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Antenna Downtilt and Coverage Calculator

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Antenna Downtilt and Coverage Calculator | RF Link Solver
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RESULTS
DOWNTILT ANGLE
- °
INNER COVERAGE RADIUS
- ft
OUTER COVERAGE RADIUS
- ft

Input Parameters Specification

Transmitter Height (Ht) The physical elevation height of the transmission sectoral antenna radiator array measured relative to ground levels.
Receiver Height (Hr) The exact target endpoint receiver antenna station elevation level, critical for relative height offsets calculation.
Target Distance / Downtilt Dynamic parameters defining either spatial link separation range length or primary mechanical beam axis angle tilts.
Vertical Beamwidth Angle The beam divergence spread width aperture slice tracking bounds down to half-power (-3 dB) limits.

Practical Operational Examples

Example 1: Long Range Sector Site (Distance Mode)
• Transmitter Height = 120 ft | Receiver Height = 20 ft | Main Target Distance = 2500 ft
• Beamwidth Angle = 8.0°
• Expected Downtilt Angle: 2.2906° | Inner Footprint: 928.32 ft | Outer Footprint: -5859.34 ft
Example 2: Macro Site Downtilt Optimization (Downtilt Mode)
• Transmitter Height = 150 ft | Receiver Height = 30 ft | Specified Downtilt = 5.0°
• Beamwidth Angle = 6.0°
• Expected Receiver Range Distance: 1371.62 ft | Inner Footprint: 854.37 ft | Outer Footprint: 3433.80 ft

Antenna Downtilt and Radiation Coverage Footprint

The vector schematic scales mechanical link properties matching beam boundaries relative to structural horizon references down onto targeted footprint coverage ranges.

Distance Ht Transmitter 0° Horizon Downtilt Angle Beam Width Inner Radius Outer Radius Receiver Hr

Formulas & Mathematical Logic

Distance Link Computation Mode (Calculates Angle & Radius Spans):
• Downtilt Angle = atan((Ht - Hr) / Distance)
• Inner Radius Footprint = (Ht - Hr) / tan(Downtilt + Beamwidth / 2)
• Outer Radius Footprint = (Ht - Hr) / tan(Downtilt - Beamwidth / 2)
Downtilt Optimization Mode (Calculates Linear Separation Range):
• Receiver Range Distance = (Ht - Hr) / tan(Downtilt)
• Inner Radius Footprint = (Ht - Hr) / tan(Downtilt - Beamwidth / 2)
• Outer Radius Footprint = (Ht - Hr) / tan(Downtilt + Beamwidth / 2)

The system leverages basic trigonometric angular relationships to map signal dispersion boundaries down onto targeted terrestrial geographic matrices safely.

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About this tool

Antenna Downtilt and Coverage Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.