Magnetrons ne na'urar injin lantarki da ake amfani da ita don samar da makamashin microwave. Ainihin lissafin diode da aka sanya a cikin filin magnetic na yau da kullun. A cikin bututun lantarki a ƙarƙashin ikon juna tsaye na musamman magnetic filin da kuma musamman lantarki filin, tare da high mita electromagnetic filin hulɗa, da kuma sauya makamashi samun daga musamman lantarki filin zuwa microblog makamashi, don haka cimma makamashi na samar da microwave makamashi. A lokaci guda, magnetrons ne wani consumables, sauki tsufa da demagnetization.

Magnetron ya ƙunshi wani hatimi injin bututun, a cikin bututun da wani ginshiƙi tsakiya cathode (lantarki tushen), sanya a cikin wani ginshiƙi anode, da lantarki jan hankali zuwa anode da static filin. A kwanciyar hankali magnetic filin a gefen injin bututun shaft amfani da lantarki karkatar da shi radial hanya. Juya kewaye da cathode, samar da oscillations na microwave mita. Ana amfani da shi sosai don radar janareta.