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holl_ands | Home > Circular Polarized incl. Rabbit-Ears > Crossed Dipoles > Browse:Hi-VHF Crossed FD's - 2TL=QWL+HWLHi-VHF Crossed Folded Dipoles - TL=QWLHi-VHF Folded-Dipole-Pair - Cir. Polar.Hi-VHF Dipole-Pair - K6STI's Cir. Pol.
Hi-VHF Folded-Dipole-Pair - Cir. Polar. Hi-VHF Crossed Folded-Dipole-Pair with Right Hand Circular Polarization analyzed using 4nec2. Derived from K6STI's VHF Dipole-Pair, found as cirdip3.nec in 4nec2's c:\nec2\models\VHFsimple sub-directory, as well as here: http://heplx3.phsx.ku.edu/~dzb/antcal/nec-files/circdip3.nec. Rescaled so that Left Hand Circular (Cross) Polarization is MINIMUM at 90-deg azimuth on 198 MHz. Provides very good Right Hand Circular Polarization performance, with Left Hand (Cross) Polarization difference between 7 dB (at band edges) and 20+ dB at 198 MHz.  Gain is between 1.5 dBic (band edges) and 2.1 dBic at 198 MHz. SWR (300-ohms) is excellent, under 2.0. Note that Right Hand Circular Polarization is strongest FORWARD, while Left Hand is strongest to REVERSE, so VERY CAREFULLY check antenna connections and alignment. Poor Cross Polarization Loss on higher Hi-VHF channels and lack of LHCP suppression (Multipath) from REAR. Date(s): 16 Jan 2012. Album by holl_ands. 1 - 23 of 23 Total. 2642 Visits.
enlarge 50KB, 1024x830 1 Hi-VHF Folded-Dipole-Pair - RtCirPolar 3D View enlarge 234KB, 1024x839 2 Hi-VHF Folded-Dipole-Pair - RtCirPolar Front View [1 big box = 2.5-inches] enlarge 73KB, 262x1024 3 Hi-VHF Folded-Dipole-Pair - RtCirPolar Top View [1 big box = 2.5-inches] enlarge 155KB, 1024x686 4 Hi-VHF Folded-Dipole-Pair - RtCirPolar Hi-VHF TOTAL Raw Gain = 2.3 to 2.0 dBi enlarge 186KB, 1024x686 5 Hi-VHF Folded-Dipole-Pair - RtCirPolar Hi-VHF SWR (300-ohms) Under 2.0 enlarge 149KB, 1024x686 6 Hi-VHF Folded-Dipole-Pair - RtCirPolar Hi-VHF Impedance enlarge 334KB, 1024x1024 7 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 174 MHz enlarge 339KB, 1024x1024 8 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 185 MHz enlarge 326KB, 1024x1024 9 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 198 MHz enlarge 322KB, 1024x1024 10 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 200 MHz Horizontal = Vertical Gain at 90-deg. enlarge 332KB, 1024x1024 11 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 207 MHz enlarge 334KB, 1024x1024 12 Hi-VHF Folded-Dipole-Pair - RtCirPolar Total, Horiz. & Vert. Azimuthal Patterns at 216 MHz enlarge 331KB, 1024x1024 13 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 174 MHz Right Hand Circular stronger FORWARD. Left Hand Circular stronger to REVERSE. enlarge 331KB, 1024x1024 14 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 180  MHz enlarge 329KB, 1024x1024 15 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 186 MHz enlarge 328KB, 1024x1024 16 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 192 MHz enlarge 329KB, 1024x1024 17 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 198 MHz Left Hand Circular (Cross) Polarization at MINIMUM. enlarge 336KB, 1024x1024 18 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 204 MHz enlarge 339KB, 1024x1024 19 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 210 MHz enlarge 340KB, 1024x1024 20 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns at 216 MHz enlarge 385KB, 1024x1024 21 Hi-VHF Folded-Dipole-Pair - RtCirPolar Circular Polarization Patterns - Ani-Gif Left Hand Circular (Cross) Polarization MINIMUM on 198 MHz. enlarge 28KB, 791x1024 22 Hi-VHF Folded-Dipole-Pair - RtCirPolar 4nec2 File enlarge 81KB, 308x1024 23 Hi-VHF Folded-Dipole-Pair - RtCirPolar Side View [1 big box = 2.5-inches]
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