FM Flat-Swept SBGH (Single Bay Grey Hoverman) Horizontally-Polarized OMNI-PLUS Antenna analyzed using 4nec2 after determining BEST Dimensions using nikiml's Python Optimization Scripts. Just one of my ANTZZ (see Cartoon).
Even after imposing a Height CONSTRAINT, it is still 194.6-inches (16.2-ft) Tall, presuming 1/4-in Copper (maybe 1/2-in or larger): Min Gain = 4.5 dBi, Max Gain = 7.5 dBi, SWR (300-ohms) under 2.3.
This H-Pol. Antenna provides OMNI+PLUS Azimuthal Pattern (Greater than 0 dBd = 2.15 dBi Gain in every direction), with a MINIMUM Gain of 4.5 dBi or MORE on ALL Azimuths.
Without a Height CONSTRAINT, it was TWICE as Tall with only a few tenths of a dB Gain Improvement and Excessive SWR...hence it is not presented here.
5 Jul 201618 items2443 visitsAlbum by holl_ands
enlarge 57KB, 575x1024 1 FM Flat-Swept SBGH H-POL OMNI-PLUS 3D View
enlarge 157KB, 601x1024 2 FM Flat-Swept SBGH H-POL OMNI-PLUS Front View [1 large square = 25 inches]
enlarge 208KB, 810x1024 3 FM Flat-Swept SBGH H-POL OMNI-PLUS Front View BEFORE Swept Forward [1 large square = 25 inches]
enlarge 129KB, 507x1024 4 FM Flat-Swept SBGH H-POL OMNI-PLUS Side View [1 large square = 25 inches]
enlarge 195KB, 885x1024 5 FM Flat-Swept SBGH H-POL OMNI-PLUS Top View [1 large square = 12.5 inches]
enlarge 129KB, 1024x898 6 FM Flat-Swept SBGH H-POL OMNI-PLUS 3D Pattern
enlarge 203KB, 1152x703 7 FM Flat-Swept SBGH H-POL OMNI-PLUS FM Raw Gain Forward FM F/B & F/R Ratios
enlarge 213KB, 1152x703 8 FM Flat-Swept SBGH H-POL OMNI-PLUS FM SWR (300-ohms) Under 2.3
enlarge 244KB, 1152x703 9 FM Flat-Swept SBGH H-POL OMNI-PLUS FM Impedance
enlarge 308KB, 1024x1024 10 FM Flat-Swept SBGH H-POL OMNI-PLUS Azimuthal Pattern at 88 MHz
enlarge 308KB, 1024x1024 11 FM Flat-Swept SBGH H-POL OMNI-PLUS Azimuthal Pattern at 98 MHz
enlarge 312KB, 1024x1024 12 FM Flat-Swept SBGH H-POL OMNI-PLUS Azimuthal Pattern at 108 MHz
enlarge 304KB, 1024x1024 13 FM Flat-Swept SBGH H-POL OMNI-PLUS Elevation Pattern at 88 MHz Beamwidth = 32-degrees is TWICE the Chart Label
enlarge 304KB, 1024x1024 14 FM Flat-Swept SBGH H-POL OMNI-PLUS Elevation Pattern at 98 MHz Beamwidth = 28-degrees is TWICE the Chart Label
enlarge 311KB, 1024x1024 15 FM Flat-Swept SBGH H-POL OMNI-PLUS Elevation Pattern at 108 MHz Beamwidth = 24-degrees is TWICE the Chart Label
enlarge 28KB, 791x1024 16 FM Flat-Swept SBGH H-POL OMNI-PLUS 4nec2 File includes Summary of Dimensions
enlarge 26KB, 791x1024 17 FM Flat-Swept SBGH H-POL OMNI-PLUS EVAL Summary of Performance
