41 results about "Relativistic magnetron" patented technology

The present invention provides a relativistic magnetron with axial extraction, or magnetron with diffraction output (MDO), with a mode converter placed directly within the diffraction output of radiation to effectively convert the operating π-mode into a radiated mode of simpler radiation patterns.

The invention discloses a strong field mode filter only with a TM mode. The strong field mode filter comprises a hollow structure composed of a parasitic mode absorption component and a heat dissipation component. The parasitic mold absorption component comprises connecting flanges at both ends and a resistivity anisotropic component disposed between the connecting flanges. The heat dissipation component includes a casing and a heat sink on the outside the casing. The resistivity anisotropic component is disposed inside the casing in the axial direction. In the TM mode, a loss characteristic is present in the angular direction and the resistivity is much larger than the axial resistivity, and a good conductor is present in the axial direction. The strong field mode filter uses the resistivity anisotropic material to filter out all non-TM modes, has a high power capacity and filters out all non-TM mode parasitic modes. Based on the strong field mode filter, it is possible to carry out mode field control in electronic vacuum device such as a virtual cathode oscillator (VCO), a relativistic back wave tube (RBWO), and a relativistic magnetron or a strong field radar system rotating joint, thereby laying a certain technical foundation for promoting the development of microwave millimeter wave related technology.

The invention provides a frequency-tunable axial output relativistic magnetron. The magnetron comprises a magnetron input structure, a magnetron resonant cavity structure, a tuning device, a vacuum sealing device, an additional magnetic field system and an axial output structure, wherein the tuning device is arranged in the magnetron resonant cavity structure, and is sealed by using the vacuum sealing device; the axial output port of the magnetron resonant cavity structure is connected with the axial output structure; and the additional magnetic field system is respectively arranged in the peripheral spatial regions of the input structure of the magnetron resonant cavity structure, a tuning mechanism and the axial output structure respectively. According to the frequency-tunable axial output relativistic magnetron, the tuning device is designed, so that microwave frequency is tunable; the vacuum sealing device is designed, so that damages to the internal vacuum environment of the magnetron are restrained due to the introduction of the tuning mechanism; the additional magnetic field system is designed, so that the entire system becomes more compact, and the size is reduced; and the axial output structure is designed, so that axial output of microwaves can be realized during frequency tuning of the magnetron.

The invention discloses a relativistic magnetron with a double-terminal emitting cathode structure, which belongs to the field of microwave technology. The relativistic magnetron is a full-cavity axial extraction structure, including an anode shell, a high-frequency structure, an energy coupling slot, a fan-shaped waveguide, a coaxial waveguide, a TEM‑TM01 mode converter, an output circular waveguide, a guiding magnetic field coil, and a cathode structure , wherein the cathode structure includes two cathode end caps, two emitter cathodes arranged symmetrically, and a central connecting conductor. The invention adopts the virtual cathode scheme, which can effectively solve the problems of pulse shortening, frequency drift, and efficiency reduction caused by the plasma generated by explosive emission in the interaction interval, and can effectively improve the output power and power conversion of the relativistic magnetron efficiency.

The present invention provides a relativistic magnetron including an anode with an entrant channel, the channel having an input end, an output end and a dimensional discontinuity between the ends. The channel is connected to the magnetron and has an anode defining an interaction space located between the dimensional discontinuity and output end. Also provided is a cathode, located upstream, a spaced distance away from the interaction space towards the input end, the cathode is adapted to send an electron beam into the interaction space where the electron beam forms a virtual cathode in the interaction space.

The invention discloses a compact relativistic magnetron with an axial output structure, belonging to the technical field of high-power microwaves. The structure includes a 10-cavity sunburst relativistic magnetron, a coupling structure as a transition structure, and a ridged circular waveguide output structure. The invention solves the problem that the high-order mode electromagnetic waves faced by the axial diffraction output scheme of the magnetron are difficult to be efficiently utilized, and uses a ridged circular waveguide structure to directly transfer the output energy from the sunburst relativistic magnetron to TE 51 The pattern is extracted efficiently, and the efficiency can reach 70%. At the same time, the total volume of the whole system is significantly reduced. Taking the L-band working state as an example, the radius of the circular waveguide is reduced from 250mm in the existing solution to 130mm, and the overall axial length is reduced from 866mm to 490mm.