4-4. Microwave generation system_Magnetron (1/2)
GASKET
FILAMENT (CATHODE)
ANODE
MAGNET (FERRITE)
FILTER CASE
FILTER
ANTENNA (OUTPUT) MAGNET (MAGNETIC CIRCUIT)
VANE
FILAMENT TERMINALS
FEED THROUGH CAPACITOR
ELECTRONS
ANODE
ANTENNA
CATHODE
*The magnetron is the energy source for the microwave oven. The magnetron is a vacuum tube of special construction.
It is basically a diode with addition of a magnetic field.
It consists of a small, coiled heating element (filament) made of tungsten which readily emits electrons when heated.
This element serves as the cathode (negative element) within the tube. The anode (positive element of the tube) consists of a thick walled copper cylinder with vertical vanes extending inward which surround but do not touch the cathode.
To complete the magnetron, and make it operate distinctly different from other vacuum tubes, two permanent magnets are mounted over each end of the tube.
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