MICROWAVE COMMUNICATION QUIZ

What do you call an attenuation that occurs over many different wavelengths of the carrier?

Slow fading

Rayleigh fading

Wavelength fading

Rician fading

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

Tunnel diode

Both B and C

Klystron tube

Thyratron tube

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If the instantaneous RF potentials on the two sides of a magnetron cavity are of opposite polarity, the operation is in the

π/2 mode

π/4 mode

2π mode

π mode

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The highest frequency which a conventional vacuum tube oscillator can generate is not limited by the

Electron transit time

Inter-electrode capacitance

Distributed lead inductance

Degree of emission from the cathode

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A PPI cathode-ray tube as used on a radar set

Is used to check the percentage of modulation

Indicates both the range and azimuth of a target

Indicates only the range of a target

Is used for receiver alignment

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A high-power microwave pulse of the order of megawatts can be generated by a

Gunn diode

Reflex klystron

Traveling-wave tube

Magnetron

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What allow microwave to pass in only one direction?

Capacitor

Ferrite emitter

Varactor-triac

RF emitter

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At what position is the input signal inserted into a traveling-wave tube?

At the cathode end of the helix

At the control grid of the electron gun

At the collector end of the helix

At the collector

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A magnetron is operated at a duty cycle of 0.001. It has a peak power output of 100 kilo-watts. Its average power is

100 watts

10,000 watts

1,000 watts

1,000,000 watts

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In a radar-set receiver, the usual mixer stage is

And FET

A Rochelle salts crystal

A silicon crystal

A tunnel diode

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