Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Distributed parameter resonator-type magnetron
Patent
1989-01-30
1991-09-17
Laroche, Eugene R.
Electric lamp and discharge devices: systems
Combined load device or load device temperature modifying...
Distributed parameter resonator-type magnetron
315 3969, 315 3975, 313333, 313238, H01J 2550
Patent
active
050497820
ABSTRACT:
In an interaction space (4) defined between a cathode (3) and forward end portions of vanes (2), a permanent magnet (12) applies a uniform direct-current magnetic field along an axial direction of the cathode (3). Direct-current or low-frequency high voltage is applied between the cathode (3) and the respective vanes (2). Spaces (14) enclosed by respective pairs of adjacent vanes (2) and the inner wall of an anode cylinder (1) define cavity resonators. High-frequency electric fields formed in the cavity resonators are concentrated to the forward end portions of the vanes (2), and partially leak into the interaction space (4). Under such conditions, an electron group emitted from the cathode (3) rotates about the cathode (3) in the interaction space (4), thereby interaction takes place between the electron group and the high-frequency electric fields, to oscillate microwaves. The inner surface of a flange part (6) of a top hat (7) supporting one end of a filament (5) of the cathode (3) is located in a position closer to the interaction spaces (4) by length within a range of 0.1 to 0.6 mm from first end surfaces of the vanes (2) along the axial direction, thereby to suppress undesired fifth harmonic generated with the microwaves of a basic frequency at this time.
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Aiga Masayuki
Miki Kazuki
LaRoche Eugene R.
Lee Benny
Sanyo-Electric Co., Ltd.
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