OPMW Quiz

The production of power at higher frequencies is much simpler than production of power at low frequencies.

• True

• False

Microwave tubes are power sources themselves at higher frequencies and can be used independently without any other devices.

• True

• False

Microwave tubes are grouped into two categories depending on the type of:

• Electron beam field interaction

• Amplification method

• Power gain achieved

• Construction methods

The klystron tube used in a klystron amplifier is a _________ type beam amplifier

• Linear beam

• Crossed field

• parallel beam

• None

________ is a single cavity klystron tube that operates as on oscillator by using a reflector electrode after the cavity.

• Reflex Klystron

• TWT

• Magnetron

• Backward wave oscillator

A major disadvantage of klystron amplifier is:

• Low Power Gain

• Low Bandwidth

• High Source Power

• Design Complexity

Klystron amplifiers have high noise output as compared to crossed field amplifiers.

• True

• False

Magnetrons are microwave devices that offer very high efficiencies of about 80%.

• True

• False

Reflex Klystron is a

• Low Power Generator

• High power Generator

• Low gain amplifier

• High gain amplifier

1.     The modes in a reflex klystron

• give the same frequency but different transit timeg

• result from excessive transit time across the resonator gap

• are caused by spurious frequency modulator

• are just for theoretical considerations