MICROWAVE COMMUNICATION QUIZ

Phase modulation at the input cavity creates velocity modulation at the output cavity.

Density modulation at the input cavity creates velocity modulation at the output cavity

Frequency modulation at the input cavity creates velocity modulation at the output cavity

Velocity modulation at the input cavity creates density modulation at the output cavity

Wave trap

Circulator

Tunnel diode

Isolator

Single mixer stage

Duplexer stage

Local oscillator

Transmitter oscillator

Cavity match

All of these

Waveguide match

Direct coax-helix match

To accelerate the electron

To slow down the signal on the helix

To velocity modulate the electron beam

To keep the electrons from spreading out

1,000,000 watts

100 watts

10,000 watts

1,000 watts

A high duty cycle

A narrow, antenna-beam width in the horizontal plane

A low repetition rate

A narrow, antenna-beam width in the vertical plane

Loran C: 100 kHz

Loran A: 1950 kHz

Loran D: 10.2 kHz

Loran B: 900 kHz

The effect of an external magnetic field

The absorption of energy by the signal from an electron stream

The energy liberated form the collector

The energy contained the cavity resonators

Improve the target bearing resolution

Reduce interference from the effects of sea return

Vary the pulse frequency in order to control the maximum target

Increases receiver sensitivity for echoes from targets