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holl_ands | Home > Omni & Quasi-Omni Directional Antennas > Browse:FM Flat-Swept SBGH H-POL OMNI-PLUSFM TRIAD 4xRectangular-Loops H-OMNI-PLUSFM Goalkeeper Quad-Trap+Spurs Quasi-OMNIFM TRIAD Array of Dipoles H-OMNIFM Double-Hoop H-POL OMNIFM Double-Hoop + Vertical-Dipole OutsideFM Double-Hoop + Vertical-FD-OutsideFM Double-Hoop + Vert. Dipole In CenterFM Double-Hoop + Vertical-FD-In-CenterFM Double-Hoop + Vertical Whip OutsideFM Vertical Folded Dipole VPOL TRUE-OMNIFM Vertical Stick Dipole V-POL TRUE-OMNIFM + VHF Discone V-POL TRUE-OMNIFM Monopole Whip over Groundplane OMNIFM Turnstile QuasiOMNI Antennacraft FMSSFM Turnstile Quasi-Omni - AlternateFM Turnstile - A-C FMSS RotatedFM ESS Curves - Fracarro & DipolFM ZigZag - Triax FM ZigmaFM Right Circular Folded Dipole PairFM Cycloid Dipole - Circular Polarized490 MHz Flat-Swept SBGH H-POL OMNI-PLUS490 MHz Flat-Swept SBGH OMNI + TOP-HAT490 MHz 3-Dipole TRIAD Array H-POL OMNI490 MHz Crossed-Dipoles + One TL - OMNI490 MHz Crossed-Dipoles, 2 Unequal TLs490 MHz 7-El Yagi TRIAD H-POL OMNI-PLUS490 MHz 4El Yagi Triad H-POL True-OMNI490 MHz Collinear Helical HPOL OMNI-PLUS490 MHz Double Diamond H-POL Quasi-OMNIUHF Vertical Folded Dipole V-POL OMNIUHF SBGH H-POL OMNI-PLUS by nikimlUHF Hoverman Type 1 H-POL Quasi-OmniUHF M4 (10x9.5) Twisted 4-Bay Quasi-OMNIUHF 2xM4 Twisted 8-Bay - Quasi-OMNIHi-VHF Goalkeeper Quad-Trapezoid+SpursHi-VHF Monopole Whip V-POL TRUE-OMNIHi-VHF Vertical Folded Dipole OMNICh2-69 Crossed Loops 90-deg Phase ShiftCh2-69 + FM Crossed Loops - UVOX-22m "Classic" 3QWL+QWL J-Pole
FM Double-Hoop + Vertical-FD-Outside 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. Date(s): 23 Dec 2011. Album by holl_ands. 1 - 15 of 15 Total. 6129 Visits.
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
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