RADAR

RAdio Detection And Ranging

Targets ?

Range ?•Distance

R

How to find out the location of the target?

How to find out the velocity of the target?

• By measuring frequency shift using Doppler effect.

TP

1 nmi (nautical mile) = 1.852 Km

----Pulse compression

Klystron or TWT or transistor amplifierOr power osc. Like magnetron

Low power signalw/g

Mechanically/Electronically steered planar/phased array

Scan

PPI (plain position indicator)

Not necessarily the limits, may use up to 240 GHz (mm wave radar)

However it

Radar equation becomes

integration.

Integration methods

When to use pre / post detection integration?

Typical scan timeApplications

General 10 - 12 seclong-range military 4 secshort-range military 1-2 sechigh resolution radars 1 sec

Solution

To obtain more complete coverage