FM Double-Hoop Omni antenna analyzed using 4nec2. Similar to Antennas Direct FM-360-HD, Antiference FM1080, Dipol A0210/A0220, Fracarro "FM Omni", Televes 1201, Triax "FM Omni" & Stellar Labs 30-2435.
This antenna responds to Horizontal (ONLY) Polarization.
Horizontally Polarized Raw Gain is not quite Omni-Directional, ranging from -2.1 to +1.3 dBi, depending on angle & frequency. SWR (300-ohms) is 6.2-11.5
17 Dec 201115 items7378 visitsAlbum by holl_ands
enlarge 97KB, 1024x679 1 FM Double-Hoop 3D View
enlarge 115KB, 1152x391 2 FM Double-Hoop Front View [1 big box = 2.5-inches]
enlarge 255KB, 1024x972 3 FM Double-Hoop Top View [1 big box = 2.5-inches]
enlarge 146KB, 1152x584 4 FM Double-Hoop FM Total Raw Gain FORWARD
enlarge 135KB, 1152x584 5 FM Double-Hoop FM Total Raw Gain to SIDE (0-deg)
enlarge 162KB, 1152x584 6 FM Double-Hoop FM SWR (300-ohms) is 6.2-11.5
enlarge 177KB, 1152x584 7 FM Double-Hoop FM SWR (75-ohms) is Excessive on Mid-High Freqs
enlarge 146KB, 1152x584 8 FM Double-Hoop FM Impedance
enlarge 115KB, 1152x365 9 FM Double-Hoop Side View [1 big box = 2.5-inches]
enlarge 310KB, 1024x1024 10 FM Double-Hoop Azimuthal Pattern at 87 MHz
enlarge 301KB, 1024x1024 11 FM Double-Hoop FM Azimuthal Pattern at 91 MHz
enlarge 302KB, 1024x1024 12 FM Double-Hoop FM Azimuthal Pattern at 98 MHz
enlarge 305KB, 1024x1024 13 FM Double-Hoop FM Azimuthal Pattern at 103 MHz
enlarge 307KB, 1024x1024 14 FM Double-Hoop FM Azimuthal Pattern at 108 MHz
enlarge 48KB, 791x1024 15 FM Double-Hoop 4nec2 File
