• Public Gallery  • Help
		• Join Now!  • Log In  • Feature Tour

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
Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Hi-VHF Goalkeeper, a Quasi-Omni [accidental] variation of the Quad-Trapezoid+Spurs was analyzed using 4nec2, assuming QICT (Quarter-Inch Copper Tubing) for the Elements. Hi-VHF Raw Gain = 2.1 to 2.9 dBi  (Forward & Rear) and SWR (300-ohms) under 1.8 (Excellent). Beamwidth = 100-110 degrees.  [For QICT, could substitute AWG10 with higher SWR.] Provides Bi-Directional Pattern firmly aligned along the X-Axis with wide Beamwidth and NULLs to the sides.  Although Horizontally Polarized, it also provides both Right-Hand and Left-Hand Circular Polarization, but with only 1 dB LHCP suppression. Date(s): 22 Jul 2014. Album by holl_ands. 1 - 12 of 12 Total. 5533 Visits.
enlarge 57KB, 749x1024 1 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs 3D View enlarge 207KB, 826x1024 2 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs [1 large square = 12.5 inches] Height = 8+ feet x Width = 4.8 feet enlarge 27KB, 791x1024 3 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs 4nec2 File enlarge 152KB, 1024x690 4 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Hi-VHF Raw Gain = 2.1 to 2.9 dBi enlarge 190KB, 1024x690 5 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Hi-VHF SWR (300-ohms) Under 1.8 enlarge 221KB, 1024x690 6 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Hi-VHF Impedance enlarge 324KB, 1024x1024 7 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Azimuthal Pattern at 174 MHz enlarge 325KB, 1024x1024 8 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Azimuthal Pattern at 198 MHz enlarge 330KB, 1024x1024 9 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Azimuthal Pattern at 216 MHz enlarge 336KB, 1024x1024 10 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Circular Polarization at 174 MHz enlarge 339KB, 1024x1024 11 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Circular Polarization at 198 MHz enlarge 344KB, 1024x1024 12 Hi-VHF Goalkeeper Quad-Trapezoid+Spurs Circular Polarization at 216 MHz
Select All.
Sign the Guestbook. There are no entries.