Polar Plot of the 2 X 2ele beams.


antenna polar plot

The beams are space about 4 ft apart.

Measurements made seem to indicate the computed results are quite good.

-3dB points

Half-power (-3dB) points for the 2 over 2-element beams

ANALYSIS of 2EL144.ANT on 04-02-00 at 15:18

2 X 2-ele beams for 2 Metre mobile
Free space symmetric
144.300 MHz
4 6061-T6 wires, millimetres
de = driven element diam. 13

940

sp1 = spacing between elements

325

re = reflector diam. 6.3

1016

u = vertical spacing between antennas

1180

Wire Losses

0.01 dB

Efficiency

99.7%

Forward Gain

8.02 dBd

F/B

16.90 dB

Azimuth Beamwidth

70°

Elevation Beamwidth

49°


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