MICROWAVE COMMUNICATION QUIZ

Tunnel diode

Thyratron tube

Klystron tube

Both B and C

The shortest possible time

The restricted high-frequency response

A long time constant

Low-pass filters

Delayed spreading

Random Doppler shift

Slow fading

Rayleigh fading

Propagation

Attenuation

Modulation

Radiation

1 GHz

100 GHz

10 GHz

100 MHz

Vary the pulse frequency in order to control the maximum target

Reduce interference from the effects of sea return

Increases receiver sensitivity for echoes from targets

Improve the target bearing resolution

The energy contained the cavity resonators

The absorption of energy by the signal from an electron stream

The effect of an external magnetic field

The energy liberated form the collector

To shield the electron beam from unidirectional magnetic

All of these

To focus the beam of primary electrons

As a second anode and to prevent the build-up of secondary field

By bunches of electrons passing the cavity grids

By feedback between the accelerating grid and the repeller

By circulating bunches of electrons within the cavities.

By plate-to-cathode feedback

A low repetition rate

A narrow, antenna-beam width in the vertical plane

A high duty cycle

A narrow, antenna-beam width in the horizontal plane