Intoduction to Radar

In continuous wave radar how are the radio frequency (RF) energy radiated?

• In very short bursts, followed by long resting periods for reception.

• Continuous wave for propagation without resting periods for reception.

• Continuous wave for propagation with resting periods for reception.

• In very short bursts, with no resting periods for reception.

When a secondary radar is use for identification purposes, the transponder is located in the

• aircraft

• radar beacon

• air traffic control radar

• ground surveillance radar

Noise on the Type A display will appear as

• grass

• snow

• blips

• flashing spots

The aerial angle of elevation and angular position are transmitted to the display through which of the following unit?

• Synchro Unit

• Time-Base Generator

• T/R Switch

• Master Timing Unit

Conical Scanning is used for

• locating of targets

• tracking of targets

• detecting of targets

• searching of targets

The FMCW radar altimeter determines altitude by measuring the

• Doppler Shift Frequency

• Atmospheric Air Pressure

• Difference between the transmitter frequency and received echo frequency

• Time difference between the transmitted pulse and echo pulse

The type of radar transmitter that produce a signal generated from internal oscillators whose phase is known prior to transmission is known as

• Coherent Amplifying Transmitter

• Coherent On-Transmit Transmitter

• Coherent On-Receive Transmitter

• Non Coherent Transmitter

To convey EM energy at frequency of 10GHZ, the appropriate transmission line should be _________ .

• Open Wire

• Coaxial Cable

• Single Core Transmission Cable

• Waveguide

Which one of the following is NOT a function of receiver?

• Amplification

• Noise figure measurement

• Filtering

• Demodulation

Beamwidth is defined as ____________________________.

• The angular width of the sidelobe where the response is 3dB of the peak response

• The angular width of the main beam where the response is 3dB of the peak response

• The angular width of the main beam where the response is 6dB of the peak response

• The angular width of the main beam where the response is 3dB of the lowest response