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holl_ands | Home > Not For TV - Too Narrowband > Browse:UHF Loop (Parallel-to-Ground) NOT for TVUHF Fractal Pisan-CrossHiVHF+UHF Circular Pancake Loop FakeOmni2-Meter Cubical Quad-1: Howzit for TV?2-Meter Cubical Quad-2: Howzit for TV?V- & H-Polarized X396 FenceYet Another UTube DefectBruce ArraySterba CurtainSix Shooter
Yet Another UTube Defect Yet another UTube Defect analyzed using 4nec2. Raw Gain peak is very Narrowband and SWR is even more Narrowband and doesn't align with the Gain peak. Way too small to be a variant of either the (similiar???) Bruce Array or Sterba Curtain, which have half-wavelength and sometimes also quarter-wavelength radiators. Date(s): 26 July 2009. Album by holl_ands. 1 - 13 of 13 Total. 8604 Visits.
enlarge 0KB, 1024x831 1 Yet Another UTube Defect - 3D View enlarge 0KB, 1024x732 2 Yet Another UTube Defect - Raw Gain Chart enlarge 0KB, 1024x732 3 Yet Another UTube Defect - SWR Chart (300-ohm) enlarge 0KB, 1024x819 4 Yet Another UTube Defect Raw Gain towards 90-deg (Used "1D Gain" FP statement) enlarge 0KB, 1024x819 5 Yet Another UTube Defect - SWR (300-ohm) Note non-symmetric antenna pattern. enlarge 0KB, 1024x819 6 Yet Another UTube Defect - Impedance enlarge 0KB, 1024x831 7 UTube Defect Unfolded TL - 3D View Unfolded Transmission Line (TL) to illustrate antenna structure. enlarge 0KB, 1024x819 8 UTube Defect Unfolded TL - Raw Gain Nearly identical to Folded TL version above. enlarge 0KB, 1024x819 9 UTube Defect Unfolded TL - SWR(75-ohm) Very Narrow range of acceptable SWR. enlarge 0KB, 1024x819 10 UTube Defect Unfolded TL - SWR(300-ohm) Unfolded TL does not provide acceptable SWR. enlarge 0KB, 1024x819 11 UTube Defect Unfolded TL - Impedance enlarge 26KB, 791x1024 12 UTube Defect Unfolded Transmission Line Example 4nec2 File enlarge 26KB, 791x1024 13 Yet Another UTube Defect Example 4nec2 File
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