Embodiments of the present invention generally provide a magnetron that is encapsulated by a material that is tolerant of heat and water. In one embodiment, the entire magnetron is encapsulated. In another embodiment, the magnetron includes magnetic pole pieces, and the magnetic pole pieces are not covered by the encapsulating material.

A magnetically insulated line oscillator (MILO) that is a high power microwave (HPM) source. A cross field device with a plurality of azimuthally extending spaced apart slats.

A magnetically insulated line oscillator (MILO) that is a high power microwave (HPM) source. A cross field device with a plurality of azimuthally extending spaced apart slats.

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio of the height H1 of the tube core to a height H2 of the output ceramic ranges from 0.4 to 2.3.

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio of the height H1 of the tube core to a height H2 of the output ceramic ranges from 0.4 to 2.3.

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio H1/S of a height H1 of the tube core to a cross-sectional area S of the antenna ranges from 0.4 to 3.3.

Provided are a magnetron and a microwave heating device. The magnetron includes a tube core, a first tube shell, a second tube shell, an output ceramic, an antenna cap, and an antenna. The first tube shell, the tube core, the second tube shell, the output ceramic, and the antenna cap are connected in sequence. The antenna extends into the tube core, and sequentially passes through the second tube shell and the output ceramic and extends into the antenna cap. A height H1 of the second tube shell relative to the tube core is smaller than or equal to 14 mm, and a ratio H1/S of a height H1 of the tube core to a cross-sectional area S of the antenna ranges from 0.4 to 3.3.