The Antenna Downtilt Angle conversion calculator determines the tilt angle of an antenna based on the height difference between two antennas and the distance separating them. It helps engineers plan antenna installations to achieve desired coverage, reduce interference, and optimize signal strength across the target area.
Formula
Downtilt Angle = atan( (Hb – Hr) / Distance )
Formula Explanation
- Hb is the height of the base antenna in meters.
- Hr is the height of the remote antenna or target area in meters.
- Distance is the horizontal separation between the antennas in meters.
- atan represents the arctangent function, which converts the height ratio into an angle measured in radians or degrees.
- The calculator automatically converts entered values to meters for accurate results.
Uses of this calculator
- Determining the required antenna tilt for cellular base station alignment.
- Planning coverage areas for broadcast or microwave links.
- Reducing interference between neighboring antennas by optimizing elevation angle.
- Ensuring proper alignment for long-distance point-to-point links.
What is the antenna downtilt angle for a 50 m base antenna and 10 m remote antenna over 500 m distance?
Input: Hb = 50 m, Hr = 10 m, Distance = 500 m
Output:
- Downtilt Angle = atan((50 – 10) / 500) = atan(40 / 500) = atan(0.08) = 4.57°
- Antenna Downtilt Angle = 4.57 degrees