 23 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 198 MHz	enlarge 331KB, 1024x1024 24 H+U 4-Bay Loop RLH4 - No Refl Azimuthal Pattern at 216 MHz
enlarge 319KB, 1024x1024 25 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 174 MHz	enlarge 319KB, 1024x1024 26 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 198 MHz	enlarge 323KB, 1024x1024 27 H+U 4-Bay Loop RLH4 - No Refl Elevation Pattern at 216 MHz
enlarge 36KB, 791x1024 28 H+U 4-Bay Loop RLH4 - No Refl 4nec2 File contains Summary of Dimensions	enlarge 27KB, 791x1024 29 H+U 4-Bay Loop RLH4 - No Refl EVAL Results Text File	enlarge 46KB, 791x1024 30 H+U 4-Bay Loop RLH4 - No Refl EVAL Performance Summary *.html File
enlarge 95KB, 350x1024 31 H+U 4-Bay Loop RLH4 - No Refl Side View [1 large square = 5 inches]

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Enjoy reading your posts. Hard to tell how I would duplicate the loop for an existing 4-bay panel with a reflector.
- Pete Higgins, Sat, 21 Mar 2015 10:26PM