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Neets Module 18-Radar Principles | Next
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The MINIMUM RANGE of a radar system can be calculated from the formula:
The MAXIMUM RANGE of a pulse radar system depends on the CARRIER FREQUENCY,
PEAK POWER, PULSE-REPETITION FREQUENCY, and RECEIVER SENSITIVITY.
PULSE-REPETITION TIME is the time between the beginning of one pulse and the beginning of
the next pulse and is the reciprocal of prf.
AMBIGUOUS RETURNS are echoes from targets that exceed the prt of the radar system and result
in false range readings. The maximum (unambiguous) range for a radar system can be determined by the
formula:
The PEAK POWER of a radar system is the total energy contained in a pulse. Peak power is
obtained by multiplying the maximum power level of a pulse by the pulse width.
Since most instruments are designed to measure AVERAGE POWER over a period of time, prt must
be included in transmitter power measurements. The formula for average power is:
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