The hydrogen in the gauge is ionized by electron emission from a heated cathode . 在离子计内的氢气是用一个加热阴极放射电子来电离的。
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Indirectly heated cathode 旁热式阴极
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Directly heated cathode 直热式阴极
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A microwave tube in which electrons generated from a heated cathode are affected by magnetic and electric fields in such a way as to produce microwave radiation used in radar and in microwave ovens 在微波系统中，来自各处的分散的输入必须被汇集在一起，以形成一个综合的输入，然后由无线电发送和接收。
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A microwave tube in which electrons generated from a heated cathode are affected by magnetic and electric fields in such a way as to produce microwave radiation used in radar and in microwave ovens 磁控管一种微波管，它里面的发热阴极发出的电子受到磁场和电场的影响，从而产生能用于雷达和微波炉微波辐射
