What is magnetron and its principle?

What is magnetron and its principle?

The Magnetron is called as Cavity Magnetron because the anode is made into resonant cavities and a permanent magnet is used to produce a strong magnetic field, where the action of both of these make the device work.

What is the function of magnetron?

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.

What are the three categories of magnetron?

There are three types of magnetrons:

• Negative resistance type.
• Cyclotron frequency type.
• Travelling wave or Cavity type.

What are the parts of a magnetron?

The main components of a magnetron include a cathode, a cylindrical anode, a resonant system or tank circuit, and a magnet. The trajectories of the electrons in an oscillating magnetron are extremely complicated and intersect in such an intricate manner that no coherent flow pattern is established.

Why magnetron is called cross field device?

The magnetron is called a “crossed-field” device in the industry because both magnetic and electric fields are employed in its operation, and they are produced in perpendicular directions so that they cross. The applied magnetic field is constant and applied along the axis of the circular device illustrated.

What is pi mode in magnetron?

For sustaining the oscillation in a magnetron, the phase difference between two adjacent anode plate should equal (2πn/N) where N is the number of cavities and n is any integer, this gives rise to π mode operation.

What are the 3 components of a microwave?

An industrial microwave is made up of three basic components. A generator or transmitter, waveguide and an applicator.

Why strapping is used in magnetron?

The cavity magnetron is acts like a microwave oscillator and generates microwaves and it uses strapping to prevent mode jumping.

What are M type tubes?

In cross-field tubes — also called ‘M-type’ tubes after magnetrons — the electron beam moves under the influence of perpendicular static electric and magnetic fields.

What is a microwave capacitor?

Microwave capacitors are used as tuning elements, or as components in simple or complex filter structures. Used as a tuning element, a high tolerance is often required on a low capacitance value. Used as a DC block or bypass, usually all that you will care about is a that your RF signal sees a low impedance.

What is O type tube?

In O – type tube a magnetic field whose axis coincides with that electron beam is used to hold the beam together as it travels the length of the tube. It is also called as linear beam tube.

What is diode in microwave?

What does the diode do? The microwave diode converts the alternating current (AC) power output of the transformer to direct current (DC), doubling the voltage to nearly 5,000 volts. This high voltage powers the magnetron to heat the food or beverage placed in the oven cavity.

How many volts is a microwave capacitor?

The high voltage capacitor in a microwave is rated in microfarads, which is one or less and up to 2100 volts.