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holl_ands | Home > LPDA + ZigZagLPA Antennas > VHF LPDA > Browse:CM1221 Dual LPDA WedgeVHF CM1111 Quantum 23-El LPDAVHF R-S VU190XR LPDA (No UHF)
CM1221 Dual LPDA Wedge Channel Master CM-1221 Dual LPDA Wedge Analyzed using 4nec2, based on a post by 300ohms. For some Unknown Reason, 4nec2 did NOT generate meaningful results below Ch5, so refer to nikiml's EVAL Summary of Performance below.  In Lo-VHF Band (Ch2-6) Raw Gain is 7-8 dbi with Excessive SWR on Ch2. Raw Gain is 5-6 dBi in FM Band. In Hi-VHF Band Raw Gain is 10-12 dBi, except drops off several dB across Ch7 with Poor SWR. Date(s): 24 Dec 2015. Album by holl_ands. 1 - 18 of 18 Total. 1342 Visits.
enlarge 70KB, 1024x674 1 CM-1221 Dual LPDA Wedge 3D View enlarge 177KB, 1152x574 2 CM-1221 Dual LPDA Wedge Front View [1 large square = 12.5 inches] enlarge 266KB, 965x1024 3 CM-1221 Dual LPDA Wedge Top View [1 large square = 12.5 inches] enlarge 171KB, 1024x647 4 CM-1221 Dual LPDA Wedge Hi-VHF Raw Gain (dbi) Hi-VHF F/B & F/R Ratios (dB) enlarge 183KB, 1024x647 5 CM-1221 Dual LPDA Wedge Hi-VHF SWR (300-ohms) enlarge 214KB, 1024x647 6 CM-1221 Dual LPDA Wedge Hi-VHF Impedance enlarge 317KB, 1024x1024 7 CM-1221 Dual LPDA Wedge Azimuthal Pattern at 174 MHz enlarge 315KB, 1024x1024 8 CM-1221 Dual LPDA Wedge Azimuthal Pattern at 198 MHz enlarge 317KB, 1024x1024 9 CM-1221 Dual LPDA Wedge Azimuthal Pattern at 216 MHz enlarge 166KB, 1024x647 10 CM-1221 Dual LPDA Wedge Ch6-FM Band Raw Gain (dbi) Ch6-FM Band F/B & F/R Ratios (dB) enlarge 193KB, 1024x647 11 CM-1221 Dual LPDA Wedge Ch6-FM Band SWR (300-ohms) enlarge 218KB, 1024x647 12 CM-1221 Dual LPDA Wedge Ch6-FM Band Impedance enlarge 319KB, 1024x1024 13 CM-1221 Dual LPDA Wedge Azimuthal Pattern at 84 MHz (Ch6) enlarge 320KB, 1024x1024 14 Azimuthal Pattern at 98 MHz (Mid-FM Band) enlarge 321KB, 1024x1024 15 Azimuthal Pattern at 108 MHz (Top-FM Band) enlarge 28KB, 791x1024 16 CM-1221 Dual LPDA Wedge 4nec2 File enlarge 27KB, 791x1024 17 CM-1221 Dual LPDA Wedge EVAL Summary of Performance enlarge 34KB, 791x1024 18 CM-1221 Dual LPDA Wedge EVAL *.html Performance Summary File
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