This calculator determines the blind speed and wavelength of a radar signal. It helps identify the rates at which a target becomes invisible to radar when the Doppler shift matches the pulse repetition frequency.
Ideal for radar engineers, sensing researchers, and surveillance systems students who want to optimize performance and reduce blind zones in radar systems.
Formulas
λ = c/f
v = (λ × 10⁹) / (2 × PRT)
where c = 299792458 m/s
Explanation of formulas
- λ is the wavelength of the radar signal in meters.
- f is the radar frequency in Hz.
- PRT is the pulse repetition time in nanoseconds.
- v represents the rate at which the target becomes invisible due to Doppler aliasing.
Radar blind speed for 10 GHz radar frequency
Input : f = 10 GHz, PRT = 1000 ns
Output : λ = 0.03 m, v ≈ 15 m/s
Benefits and uses
- Allows you to determine speeds not detectable by a given radar.
- Improves radar configuration to reduce blind spots.
- Useful for the design, calibration and analysis of detection systems.
- Educational tool to understand the effects of Doppler and PRT.