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Microwave Communication

Microwave Communication
In an SHF pulsed radar set, a reflex klystron can be used as a

Duplexer stage
Single mixer stage
Local oscillator
Transmitter oscillator

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Microwave Communication
Which of the following is used as an oscillator device in the SHF band?

Klystron tube
Both B and C
Thyratron tube
Tunnel diode

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Microwave Communication
In microwave transmission using digital radio, what causes most intersymbol interference?

Delayed spreading
Slow fading
Random Doppler shift
Rayleigh fading

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Microwave Communication
Which of the following operating frequencies is used for the modern loran navigational system?

Loran D: 10.2 kHz
Loran C: 100 kHz
Loran A: 1950 kHz
Loran B: 900 kHz

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Microwave Communication
What allow microwave to pass in only one direction?

Capacitor
Ferrite emitter
RF emitter
Varactor-triac

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Microwave Communication
Which of the following permits a microwave signal to travel in one direction with virtually no loss, but severely attenuates any signal attempting to travel in the reverse direction?

Circulator
Wave trap
Tunnel diode
Isolator

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