| A. TWT | B. Magnetron | C. Reflex klystron | D. Gunn diode |
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Which one is used for amplification of microwave energy?
| A. TWT | B. Magnetron | C. Reflex klystron | D. Gunn diode |
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Which of the following is used as the high power microwave oscillator?
| Q. Which of the following is used as a high power microwave oscillator? | B. magnetron | C. klystron | D. reflex-klystron | Answer» b. magnetron |
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In which vacuum tube axial magnetic field and radial electric field are used?
A Microwave tube amplifier uses an axial magnetic field and radial electric field.
Which of the following is the main advantage of microwave?
You can directly control cooking time , thus you have much better control over how much power you use. They also don't retain heat nor do they heat up everything in your kitchen. Microwave ovens use less energy than all conventional ovens or stoves since they directly heat up the water in the food.
What is the major disadvantage of klystron amplifier?
| Q. A major disadvantage of klystron amplifier is: | C. high source power | D. design complexity | Answer» b. low bandwidth |
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Which diode is used as microwave power sources?
Because of their high frequency capability, Gunn diodes are mainly used at microwave frequencies and above. They can produce some of the highest output power of any semiconductor devices at these frequencies. Their most common use is in oscillators, but they are also used in microwave amplifiers to amplify signals.
Which microwave oscillator is used in microwave oven?
The magnetron is an oscillator where electrons are emitted from a hot cathode and whirl past resonant cavities which are part of the anode at speeds that generate microwave energy.
Which microwave tube has a series of cavities?
Explanation: Extended interaction oscillator is a linear beam oscillator that uses an interaction region consisting of several cavities coupled together, with positive feedback to support oscillation. 10. Magnetrons are microwave devices that offer very high efficiencies of about 80%.
What are the two basic types of TWT?
A traveling-wave tube (TWT) is a specialized vacuum tube used in wireless communications, especially in satellite systems. The TWT can amplify or generate microwave signals. Two common types of TWT include the Klystron and the magnetron .
What type of waveguide is widely used?
Circular waveguides , commonly referred to as optical fibers, are the most common form of light waveguide used for optical communication.
What is the function of the magnetron?
A magnetic field is applied longitudinally by an external magnet. Connected to a resonant line, it can act as an oscillator. Magnetrons are capable of generating extremely high frequencies and also short bursts of very high power . They are an important source of power in radar systems and in microwave ovens.
Is microwave highly directive?
Better Directivity: At Microwave Frequencies, there are better directive properties. This is due to the relation that As Frequency Increases, Wavelength decreases and as Wavelength decreases Directivity Increases and Beam width decreases. ... As Microwaves have high frequency thus requires very less power.
Which one of the following is passive microwave components?
Microwave passive components may be composed of lumped elements ( inductors, capacitors, and resistors ) or distributed elements (transmission line sections and discontinuities) or both.
What is microwave wavelength?
The microwave region extends from 1,000 to 300,000 MHz (or 30 cm to 1 mm wavelength ).
What is main advantage and disadvantage of Twta?
➨It provides higher gain . The gain levels upto 40 dB can be achieved with single device. ➨It delivers moderate peak power and average peak power. ➨Coupled cavity TWT can deliver efficiencies upto 60% and gain upto 70 dB.
