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 relativistic magnetron for realizing a frequency hopping operation by utilizing a transparent negative electrode, and belongs to the technical field of electronic countermeasure. The relativistic magnetron comprises a shell, a co-cavity structured positive electrode, a magnetron resonant cavity, the transparent negative electrode consisting of a plurality of sector negative electrodes, a tuning unit and an energy coupling output apparatus. According to the relativistic magnetron, the conventional columnar negative electrode is designed into the sector transparent negative electrode; the mode conversion between a pi mode and a 2pi mode is realized by changing the relative angle between the negative electrode fan-shaped emitting surface and the fan-shaped resonant cavity; when the relative angle between the negative electrode emitting surface and the fan-shaped resonant cavity is changed, the static electric field distribution between the negative electrode and the positive electrode is changed accordingly; meanwhile, the initial phase position of an electron beam relative to a resonant mode high frequency field is affected as well; therefore, when the negative electrode is rotates, the working mode of the relativistic magnetron is changed along with the change of the relative angle between the negative electrode emitting surface and the fan-shaped resonant cavity so as to fulfill the purpose of changing the frequency agility.

A high-power relativistic magnetron wherein the cathode geometry is shaped to form a DC electric field that has a non-negligible azimuthal component causing preferential selection of the pi mode at startup (suppression of mode competition), a significant increase in radiated power output and time integrated efficiency when compared to standard relativistic magnetron cathode designs.

The invention belongs to the technical field of microwave sources in the high-power microwave technology, and particularly relates to a relativistic magnetron with the rectangular TE10 output mode. According to the relativistic magnetron with the rectangular TE10 output mode, the axial output microwave mode can be purer, and a whole system can be compacter. The novel relativistic magnetron is provided for solving the problems that an existing axial output relativistic magnetron needs the purer single output mode and can not meet the requirements in the aspects such as compacting and miniaturizing. According to the relativistic magnetron, due to the improvement on the structure of anodes of the relativistic magnetron, the design of an axial output transition section, the design of a rectangular output waveguide and the design of an external magnetic field system, purer microwaves in the rectangular TE10 mode can be directly and axially output, and the whole system can be compact and minimized.

The invention discloses a permanent-magnet packaging relativistic magnetron, which is of a whole-cavity extraction axial output structure composed of a cathode outer cylinder, an anode outer cylinder and an axial extraction structure. The permanent-magnet packaging relativistic magnetron comprises a plurality of annular permanent magnets, wherein a part of the permanent magnets sleeve the anode outer cylinder, the other part of the permanent magnets sleeve a cathode in the anode outer cylinder, and the permanent magnets and the magnetron are coaxially arranged. The permanent-magnet packaging relativistic magnetron adopts the internal embedding and external loading combined method for arranging the permanent magnets, enlarges size of the uniform region of the permanent magnets, a part of the permanent magnets are embedded in the interior of the magnetron, the internal space of the magnetron is fully utilized, so that the whole permanent-magnet packaging structure is compact. The permanent-magnet packaging structure can provide the required uniform magnetic field for the relativistic magnetron stably for a long time, so that the relativistic magnetron operates and generates gigawatt-level high-power microwave output, and can be well applied to compact-structured high-power microwave systems running at repeated frequency.

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 makes public a kind of microwave sulfur lamp, includes the relativistic magnetron that produces microwave energy under the electric power action in the inside of the machine's cover; the wave-guide cavity transmits the microwave to the resonant cavity that can make the microwave energy syntonic, the quartz bulb that is designed in the resonant cavity can emit light through the stimulation of microwave energy, the bulb motor that drives the quartz bulb turning; the resonant cavity comprises of metal reflector and interlayer glass. The efficient effect is: since the new microwave resonnant cavity that is made up of the interlayer glass and metal reflector, which improves the coupling competency of the microwave energy and light resource, and then improves the light efficiency, increases the performance of making the light go through, saves the energy source, in addition, the interlayer glass and metal reflector can also make the performance of the microwave shield increase, the new microwave resonant cavity can lessen the volume of the metal reflector in accordance with the practical need, and then make the structure more compact, then reduces the production cost of microwave sulfur lamp; the interlayer glass do also have the effect of good property to prevent dizzy light, and then improve the whole service lifespan of microwave sulfur lamp.

The invention belongs to the technical field of microwave sources in the high power microwave technology and particularly relates to a relativistic magnetron which makes an axially output microwave mode purer, makes a whole system more compact and has a circular TE11 output mode. In order to solve the problems that current axially output relativistic magnetrons need a purer single output mode and existing axially output relativistic magnetrons are not prone to meet the requirements of compactness, miniaturization and the like, the novel relativistic magnetron is put forward. The relativistic magnetron is composed of a coaxial input structure, a resonant cavity structure, an axial output transition section, a circular output waveguide and an external magnetic field system. Due to an improvement on a magnetron anode structure and the design of the axial output transition section, the circular output waveguide and the external magnetic field system, not only can the circular TE11 output mode which is purer be directly output axially, but also the whole system can be more compact and miniaturized.

The invention discloses a compact relativistic magnetron of an axial output structure, and belongs to the technical field of high-power microwaves. The structure comprises a ten-resonant-cavity rising-sun-shaped relativistic magnetron, a coupling structure serving as a transition structure and a ridged circular waveguide output structure. The problem that high-order mode electromagnetic waves aredifficult to use efficiently in the magnetron axial diffraction output scheme is solved, the output energy is directly and efficiently extracted from the rising-sun-shaped relativistic magnetron in aTE51 mode by using a ridged circular waveguide structure, and the efficiency can reach 70%. Meanwhile, the total volume occupation of the whole system is remarkably reduced, and by taking an L-band working state as an example, the radius of the circular waveguide is reduced to 130mm from 250mm in the existing scheme, and the axial full length is reduced to 490mm from 866mm.

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 relativistic magnetron with TE11 mode output, and belongs to the technical field of microwaves. On the basis of an eight-cavity relativistic magnetron, energy of microwaves in adjacent resonant cavities is radially coupled into four first fan-shaped waveguide cavities through respective coupling slots, and a TE11 mode is excited; and then the side wall of the fan-shaped waveguide cavity is used as a mode change insertion piece of the insertion piece type mode converter, and finally, a circular waveguide TE11 mode is directly output. The integrated structure enables the high-power microwave system to be more compact.

The invention discloses a relativistic magnetron output structure with omnidirectional radiation capability, and belongs to the technical field of microwaves. The structure comprises a first transition section, a ridge coaxial waveguide, a second transition section and a radiation structure which are connected in sequence, and the relativistic magnetron is transited to the radiation structure through the first transition section, the ridge coaxial waveguide and the second transition section. The radiation structure excites the slot unit by cutting angular current on the waveguide wall, and a certain included angle is formed between the slot unit and the axis, so that radiation of electromagnetic waves is realized. The structure solves the problems that a high-power microwave radiation system based on the relativistic magnetron is complex in structure, low in output power and large in magnetic field coil, and mode hopping risks exist.

The invention discloses an L-waveband double-injection double-frequency relativistic magnetron, and belongs to the technical field of microwave sources in the high-power microwave technology. The magnetron comprises two high-frequency systems which are in axial communication, and the two high-frequency systems adopt single-port radial output. The magnetron meets the requirement for matching with alow-impedance high-power driving source; the geometrical size of the pulse forming line is reduced, and the whole high-power microwave system is miniaturized and compact. Meanwhile, based on the low-impedance high-power driving source, the single high-frequency system connected in the axial direction can still work under a high-impedance condition, so that influence to the electronic efficiency of the single high-frequency system caused by reduction of the geometric size of the pulse forming line is avoided.

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 virtual cathode inverted relativistic magnetron, and belongs to the technical field of microwaves. The magnetron comprises a cathode, an anode, a reflection cavity, a radio frequency excitation structure, a circular waveguide output structure and a shell transition section. By exchanging the positions of the anode and the cathode, a fan-shaped cathode unit for generatingelectrons is arranged between the end part of the cathode and the anode blade. According to the fan-shaped cathode unit, the problems of pulse shortening, frequency drift, efficiency reduction and thelike caused by plasmas generated by explosive emission in an interaction region are effectively solved; and meanwhile, pre-clustering of favorable electrons can be realized, so that the energy conversion efficiency and the purity of an excitation mode are improved, and the overall efficiency of the device is remarkably improved.

The invention provides an axially tunable relativistic magnetron, which fully utilizes the internal space of the magnetron, does not increase the lateral size of the system, does not occupy the magnetspace, and improves the lightness and miniaturization level of the system. At that same time, because the radial dimension of the system is not changed in the tuning process, the influence on the magnetron impedance is small, and high conversion efficiency can be maintained in a wide frequency range. The axially tuned relativistic magnetron can be used in high power microwave systems with compactstructure and adjustable frequency.

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 relates to the technical field of high-power microwave, in particular to a permanent magnet magnetic circuit system for relativistic magnetron. The magnetic circuit system comprises an anode cylinder (1), an external magnetic circuit and an internal magnetic circuit. The outer magnetic circuit comprises two radially oriented permanent rings (2) and a yoke (3) connecting the two radially oriented permanent rings (2), and the inner magnetic circuit comprises two magnetic collecting pole shoes (4). The outer magnetic circuit is located outside the anode cylinder (1) and the inner magnetic circuit is located inside the anode cylinder (1). The structure of the external magnetic circuit and the internal magnetic circuit designed by the invention can effectively reduce the leakage magnetic field and improve the uniformity of the axial magnetic field in the working area of the relativistic magnetron. The invention can effectively reduce the overall weight of the magnetic circuitsystem. The permanent magnet magnetic circuit system of the invention can stably provide the relativistic magnetron with good uniformity of the working magnetic field for a long time, and can satisfythe high-power microwave output when the relativistic magnetron is working.

The invention discloses a mixed excitation system of a full-chamber extraction relativistic magnetron. The mixed excitation system comprises an anode outer cylinder and a cathode which is arranged in the anode outer cylinder. The cathode and the anode outer cylinder are coaxially arranged. An anode block is arranged between the cathode and the anode outer cylinder. A beam interaction area is arranged between the cathode and the anode block. An magnetic field coil sleeves the external surface of the anode outer cylinder. The mixed excitation system comprises a permanent magnet which is arranged between the anode outer cylinder and the cathode. According to the mixed excitation system, the permanent magnet is embedded into the magnetron, thereby sufficiently utilizing the inner space of the magnetron. The embedded permanent magnet effectively improves magnetic field at the end of the magnetic field coil. Through use of the embedded permanent magnet and the magnetic field coil, thereby realizing uniform distribution of the magnetic field in the interaction area, and furthermore realizing relatively low power consumption of the whole mixed excitation system of the full-chamber extraction relativistic magnetron.

The invention discloses a relativistic magnetron for a multi-antenna coupling output structure, and the relativistic magnetron comprises a cathode, an anode outer bushing, and an anode block which is disposed in the anode outer bushing. The cathode is disposed in the anode outer bushing in a coaxial manner. The anode block is disposed between the cathode and the anode outer bushing, and is connected with the inner wall of the anode outer bushing. The interior of the anode outer bushing is provided with a coupling antenna, wherein one end of the coupling antenna is connected with the anode block, and the other end of the coupling antenna is suspended. The coupling antenna is axially parallel to the anode outer bushing. Because a method for placing the coupling antenna inside is employed, the whole output structure extends in the axial direction of the cathode and anode and the lateral size of a system is just determined by the cathode and anode of a microwave tube, the structure is more compact. Moreover, the output structure cannot additionally increase the lateral size of the microwave tube, thereby facilitating the miniature design of an external magnetic field generation system. In addition, the output mode of the relativistic magnetron can be change according to the needs.

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 relates to a relativistic magnetron with tunable multi-antenna axial output, and belongs to the field of high power microwave technology, which includes an anode outer barrel, an anodeblock, a cathode and a tuning assembly; and the anode block includes a plurality of fan-shaped blades and a plurality of reentrant resonant cavities; the tuning assembly includes a tuning disk, a tuning screw and a plurality of movable nose cones; the head end of the movable nose cone is connected with an adjusting disc, the end of which is embedded in the re-entrant cavity; A fixed nose cone is arranged inside the reentrant resonant cavity, a gap is left between the fixed nose cone and the end of the movable nose cone to form a nose cone gap, the tuning screw pushes the adjusting disk to slide to change the axial length of the nose cone gap, The invention fully utilizes the internal space of the magnetron, does not increase the transverse size of the system and the magnet space, improvesthe lightness and miniaturization level of the system, can maintain high conversion efficiency in a wide tuning frequency range, and is suitable for a compact structure and frequency adjustable axialoutput high-power microwave system.

The invention discloses an axial cascade relativistic magnetron based on frequency locking and phase locking of a full-cavity coupling structure, and belongs to the technical field of microwaves. The magnetron comprises a plurality of high-frequency systems which have the same structure and are axially cascaded; an annular columnar isolation structure is arranged between the adjacent high-frequency systems; a full-cavity coupling structure shell is arranged on the outer side of the anode shell; an annular columnar cavity between the full-cavity coupling structure shell and the anode shell is divided into four fan-shaped waveguide cavities with the same size through four fan-shaped insertion pieces; linear transition structures are arranged at two ends of the fan-shaped waveguide cavity, and the other ends of the linear transition structures are connected with the rectangular waveguide; energy in the resonant cavity is coupled to the four fan-shaped waveguide cavities through the coupling gaps and finally output from the eight rectangular waveguides. Electromagnetic fields in the adjacent high-frequency system resonant cavities are coupled through the full-cavity coupling structures, and the cascade phase locking effect is enhanced; and through full-cavity extraction and multi-port axial output, the radial space compactness is improved, and the mode purity and the working stability are also improved.

The invention belongs to the technical field of high-power microwaves. The invention provides a C-band full-cavity extraction relativistic magnetron. The C-band full-cavity extraction relativistic magnetron comprises an input inner conductor (1), an input outer conductor (2), a cathode (3), an anode (4), an output outer conductor (5), a first output inner conductor (6) and a second output inner conductor (7). The C-band full-cavity extraction relativistic magnetron provided by the invention has the advantages of compact structure, suitability for permanent magnet packaging, easiness in mode conversion and the like, and meanwhile, high-power and high-efficiency output of C-band microwaves can be realized.

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 provides a kind of microwave sulfur lamp, includes the wave-guide that is consisted of cover board, wave-guide cavity, allocation block, the said allocation block is designed and formed wholly at one side end of the cover board of the inner cavity that forms the wave-guide. The effect of the invention is to use the structure to make the microwave sulfur lamp, since the original cover board and the triangular column shape allocation block are made in a whole, which saves the process of using screw to make the connection, and conveniently it can assemble into a wave-guide cavity, which can not only improve the production efficiency, but also is beneficial to protect the relativistic magnetron. Normally it uses the method of compensation reflection to eliminate the microwave reflection, its reflection elimination ability does mainly depends on its volume. Similarly, the effect of installing it at the end of the wave-guide after changing it into a triangle is almost same as the one of installing it at the side. It produces reserve reflection at the end of the wave-guide and then eliminates the microwave it is reflected back from the resonant cavity. It can produce the allocation block and the wave-guide cover as a whole to solve the problem of installation. Therefore the end section of the inner cover board of the wave-guide is chosen as the improved allocation block position.