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Active radar vs Passive radar-Difference between Active radar and Passive radar

This page compares Active radar vs Passive radar and mentions difference between Active radar and Passive radar types.

RADAR is the short form of the term "Radio Detection And Ranging". The radar system transmits pulse of high frequency EM waves towards the probable target which reflects from the target. The reflected pulse is received by radar antenna to determine distance, angle, direction and speed of the target from the radar. Refer RADAR tutorial>>.

Active Radar

active radar

Figure-1 depicts active radar working operation. Following are the features of active radar.
• It emits radio frequency pulse towards target and receives reflected pulse from the target.
• In this radar system, transmitter and receiver are located at the same place. Hence it is known as monostatic radar.
• Range of target (i.e. D) = c*t/2
Where, c = 3 x 108 meters/second
t = time delay between signal emission and reception from the target i.e. total time.

Example:
AESA Radar (Active Electronically Scanned Array Radar)
Refer AESA Radar basics for more information.

Passive Radar

passive radar

Figure-2 depicts passive radar working operation. Following are the features of passive radar.
• It also emits radio frequency pulse from transmitter and receives pulse reflected from the target at the receiver.
• In this radar system, transmitter and receiver are located at the different places. Hence it is known as bistatic radar.

Example:
PESA Radar (Passive Electronically Scanned Array Radar)

Also refer difference between AESA radar Vs PESA radar >> and Monostatic radar Vs Bistatic radar >>.

RADAR RELATED LINKS

RADAR tutorial   Doppler Radar   FMCW RADAR   RADAR BANDs   RADAR SCOPE   Weather Radar   Ground Penetrating Radar System   RADAR RANGE and RESOLUTION  

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