Sensors 3

Question 1

What are the component of a RADAR?

Answer 1

1. Transmitter = Provides RF energy at extremely high power
2. Receiver = Very sensitive super heterodyne Rx; accepts signals 1-10 MHz; detect and amplifies the echoes; changes echoes to video and sends a signal to the indicator.
3. Antenna = Highly directional; duplexer to switch from Tx to Rx; Normally a rotating planar array
4. Power supply
5. Indicator = Method of presenting data depends on the RADAR’s purpose
6. Modulator = Stores energy between pulses; determines waveform (shape); Sync tells it when to release Energy
7. Synchronizer = Timing for entire system: determine the PRF, rage marks ad triggers the modulator

Question 2

What are some common indicator presentations?

Answer 2

A= Determine range but rough direction
B= Determine range, target size, and bearing 
C= Night fighter to follow enemy
J= normally used as a RADALT
E= normally used as a precision approach radar (PAR)
PPI= Provides a map like picture/most common/Plan Position Indicator