HiVHF+UHF Circular Pancake Loop FakeOmni

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HiVHF+UHF Circular Pancake Loop FakeOmni

Hi-VHF+UHF Circular Pancake Loop (Fake Omni) analyzed using 4nec2.

Loop Center-Center Diameter assumed to be about 27-in, based on info found at fol. Halo VuTV website:
http://www.etsy.com/listing/150171803/halo-vutv-omnidirectional-uhf-vhf-long

Analysis revealed that the Hi-VHF Azimuthal Response is very irregular...NOT Omni....and UHF is even worse.

Three versions were analyzed, based on whether the portion opposite from the Feedpoint is connected or there is a Gap cut into the Loop:

a) Loop NOT CUT opposite from Feedpoint.

b) Loop with 5.25-in Gap CUT opposite from Feedpoint.

c) Loop with 1.0-in Gap CUT opposite from Feedpoint.

Date(s): 10 Aug 2013. Album by holl_ands. 1 - 63 of 63 Total. 3365 Visits.

enlarge 299KB, 1015x1024 1 Circular 27-in Pancake Loop FakeOmni Top View [1 large square = 2.5 inches]	enlarge 50KB, 1152x158 2 Circular 27-in Pancake Loop FakeOmni Front View [1 large square = 2.5 inches]	enlarge 50KB, 1152x164 3 Circular 27-in Pancake Loop FakeOmni Side View [1 large square = 2.5 inches]
enlarge 180KB, 1152x685 4 Circular 27-in Pancake Loop FakeOmni Hi-VHF Raw Gain - FORWARD [F/B & F/R Ratios not calculated]	enlarge 214KB, 1152x685 5 Circular 27-in Pancake Loop FakeOmni Hi-VHF SWR (300-ohms) Under 4.9	enlarge 246KB, 1152x685 6 Circular 27-in Pancake Loop FakeOmni Hi-VHF Impedance
enlarge 189KB, 1152x685 7 Circular 27-in Pancake Loop FakeOmni Hi-VHF Raw Gain - TOWARD REAR F/B & F/R Ratios are calculated.	enlarge 215KB, 1152x685 8 Circular 27-in Pancake Loop FakeOmni Hi-VHF SWR (600-ohms) Under 2.6	enlarge 27KB, 791x1024 9 Circular 27-in Pancake Loop FakeOmni 4nec2 File
enlarge 311KB, 1024x1024 10 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 174 MHz	enlarge 314KB, 1024x1024 11 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 198 MHz	enlarge 330KB, 1024x1024 12 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 216 MHz
enlarge 193KB, 1152x685 13 Circular 27-in Pancake Loop FakeOmni UHF Raw Gain - FORWARD	enlarge 209KB, 1152x685 14 Circular 27-in Pancake Loop FakeOmni UHF SWR (300-ohms) Under 2.8	enlarge 253KB, 1152x685 15 Circular 27-in Pancake Loop FakeOmni UHF Impedance
enlarge 310KB, 1024x1024 16 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 470 MHz	enlarge 312KB, 1024x1024 17 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 530 MHz	enlarge 315KB, 1024x1024 18 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 590 MHz
enlarge 316KB, 1024x1024 19 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 650 MHz	enlarge 320KB, 1024x1024 20 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 698 MHz	enlarge 322KB, 1024x1024 21 Circular 27-in Pancake Loop FakeOmni Azimuthal Pattern at 806 MHz
enlarge 293KB, 1011x1024 22 Circular 27-in Pancake Loop FakeOmni Top View - 5.25-in CUT [1 large square = 2.5 inches]	enlarge 50KB, 1152x155 23 Circular 27-in Pancake Loop FakeOmni Front View - 5.25-in CUT [1 large square = 2.5 inches]	enlarge 54KB, 1152x162 24 Circular 27-in Pancake Loop FakeOmni Side View - 5.25-in CUT [1 large square = 2.5 inches]
enlarge 165KB, 1152x685 25 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Hi-VHF Raw Gain FORWARD	enlarge 165KB, 1152x685 26 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Hi-VHF Raw Gain - TO SIDES	enlarge 203KB, 1152x685 27 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Hi-VHF SWR (300-ohms) is EXCESSIVE
enlarge 323KB, 1024x1024 28 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 174 MHz	enlarge 314KB, 1024x1024 29 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 198 MHz	enlarge 312KB, 1024x1024 30 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 216 MHz
enlarge 194KB, 1152x685 31 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint UHF Raw Gain FORWARD F/B & F/R Ratios are very irregular	enlarge 208KB, 1152x685 32 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint UHF SWR (300-ohms) Under 3.0	enlarge 243KB, 1152x685 33 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint UHF Impedance
enlarge 319KB, 1024x1024 34 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 470 MHz	enlarge 311KB, 1024x1024 35 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 530 MHz	enlarge 306KB, 1024x1024 36 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 590 MHz
enlarge 314KB, 1024x1024 37 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 650 MHz	enlarge 314KB, 1024x1024 38 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 690 MHz	enlarge 312KB, 1024x1024 39 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 758 MHz
enlarge 323KB, 1024x1024 40 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Azimuthal Pattern at 806 MHz	enlarge 238KB, 1152x685 41 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint Hi-VHF Impedance	enlarge 27KB, 791x1024 42 Circular 27-in Pancake Loop FakeOmni 5.25-in Gap CUT opposite Feedpoint 4nec2 File
enlarge 296KB, 1017x1024 43 Circular 27-in Pancake Loop FakeOmni Top View - 1.0-in CUT [1 large square = 2.5 inches]	enlarge 51KB, 1152x163 44 Circular 27-in Pancake Loop FakeOmni Front View - 1.0-in CUT [1 large square = 2.5 inches]	enlarge 51KB, 1152x161 45 Circular 27-in Pancake Loop FakeOmni Side View - 1.0-in CUT [1 large square = 2.5 inches]
enlarge 171KB, 1152x685 46 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Hi-VHF Raw Gain FORWARD	enlarge 182KB, 1152x685 47 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Hi-VHF Raw Gain TO SIDES	enlarge 215KB, 1152x685 48 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Hi-VHF SWR (300-ohms) is EXCESSIVE
enlarge 325KB, 1024x1024 49 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 174 MHz	enlarge 317KB, 1024x1024 50 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 198 MHz	enlarge 314KB, 1024x1024 51 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 216 MHz
enlarge 186KB, 1152x685 52 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint UHF Raw Gain FORWARD F/B & F/R Ratios are very irregular	enlarge 218KB, 1152x685 53 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint UHF SWR (300-ohms) Under 2.5	enlarge 248KB, 1152x685 54 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint UHF Impedance
enlarge 303KB, 1024x1024 55 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 470 MHz	enlarge 305KB, 1024x1024 56 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 530 MHz	enlarge 308KB, 1024x1024 57 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 590 MHz
enlarge 308KB, 1024x1024 58 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 650 MHz	enlarge 309KB, 1024x1024 59 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 698 MHz	enlarge 312KB, 1024x1024 60 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 758 MHz
enlarge 311KB, 1024x1024 61 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Azimuthal Pattern at 806 MHz	enlarge 240KB, 1152x685 62 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint Hi-VHF Impedance	enlarge 27KB, 791x1024 63 Circular 27-in Pancake Loop FakeOmni 1.0-in Gap CUT opposite Feedpoint 4nec2 File

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