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Microwave Communication
What allow microwave to pass in only one direction?
Ferrite emitter
Varactor-triac
Capacitor
RF emitter
Ferrite emitter
Varactor-triac
Capacitor
RF emitter
Answer
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Related Question
Microwave Communication
Klystron oscillators are most often used in the frequency range of
30 to 30000 MHz
3000 to 30000 MHz
10 to 10000 MHz
300 to 3000 MHz
30 to 30000 MHz
3000 to 30000 MHz
10 to 10000 MHz
300 to 3000 MHz
Answer
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Microwave Communication
As the electron beam moves through a klystron’s intercavity drift space
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
Velocity modulation at the input cavity creates density modulation at the output cavity
Frequency modulation at the input cavity creates velocity modulation at the output cavity
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
Velocity modulation at the input cavity creates density modulation at the output cavity
Frequency modulation at the input cavity creates velocity modulation at the output cavity
Answer
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Microwave Communication
In a pulsed radar set, the STC circuit is used to
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
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
Answer
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Microwave Communication
A Class-S Emergency Position-Indicating Radio Beacon (E.P.I.R.B)
May be tested during the first five minutes of any hour
Must have its battery replaced after emergency use
Must be capable of floating or being secured to a survival
All of these
May be tested during the first five minutes of any hour
Must have its battery replaced after emergency use
Must be capable of floating or being secured to a survival
All of these
Answer
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Microwave Communication
The frequency of the oscillation generated by a magnetron, is mainly determined by
The number of the cavity resonators
The ratio of the dc cathode voltage to the magnetic flux density
The dimension of each cavity resonator
The flux density of the external magnet
The number of the cavity resonators
The ratio of the dc cathode voltage to the magnetic flux density
The dimension of each cavity resonator
The flux density of the external magnet
Answer
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