FM Double-Hoop plus Vertical-Folded-Dipole-Outside analyzed using 4nec2.
This antenna responds to Horizontal and Vertical Polarization, with a Horizontal Gain of -3.9 to +1.2 dBi. Vertical Whip max was -1.4 dBi with a -22 dBi Gain hole on lower freqs for Vertically Polarized signals.
Total Gain (Vert. + Horiz.) remained between -2.3 and -1.4 dBi across all angles and frequencies. However, users may be unhappy with performance if a station is only transmitting Vertical Polarity. SWR (300-ohms) was 6.4-6.8.
23 Dec 201115 items6315 visitsAlbum by holl_ands
enlarge 68KB, 689x1024 1 FM Double-Hoop + Vertical-Folded-Dipole-Outside 3D View
enlarge 236KB, 760x1024 2
enlarge 249KB, 1024x899 3
enlarge 59KB, 1024x715 4 FM Double-Hoop + Vertical-Folded-Dipole-Outside 3D View DETAIL
enlarge 171KB, 1152x584 5 FM Double-Hoop + Vertical-Folded-Dipole-Outside FM Raw Gain FORWARD (90-deg)
enlarge 145KB, 1152x584 6 FM Double-Hoop + Vertical-Folded-Dipole-Outside FM Raw Gain to SIDE (0-deg)
enlarge 132KB, 1152x584 7 M Double-Hoop + Vertical-Folded-Dipole-Outside FM Raw Gain on DIAGONAL (45-deg)
enlarge 158KB, 1152x584 8 M Double-Hoop + Vertical-Folded-Dipole-Outside FM SWR (300-ohms) is 6.4-6.8
enlarge 150KB, 1152x584 9 M Double-Hoop + Vertical-Folded-Dipole-Outside FM Impedance
enlarge 318KB, 1024x1024 10 M Double-Hoop + Vertical-Folded-Dipole-Outside Azimuthal Pattern at 87 MHz
enlarge 312KB, 1024x1024 11 M Double-Hoop + Vertical-Folded-Dipole-Outside Azimuthal Pattern at 91 MHz
enlarge 324KB, 1024x1024 12 M Double-Hoop + Vertical-Folded-Dipole-Outside Azimuthal Pattern at 97 MHz
enlarge 337KB, 1024x1024 13 M Double-Hoop + Vertical-Folded-Dipole-Outside Azimuthal Pattern at 103 MHz
enlarge 335KB, 1024x1024 14 M Double-Hoop + Vertical-Folded-Dipole-Outside Azimuthal Pattern at 108 MHz
enlarge 48KB, 791x1024 15 M Double-Hoop + Vertical-Folded-Dipole-Outside 4nec2 File
