摘要:
A magnetron includes an anode cylindrical body, a plurality of vanes, a cathode filament, an input-side magnetic pole, an output-side magnetic pole, and a choke structure. The anode cylindrical body has a cylindrical shape with an input-side opening part and an output-side opening part. The plurality of vanes is radially disposed from a central axis of the anode cylindrical body to an inner wall surface of the anode cylindrical body. The cathode filament is disposed along the central axis of the anode cylindrical body. The input-side magnetic pole and the output-side magnetic pole are disposed on the input-side opening part and the output-side opening part, respectively. The choke structure is seamlessly formed and disposed so as to cover an opening rim of the input-side magnetic pole with respect to the central axis of the anode cylindrical body.
摘要:
L'invention concerne un procédé de réalisation par ablation laser sur un substrat métallique d'un revêtement anti-multipactor dont le matériau constitutif est choisi parmi les métaux de la colonne 10 ou colonne 11 du tableau de Mendeleïev ou un alliage de ces métaux et dont la texture comprend un ou plusieurs motifs répétés, à intervalles réguliers de cavités, le pas d'intervalle entre deux cavités adjacentes étant compris entre 0 et 100 µm.
摘要:
Magnetron (1) includes anode cylinder (5), cooling block (10), a fastener, and a pair of pipe joints (14a, 14b). The fastener is disposed between the pipe joints (14a, 14b) of cooling block (10), and a discontinuous part between both ends of cooling block (10) facing each other extends tilted in an annular direction of cooling block (10) relative to a flow direction of cooling liquid at a connecting part of the pair of pipe joints (14a, 14b) and circulation passage. The fastener passing the discontinuous part extends in a tilted manner relative to a face perpendicular to the flow direction of the cooling liquid at the connecting part of the pair of pipe joints (14a, 14b) and circulation passage.
摘要:
A gap is provided between a cooling block 22 and a magnetic yoke 20. A cushioning material 25 is interposed in the gap to fix the cooling block 22 relatively to the magnetic yoke 20 by screws. Thus, even when metals having a large difference in tendency of ionization are used in the cooling block 22 and the magnetic yoke 20, the corrosion of the metals hardly arises. Further, the cushioning material 25 is provided in the gap between the cooling block 22 and the magnetic yoke 20, so that an impact or vibration to an anode tubular member 10 can be mitigated and the disconnection and deficiency of the filament of a cathode structural member can be reduced. Further, since a dimensional unevenness of the cooling block 22 or the magnetic yoke 20 can be absorbed by the cushioning material 25, the dimensional accuracy of parts does not need to be improved to make an assembly easy.
摘要:
The invention relates to a travelling wave tube configuration with a travelling wave tube (LR) and a linearization circuit arrangement (S). The aim of the invention is to integrate the linearization circuit arrangement (S) and the travelling wave tube (LR) in one unit and to keep the linearization circuit arrangement (S) at a temperature that is safe and lower than that of the wall (W) of the tube or a common wall in order to protect the linearization circuit arrangement while the tube housing is kept at an admissible high temperature. To this end, an active cooling element (K), preferably a Peltier element, is used.
摘要:
A vacuum tube for handling an r.f. signal having a predetermined frequency range comprises a linear electron beam emitting cathode (136), a heater (166) and a non-electron emissive current modulating grid (138). The grid (138) is positioned from the cathode (136) by the distance an emitted electron from the cathode (136) can travel in a quarter cycle of the r.f. signal. Outer (202) and inner (204) coaxial metal tubes forming a resonant line of a signal coupler (143) are respectively connected to the grid (138) and cathode (136) so electrons passing through the grid (138) are in bundles in an interaction region (20) between an accelerating anode (18) and the grid (138). Ferrite tiles (42) absorb r.f. fields in the interaction region (20). In one embodiment a signal coupling loop (12) is between metal tubes (202,204) at an end of the tubes spaced 3λ/4 from the grid (138) and cathode (136). In a second embodiment the coupler (143) includes a low voltage coaxial line (110) having an inner conductor (112) connected to a first metal face (125), spaced from a second opposed metal (134) face by a solid dielectric (140). The coaxial outer conductor (114) is connected to a third metal face (128), spaced from a fourth opposed metal face (142) by the solid dielectric (140). The third (128) and fourth (142) faces surround the first (125) and second (134) faces. The first (115) and third (128) faces are at DC ground potential while the second (134) and fourth (142) faces are at high negative DC voltages. The second (134) and fourth (142) faces are respectively at common ends of interior (204) and exterior (202) coaxial metal tubes forming a λ/2 coupler (143). Other ends of the tubes (202,204) are connected to the cathode (136) and grid (138). Bias leads (190,194) for the grid (138) and cathode (136) are connected to the exterior (202) and interior (204) tubes at positions λ/4 from the grid (138) and cathode (136), while a heater lead (196) goes through the interior tube (204) at a position λ/4 from the grid (138) and cathode (136).
摘要:
An anode assembly of a magnetron includes an anode cylinder (l0) and a plurality of anode vanes (l2) arranged in the cylinder. The cylinder has a plurality of projections (22) protruding from the inner surface thereof. A connecting end portion (l2a) of each vane is engaged with the inner surface of the cylinder and located between the corresponding projections. The connecting end portion is mechanically fixed to the inner surface of the cylinder by caulking the projections, and electrically connected to the cylinder by soldering. In manufacturing of the assembly, the vanes are fixed to the cylinder by caulking the projections while they are positioned with respect to the cylinder by a positioning jig. The, the vanes and cylinder are soldered to each other after removing the positioning jig from the assembly.