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Magnetron
The Copa Express is equipped with two magnetrons in the microwave circuit. The structure of the
Magnetron is basically composed of anode, filament (cathode), and the antenna. The anode is a
hollow iron piece with several open cavities which are constituted by an even number of flaps
pointing to the filament. The antenna is connected to the anode flaps. The filament (cathode) is
located in the center of the Magnetron.
The cathode in the Magnetron is a filament that is supplied by the low voltage secondary (3.6 V) of
the transformer which emits electrons when heated. These negatively charged electrons are
attracted by the anode which is positively charged when the 4.000V are applied to the cathode.
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