Microwave apparatus having coaxial waveguide partitioned by vacuum-tight dielectric plate
AssigneeKabushiki Kaisha Toshiba
InventorsKeiji Ohya, Yoshio Kawakami
Life of this patent
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Abstract
In a microwave apparatus with an air-tight window plate, first and second coaxial waveguide assemblies are coupled to each other so that a coaxial waveguide is formed. The first and second inner conductor sections of the first and second assemblies have first and second metal blocks. The first metal block is fitted in the second metal block by a shinkage fit and the first outer conductor section of the first assembly is air-tightly welded to the second outer conductor section of the second assembly. An RF matching annular groove is defined between the first and second metal blocks.
Claims8
A microwave apparatus comprising:
- a microwave resonant cavity;
- first coaxial waveguide assembly having first outer and inner conductor sections which are air-tightly coupled to and extended from said microwave resonant cavity and a first thick metal block, and the first inner conductor section being coaxially located inside of the first outer conductor section and provided with a distal end section to which the first thick metal block is fixed, the first thick metal block being provided with a distal end face, a first cylindrical recess of a predetermined depth opened at the distal end face and a second cylindrical recess coaxially arranged with the first cylindrical recess and opened in the first cylindrical recess, and the second cylindrical recess having a diameter smaller than that of the first cylindrical recess;
- and
- a second coaxial waveguide assembly air-tightly coupled to said first coaxial waveguide assembly to assemble a coaxial waveguide of the microwave apparatus, said second coaxial waveguide assembly having a second outer conductor section which is provided with a first thin metal cylinder, a second inner conductor section which is coaxially arranged in the second outer conductor section and provided with a second thin metal cylinder and a distal end, a second thick metal block fixed to the distal end of the second inner conductor, and an air-tight dielectric window plate which is air-tightly jointed between the inner and outer thin metal cylinders to define a vacuum space, wherein the second metal block is fitted in the second cylindrical recess of the first metal block in the vacuum space and mechanically and electrically connected thereto to form an inner coupling section and the first outer conductor section being air-tightly welded to the second outer conductor section to form an outer coupling section, the inner coupling section having a high frequency matching annular groove being defined between the second metal block and the first metal block.
Dependencies are inferred from the claim text.