Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Microwave Communication
Theoretically electromagnetic radiation field strength varies in inverse proportion to the square of the distance, but when atmospheric attenuation effects and the absorption of the terrain are taken into account the attenuation can be as high as the inverse ___________ power of the distance.

Fifth

Third

Fourth

Sixth

Fifth

Third

Fourth

Sixth

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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?

Tunnel diode

Wave trap

Isolator

Circulator

Tunnel diode

Wave trap

Isolator

Circulator

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Microwave Communication
In a pulsed radar set, the function of the duplexer is to

All of these

Allow the transmitter and the receiver to operate from a common antenna

Prevent frequency drift in the klystron

Aid in calibrating the display unit

All of these

Allow the transmitter and the receiver to operate from a common antenna

Prevent frequency drift in the klystron

Aid in calibrating the display unit

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Microwave Communication
What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

Isolator

Circulator

Simplex

Magnetron

Isolator

Circulator

Simplex

Magnetron

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Microwave Communication
Microwave frequencies are normally regarded as those in the range of

1000 to 10,000 GHz

1 to 100 GHz

10 to 1000 GHz

1 to 500 MHz

1000 to 10,000 GHz

1 to 100 GHz

10 to 1000 GHz

1 to 500 MHz

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Microwave Communication
The Gunn diode oscillator

Operates over a positive resistance characteristic

Generates frequencies which are below 100 MHz

Depends on the formation of charge domain

Is capable of generating continuous microwave power of the order of kilowatt

Operates over a positive resistance characteristic

Generates frequencies which are below 100 MHz

Depends on the formation of charge domain

Is capable of generating continuous microwave power of the order of kilowatt

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Microwave Communication

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?

Microwave Communication In a pulsed radar set, the function of the duplexer is to

Microwave Communication What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

Microwave Communication Microwave frequencies are normally regarded as those in the range of

Microwave Communication The Gunn diode oscillator

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?

Microwave Communication
In a pulsed radar set, the function of the duplexer is to

Microwave Communication
What ferrite device can be used instead of duplexer of isolate microwave transmitter and receiver when both are connected to the same antenna?

Microwave Communication
Microwave frequencies are normally regarded as those in the range of

Microwave Communication
The Gunn diode oscillator