Radar

In a RADAR system the transmitter of the radar is more sensitive than the receiver.

• True

• False

For radar system, antennas with a large beam width are preferred over narrow beam antennas.

• True

• False

Tags

NGSS.HS-PS4-5

The radar in which both transmission and reception is done using the same antenna are called:

• Monostatic radar

• Bistatic radar

• Monopole radar

• Dipole radar

For applications like missile fire control, bistatic radars are used.

• True

• False

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

When a power Pt is transmitted by an antenna, amount of energy incident on the target is given by the expression:

• Pt×G/4πR^2

• Pt/4πR^2

• Pt×4πR^2/G

• None of the above

The term radar cross section defines the:

• Scattering ability of the target

• Power radiating ability of the radar

• Amount of energy scattered by unwanted objects

• Cross section of radar area through which energy is emitted

Tags

NGSS.HS-PS4-5

Construction of pulse radar is much simpler than a Doppler radar.

• True

• False

A ________ determines the target range by measuring the round trip time of a pulsed microwave signal.

Tags

NGSS.HS-PS4-3

NGSS.HS-PS4-5

In military applications the radar cross sections of vehicles is minimized.

• True

• False

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS4-5

Pulse radar operating at 10GHz frequency has an antenna with a gain of 28 dB and a transmitted power of 2kW. If it is desired to detect a target of cross section 12m^2, and the minimum detectable signal is -90 dBm, the maximum range of the radar is

• 8225 m

• 8114 m

• 7202 m

• 6806 m

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3