Calculate radar beam width — beam

Calculates the width of a radar beam as a function of range and beam angle.

beam_width(range, beam_angle = 1)

Arguments

range: numeric. Range (distance from the radar antenna) in m.
beam_angle: numeric. Beam opening angle in degrees, typically the angle between the half-power (-3 dB) points of the main lobe

Value

numeric. Beam width in m.

Examples

#' # beam width in meters at 10 km range:
beam_width(10000)
#> [1] 174.5241

# define ranges from 0 to 1000000 meter (100 km), in steps of 100 m:
range <- seq(0, 100000, 100)

# plot the beam width as a function of range:
plot(range, beam_width(range), ylab = "beam width [m]", xlab = "range [m]")