UHF Vertical Folded Dipole analyzed using 4nec2. It provides a TRUE OMNI-Directional Azimuthal Pattern, but ONLY for Vertical and Circular/Elliptical Polarized signals.
Fol. analysis assumed fol. Dimensions: L2=9.25 ' Folded Dipole Overall Element Length FW=1.0 ' Distance between Folded Dipole Elements GAP=0.5 ' Balun FeedPoint Gap Size RACT=0.125 ' Radius (inches) for Driven Element is 1/4-in O.D. Copper Tubing
Dimensions AWG10 and it's degradation to SWR can be found in the analysis for UHF Folded Dipole for Horizontal Polarized signals: http://imageevent.com/holl_ands/loops/folded Note that it's the SAME Antenna, except oriented Vertical or Horizontally.
29 Oct 201512 items3843 visitsAlbum by holl_ands
enlarge 30KB, 605x1024 1 UHF Vertical Folded Dipole OMNI 3D View
enlarge 125KB, 515x1024 2 UHF Vertical Folded Dipole OMNI Side View [1 large Square = 1.25 inches]
enlarge 26KB, 791x1024 3 UHF Vertical Folded Dipole OMNI 4nec2 File Includes Summary of Dimensions
enlarge 171KB, 1024x644 4 UHF Vertical Folded Dipole OMNI UHF Gain = 2.4 to 3.2 dBi towards 280-deg
enlarge 190KB, 1024x644 5 UHF Vertical Folded Dipole OMNI UHF SWR (300-ohms) Under 2.6
