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Horizon Peak Radio Signal Over-Shoot

Distance To The Horizon - Distance to 1st. and 2nd. Nulls

0

Bays

*Input Antenna height:

HAAT

Input (M)eters or (F)eet:

M F

Input Number of bays:

1 2 3 4 5 6 7 8 9 10 11 12 14 16

Input Spacing between bays:

1.0 λ 0.5  λ

Input Station frequency:

MHz.

90% Elevation Tilt

**Elevation Gain:

x

Tower Height in Feet (HAAT)

***Vertical Angle of 1st. Null:

º

Miles to 1st. Null

***Vertical Angle of 2nd. Null:

º

Miles to 2nd. Null

Distance to Radio Horizon is:

Miles

Kilometers

Distance to Optical Horizon is:

Miles

Kilometers

Minimum Beamwidth is:

º

Maximum Beamwidth is:

º

At first null

Center of top bay at:

ft.approx.

Meters

Center of bottom bay at:

ft.approx.

Meters

Center top to Center bottom bay:

ft.approx.

Meters

Overall Space Required on tower:

ft.approx.Allow clearance above and below array

Bay Spacing:

Lynx

1.0 λ

0.926 λ

Check with consultant to see if beam tilt is needed

0.80 λ

0.75 λ

*Antenna Height is measured to the center of the antenna

†Tilt angles suggested for use with 5 or more bays

0.50 λ

** Estimated based on number of bays and spacing

Based on 4/3 curvature smooth Earth.

***Estimated based on look up chart; yours may be different

Not responsible for errors of any type.

****Estimated, check with your consultant for actual value

Let your consultant guide your choice of beam tilt and/or null fill

Input height, bays, frequency, M or F and bay spacing

Meters

Meters or Feet choice is a mouse pull down

Bay Spacing choice is a mouse pull down

Calculations / answers are in Blue & White

Drawings copyright BobGroome April 12, 2013