摘要:
A crossed-field device, such as a crossed-field amplifier, includes a cathode body portion (14) and an anode body portion (16) which cooperate with a crossed magnetic field to maintain electrons in a cycloidal path and to amplify an input signal through the interaction between the electrons and the signal within an interaction space or gap (15). Ceramic grooved windows (25, 26) cover the input and output transformer bodies (50, 51) of the device and provide for reduced secondary emission yield. Additionally, one or more walls of the device are physically structured or chemically treated for further reduction of multipactoring effects. For example, a thin layer of molybdenum oxide may be coated on the anode (16) and/or on the cathode (14) to sustain such multipactoring reduction. Alternatively, one or more of the walls of the device may be grooved for reduced multipactoring operation. The device operates in a switch mode which shuts down between working cycles.
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:
A gyrotron device comprising a magnetron injection gun (10) for emitting a sectionally-ring-shaped electron beam (58), a superconducting coil (62) for applying magnetic field to the electron beam emitted from the gun, a ring-shaped resonator mirror (14) for quasi-optically reflecting and resonating those electromagnetic waves which are oscillated when the electron beam passes along the magnetic lines of force generated by the superconducting coil and which propagate in the radial direction, while radially emitting a portion of the electromagnetic waves, and a plurality of transmission mirrors (82, 84,86) for quasi-optically reflecting and transmitting the electromagnetic waves which have been emitted in the radial direction of the resonator mirror (14).
摘要:
In various representative aspects, the present invention provides systems and methods for waveguides. A waveguide may comprise a housing and a plurality of reflective surfaces configured to couple to the housing. The housing may be configured to couple to an electromagnetic wave beam generator. The electromagnetic wave beam generator may, be configured to provide a wave beam having a polarization substantially similar to its initial polarization. At least one of the plurality of reflective surfaces may be configured to convert the mode of an incident wave beam. The plurality of reflective surfaces may be configured for alignment in a waveguide.
摘要:
In various representative aspects, the present invention provides systems and methods for waveguides. A waveguide may comprise a housing and a plurality of reflective surfaces configured to couple to the housing. Hie housing may be configured to couple to an electromagnetic wave beam generator. The electromagnetic wave beam generator may be configured to provide a wave beam having a polarization substantially similar Io its initial polarization. At least one of the plurality of reflective surfaces may be configured to convert the mode of an incident wave beam. The plurality of reflective surfaces may be configured for alignment in a waveguide.
摘要:
A klystron has a plurality of electron beam paths and plural damped disc-shaped cavities. The plurality of electron beam paths cut the cavities and the Klystron amplifier further comprises an annular input cavity and an annular output cavity disposed around the substantially circular external periphery of respective disc-shaped cavities, and in communication with it. The output cavity is arranged to receive RF power from the electron beams, wherein the cavities are arranged to support one of a single resonant rotating wave in a whispering-gallery mode, and a single resonant standing wave in a whispering-gallery mode.
摘要:
A crossed-field device, such as a crossed-field amplifier, includes a cathode body portion (14) and an anode body portion (16) which cooperate with a crossed magnetic field to maintain electrons in a cycloidal path and to amplify an input signal through the interaction between the electrons and the signal within an interaction space or gap (15). Ceramic grooved windows (25, 26) cover the input and output transformer bodies (50, 51) of the device and provide for reduced secondary emission yield. Additionally, one or more walls of the device are physically structured or chemically treated for further reduction of multipactoring effects. For example, a thin layer of molybdenum oxide may be coated on the anode (16) and/or on the cathode (14) to sustain such multipactoring reduction. Alternatively, one or more of the walls of the device may be grooved for reduced multipactoring operation. The device operates in a switch mode which shuts down between working cycles.