70cm+FRS+GMRS 20-El FD-Yagi

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70cm+FRS+GMRS 20-El FD-Yagi

20- Element Folded-Dipole Yagi Antenna to cover entire 70-cm (440 MHz) plus FRS and GMRS Frequency Bands (420 thru 468 MHz) analyzed
using 4nec2 after determining best Dimensions using nikiml's Python Optimization Scripts. Since intended for Transmit Operations, Target SWR
is to be Under 1.6, allowing for OTHER SWR degradations when using a Transmitter that might shut down when SWR reaches 2.0.

TWO ALTERNATIVE DESIGNS ARE PRESENTED:

a) Optimized ONLY for Gain and SWR:

420-468 MHz Raw Gain = 15.7 to 17.0 dBi and SWR (200-ohms) Under 1.3.

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b) Optimized for Gain, SWR, Front/Back and Front/Rear Ratios:

T.B.D.

Date(s): 30 Aug 2016. Album by holl_ands. 1 - 18 of 18 Total. 2158 Visits.

enlarge 60KB, 1024x1013 1 70cm+FRS+GMRS 20-El FD-Yagi 3D View	enlarge 108KB, 1152x334 2 70cm+FRS+GMRS 20-El FD-Yagi Front View [1 large square = 1.25 inches]	enlarge 120KB, 1152x367 3 70cm+FRS+GMRS 20-El FD-Yagi Top View [1 large square = 12.5 inches]
enlarge 203KB, 1152x711 4 70cm+FRS+GMRS 20-El FD-Yagi 420-468 MHz Raw Gain = 15.7 to 17.0 dBi	enlarge 223KB, 1152x711 5 70cm+FRS+GMRS 20-El FD-Yagi 420-468 MHz SWR (200-ohms) Under 1.3	enlarge 243KB, 1152x703 6 70cm+FRS+GMRS 20-El FD-Yagi 420-468 MHz Impedance
enlarge 212KB, 1152x711 7 70cm+FRS+GMRS 20-El FD-Yagi 400-500 MHz Raw Gain	enlarge 241KB, 1152x711 8 70cm+FRS+GMRS 20-El FD-Yagi 400-500 MHz SWR (200-ohms)	enlarge 280KB, 1152x711 9 70cm+FRS+GMRS 20-El FD-Yagi 400-500 MHz Impedance
enlarge 311KB, 1024x1024 10 70cm+FRS+GMRS 20-El FD-Yagi Azimuthal Pattern at 420 MHz Beamwidth = 32 degrees	enlarge 311KB, 1024x1024 11 70cm+FRS+GMRS 20-El FD-Yagi Azimuthal Pattern at 444 MHz Beamwidth = 28 degrees	enlarge 311KB, 1024x1024 12 70cm+FRS+GMRS 20-El FD-Yagi Azimuthal Pattern at 468 MHz Beamwidth = 24 degrees
enlarge 315KB, 1024x1024 13 70cm+FRS+GMRS 20-El FD-Yagi Elevation Pattern at 420 MHz Elev. Beamwidth = 16 degrees	enlarge 318KB, 1024x1024 14 70cm+FRS+GMRS 20-El FD-Yagi Elevation Pattern at 444 MHz Elev. Beamwidth = 14 degrees	enlarge 321KB, 1024x1024 15 70cm+FRS+GMRS 20-El FD-Yagi Elevation Pattern at 468 MHz Elev. Beamwidth = 14 degrees
enlarge 31KB, 791x1024 16 70cm+FRS+GMRS 20-El FD-Yagi 4nec2 File includes Summary of Dimensions	enlarge 28KB, 791x1024 17 70cm+FRS+GMRS 20-El FD-Yagi EVAL File Summary of Performance	enlarge 36KB, 791x1024 18 70cm+FRS+GMRS 20-El FD-Yagi EVAL *.html Performance Summary

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can you email me the final NEC file??
I would like to run the simulation on 4nec2.

roger
- roger, Wed, 12 Feb 2020 7:42AM