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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 Whip Outside FM Double-Hoop plus Vertical Whip Outside analyzed using 4nec2.  Similar to Dipol A0221 Antenna: http://www.dipolnet.com/estore-antennas-fm,4346.htm This antenna responds to Horizontal and Vertical Polarization, but Raw Gain is not very consistent on all angles. Vertical Whip has a Gain hole on lower freqs for Vertically Polarized signals. Total Gain (Vert. + Horiz.) remained between -3.2 and +1.9 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 5.1-7.1. Date(s): 17 Dec 2011. Album by holl_ands. 1 - 15 of 15 Total. 4397 Visits.
enlarge 97KB, 957x1024 1 FM Double-Hoop + Vertical Whip 3D View enlarge 232KB, 850x1024 2 FM Double-Hoop + Vertical Whip Front View [1 big box = 2.5-inches] enlarge 265KB, 1024x992 3 FM Double-Hoop + Vertical Whip Top View [1 big box = 2.5-inches] enlarge 168KB, 1152x584 4 FM Double-Hoop + Vertical Whip FM Total Raw Gain FORWARD enlarge 143KB, 1152x584 5 Double-Hoop + Vertical Dipole In Center FM Total Raw Gain to SIDE (0-deg) enlarge 165KB, 1152x584 6 FM Double-Hoop + Vertical Whip FM SWR (300-ohms) Under 7.1 enlarge 191KB, 1152x584 7 FM Double-Hoop + Vertical Whip FM SWR (75-ohms) Excessive on Mid-High Freqs enlarge 150KB, 1152x584 8 FM Double-Hoop + Vertical Whip FM Impedance enlarge 261KB, 955x1024 9 FM Double-Hoop + Vertical Whip Side View [1 big box = 2.5-inches] enlarge 314KB, 1024x1024 10 FM Double-Hoop + Vertical Whip Azimuthal Pattern at 87 MHz enlarge 306KB, 1024x1024 11 FM Double-Hoop + Vertical Whip Azimuthal Pattern at 93 MHz enlarge 309KB, 1024x1024 12 FM Double-Hoop + Vertical Whip Azimuthal Pattern at 98 MHz enlarge 322KB, 1024x1024 13 FM Double-Hoop + Vertical Whip Azimuthal Pattern at 103 MHz enlarge 337KB, 1024x1024 14 FM Double-Hoop + Vertical Whip Azimuthal Pattern at 108 MHz enlarge 48KB, 791x1024 15 FM Double-Hoop + Vertical Whip 4nec 2 File
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