SPECIFICS 21 MHz

Typical polar far field radiation patterns.

The patterns below show typical radiation solids for installation at different height from the ground and for distances greater than Fraunhofer distance.

 

@5m (16.40 ft) from the ground

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@10 m (32.80 ft) from the ground

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@15m (49.21 ft) from the ground

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Null
Null

 

Gain versus height from the ground, calculated for installations from 3 to 30 meters.

deltaloop_gain_21mhz

 

Elevation angle versus height from the ground, calculated for installations from 3 to 30 meters. deltaloop_takeoff_21mhz

 

Measurement of Standing Wave Ratio (S.W.R.)

swr_15m