This calculator determines the radar blind speed and wavelength for a given frequency and pulse repetition time (PRT). It helps identify the target speeds that cause Doppler blind zones, where radar cannot detect motion accurately.
Formulas
λ = c / f
v = (λ × 10⁹) / (2 × PRT)
where c = 299,792,458 m/s
Formula Explanation
- λ is the wavelength of the radar signal.
- f is the operating frequency in Hz.
- PRT is the pulse repetition time in microseconds.
- v is the blind speed, the velocity where Doppler frequency equals the pulse rate.
Example
Input: f = 10 GHz, PRT = 200 µs
Result: λ ≈ 0.03 m, v ≈ 75 m/s
Who uses it
Helpful for radar engineers and defense system designers to avoid detection gaps and optimize radar performance.