2-meter (145 MHz) Lindenblad Omni Array analyzed using 4nec2. More info found here: http://www.amsat.org/amsat/articles/w6shp/lindy.html http://www.amphenol-antennas.com/getattachment/e8a306bf-a2ce-412b-a48f-7d55ad509e55/7860xxx.aspx
Based on lindnbld.ez (EZNEC) File downloaded from http://nec-archives.pa3kj.com/EZNEC_FILES, which was Imported into 4nec2 and then converted into a Variable SYmbol driven File to facilitate further analysis, as shown below. NONE of the Dimensions have been changed, including Diagonals being at 46.91-deg (vice 45-deg) Angles.
In this version, separate SOURCEs are used on each Element. In a REAL Antenna, a 4-Way Feedline would be used, matched to a standard Impedance, and it would likely degrade performance (T.B.D.).
For signals with RHCP (Right Hand Circular Polarization), the Azimuthal Pattern is very OMNI-DIRECTIONAL. However, for signals with mostly Horizontal Polarization, there is significantly lower Gain.
When signals are Reflected, they usually undergo a change from RHCP to LHCP. This version of the Lindenblad Omni Array provides a moderate amount of suppression of these Multipath Reflections.
Date(s): 7 Oct 2015. Album by holl_ands. 1 - 19 of 19 Total. 2184 Visits.
enlarge 72KB, 994x1024 1 2m Lindenblad Omni Array 3D View
enlarge 237KB, 1024x892 2 2m Lindenblad Omni Array Front View [1 large square = 5 inches]
enlarge 226KB, 1024x898 3 2m Lindenblad Omni Array Top View [1 large square = 5 inches]
enlarge 181KB, 1024x722 4 2m Lindenblad Omni Array Raw Gain = 1.38 to 1.2 dBi
enlarge 198KB, 1024x722 5 2m Lindenblad Omni Array Best SWR for EACH Element is 200-ohms
enlarge 236KB, 1024x722 6 2m Lindenblad Omni Array Impedance for Each Element
enlarge 332KB, 1024x1024 7 2m Lindenblad Omni Array RHCP Azimuthal Pattern at 130 MHz
enlarge 324KB, 1024x1024 8 2m Lindenblad Omni Array RHCP Azimuthal Pattern at 145 MHz
enlarge 319KB, 1024x1024 9 2m Lindenblad Omni Array RHCP Azimuthal Pattern at 160 MHz
enlarge 325KB, 1024x1024 10 2m Lindenblad Omni Array RHCP Elevation Pattern at 130 MHz
enlarge 320KB, 1024x1024 11 2m Lindenblad Omni Array RHCP Elevation Pattern at 145 MHz
enlarge 317KB, 1024x1024 12 2m Lindenblad Omni Array RHCP Elevation Pattern at 160 MHz
enlarge 334KB, 1024x1024 13 2m Lindenblad Omni Array Azimuthal Pattern at 130 MHz
enlarge 329KB, 1024x1024 14 2m Lindenblad Omni Array Azimuthal Pattern at 145 MHz
enlarge 329KB, 1024x1024 15 2m Lindenblad Omni Array Azimuthal Pattern at 160 MHz
enlarge 323KB, 1024x1024 16 2m Lindenblad Omni Array Elevation Pattern at 130 MHz
enlarge 321KB, 1024x1024 17 2m Lindenblad Omni Array Elevation Pattern at 145 MHz
enlarge 320KB, 1024x1024 18 2m Lindenblad Omni Array Elevation Pattern at 160 MHz
enlarge 26KB, 791x1024 19 2m Lindenblad Omni Array 4nec2 File includes Summary of Dimensions
