38 results about "Coaxial waveguides" patented technology

Power-combining devices and more particularly spatial power-combining and related structural arrangements are disclosed. Such structural arrangements involve mechanical connections between center waveguide sections and input and / or output coaxial waveguide sections that provide scalable structures for different operating frequency bands, improved mechanical connections, and / or improved assembly. Exemplary structural arrangements include structures that extend through center waveguide sections and into input and / or output coaxial waveguide sections, integrated mechanical structures within the center waveguide section, compression fit arrangements, dielectric inserts arranged within channels of coaxial waveguide sections, and / or various combinations thereof.

A system for efficiently generating or originating a tailored electromagnetic (EM) wave having a lower velocity than the speed of electromagnetic waves in free space includes a coaxial waveguide which extends linearly and a sinewave current generator. The coaxial waveguide includes a tubular outer body and a tailored emitting antenna disposed coaxially within the tubular outer body. The tubular outer body is formed of a first conductive material and defines a space therein which may be maintained as vacuum. The tailored emitting antenna is constructed physically and electrically by at least three phase-shifted sub-antennas connected in series, each of the sub-antennas being formed of a second conductive material which is less conductive than the first conductive material. The sinewave current generator generates multiple phase-shifted sinewave currents which are respectively input to the sub-antennas.

The present invention relates to a mode-extracting device (500) for an electromagnetic signal comprising, from upstream to downstream: - a first orthomode junction (1) comprising: - a central core (121) and - a first coaxial waveguide (120) extending to a coaxial transition zone (11); - a second coaxial waveguide (140) extending from the coaxial transition zone (11) to a downstream end (15); - four first output ports (14); - a waveguide (150) extending from the end (15); - four first branches (2a); - a second junction (3, 4) comprising an output waveguide (31, 41), a second output port (311, 411), and four second input ports (33, 43), each connected orthogonally to one of the four second branches (2b) and to the waveguide output waves (31, 41). Figure for the abstract: Fig. 2

The application discloses a compact high-power multilayer coaxial waveguide power divider, and belongs to the field of high-power mode power distribution. The power divider comprises an upper layer coaxial radial power division structure, a lower layer coaxial radial power division structure and a variable inner diameter coaxial line structure. The upper layer coaxial radial power division structure comprises n upper layer output ports, the lower layer coaxial radial power division structure comprises n lower layer output ports, and the variable inner diameter coaxial line structure is used for introducing part of power of an upper layer coaxial input port input signal into a lower layer coaxial line part, and the remaining power enters an upper layer radial line part. Signals entering the upper layer radial line part are equally divided into n paths of output, and signals entering the lower layer coaxial line part are equally divided into n paths of output through a lower layer radial line part. The application can break through the restriction of the number of radial power division, introduce more power division paths in a limited radial radius, and has the advantages of low loss, high power capacity and more compact structure compared with a single layer radial power division system under the premise of the same number of power division.

The utility model discloses a mountain landslide early warning device based on waveguide deformation relates to geological disaster monitoring field, including microwave source, circulator, waveguide, lossy medium, waveguide load, power detection module and signal processing module, the output of microwave source is connected with circulator's Port1 port through radio frequency cable, and Port2 port of circulator is connected with the input of waveguide through coaxial waveguide adapter, and Port3 port of circulator is connected with power detection module through radio frequency cable, the inside chamber end of waveguide is filled with lossy medium, and the outer port of waveguide is fixedly connected with waveguide load, the input of waveguide load is in close contact with lossy medium, and the output of power detection module is connected with the input of signal processing module through AD acquisition circuit. The utility model overcomes the deficiency of prior art, can realize the sensitive capture and accurate evaluation to mountain tiny slip. Thus effectively prevent the occurrence of landslide disaster.

The invention discloses a high-power-capacity power divider based on a mixed mode, and belongs to a power distribution / synthesis technology in the technical field of high-power microwaves. The objective of the invention is to solve the problems of insufficient power capacity and coaxial inner conductor end surface electric field concentration caused by small cross section size when an existing power divider is applied to high frequency. The power divider integrates circular waveguide TM0n mixed mode excitation, conversion from a mixed mode to a coaxial waveguide TEM mode and an inner conductor end face strong field control technology, and comprises an input circular waveguide, inclined plane transition, a large over-mode ratio circular waveguide, a coaxial waveguide, a radial line and a rectangular waveguide, and a groove is formed in the inner conductor end face of the coaxial waveguide. While the waveguide section is increased to improve the power capacity of the main body structure, the end surface electric field peak value is effectively inhibited, and the system power capacity is improved. The invention is mainly applied to a microwave system requiring high power distribution or synthesis, and has the advantages of high power capacity, low surface electric field, high conversion efficiency and wide working bandwidth.

The invention discloses a terminating type coaxial waveguide adapter and an optimization method thereof.The terminating type coaxial waveguide adapter comprises a coaxial connector, a waveguide adapter lower cavity and a waveguide adapter upper cavity, the coaxial connector is provided with an inner conductor, the waveguide adapter lower cavity is provided with a primary waveguide cavity, a metal diaphragm and a standard rectangular waveguide which are sequentially arranged, and the waveguide adapter upper cavity is provided with an outer conductor. The inner conductor extends into the primary waveguide cavity for a set length along the center of the wide side of the primary waveguide, and the center of the inner conductor keeps a set distance from the short circuit surface of the waveguide cavity; the metal diaphragm is integrally formed in the lower cavity of the waveguide adapter and is used for realizing impedance matching between the primary waveguide and the standard rectangular waveguide and deflecting a signal by 90 degrees along the transmission direction of the waveguide; the upper cavity of the waveguide adapter is in contact with the lower cavity of the waveguide adapter in a plane crimping mode, so that the structure of the waveguide is closed. According to the invention, the structure complexity, the assembly difficulty and the production cost are greatly reduced while the properties of large bandwidth and low loss of the adapter are maintained.

The utility model relates to the technical field of electromagnetic wave conduction, in particular to a coaxial-waveguide power synthesis device, which comprises a waveguide tube, an inner conductor and a coaxial, the waveguide tube comprises an open end and a closed end, the coaxial penetrates through the closed end and is connected with the inner conductor, the coaxial-waveguide power synthesis device further comprises a short-circuit block, one end of the short-circuit block is connected with the closed end, and the other end of the short-circuit block is connected with the inner conductor. One end of the waveguide tube is connected with the closed end, the other end of the waveguide tube is connected with the inner conductor, the inner conductor, the closed end and the inner wall of the waveguide tube are arranged at intervals, and the coaxial-waveguide power synthesis device can transmit heat of the inner conductor to the waveguide tube so as to dissipate the heat, reduce reflection and improve electromagnetic performance.

The utility model discloses a kind of straight-through coaxial waveguide radial power combiners, including outer cavity, inner cavity, cover plate, probe, medium, output end connector, input end connector, output connector mounting screw, cover plate mounting screw, input connector mounting screw, the probe is set in the bottom of inner cavity, the outer cavity, inner cavity, cover plate are sequentially connected from top to bottom, medium is sleeved on probe, output end connector is set above outer cavity by output connector mounting screw, the input end connector is set in the bottom of cover plate by input connector mounting screw.The utility model input connector and output connector are on the line of direction opposite in length direction, save the space of chassis in height direction, make chassis height lower;Save the space of chassis in width direction, make power amplifier module, power module better realize layout.

The invention discloses a compact broadband circular waveguide TM01 mode bending structure, and aims to solve the technical bottleneck that an existing circular waveguide TM01 mode bending structure is difficult to consider the aspects of bandwidth, structural compactness and power capacity at the same time. The antenna is composed of two circular waveguide TM01 mode power dividers, two E-plane U-shaped folded waveguide arrays and two E-plane rectangular bent waveguide arrays. The coaxial waveguide TEM mode and the multi-path rectangular waveguide TE10 mode are adopted as the middle transition mode of the antenna, and the problem of mode competition in a traditional bending structure is effectively solved. Meanwhile, by utilizing an E-plane U-shaped folded waveguide phase compensation technology, the length of each rectangular waveguide transmission path between the two circular waveguide TM01 mode power dividers is ensured to be consistent, the relative working bandwidth of which the transmission efficiency of a bent structure is greater than 95% is widened to be more than 40%, the power capacity is improved to the GW magnitude, and the distance between input / output ports is shortened to be within 5 times of the central wavelength.

The application discloses a kind of hole microwave irradiation auxiliary rock breaking method and device, comprising: S1, the rotating center of the cutting head end of heading machine is set with a hole;S2, a rack is arranged in the main shaft of heading machine, drill pipe and coaxial waveguide are placed side by side in the rack, wherein drill pipe and coaxial waveguide can rotate with main shaft;S3, lifting component and telescopic component are arranged in the main shaft, lifting component is used to drive rack to move in the main shaft along the radial direction of main shaft, so that drill pipe and coaxial waveguide are aligned with hole respectively, telescopic component is used to push the end of drill pipe or coaxial waveguide aligned with hole to extend out of cutting head;Wherein, multiple openings are set on the lateral side of coaxial waveguide.The application integrates "microwave cracking" into heading machine, the device is highly integrated, realizes drilling-microwave-heading integration, and the efficiency of heading is high;Unlike surface microwave cracking, hole microwave cracking has greater depth, longer distance for assisting rock breaking, and higher energy utilization rate.

Embodiments described herein relate to an apparatus that includes a microwave power generator, and a rectangular waveguide coupled to the microwave power generator. In an embodiment, the apparatus may also include an impedance tuner that is coupled to the rectangular waveguide, and a coaxial waveguide that is coupled to the rectangular waveguide. In an embodiment, the coaxial waveguide includes a conductive pin with a first end and a second end. In an embodiment, the apparatus further includes a circular waveguide cavity around the second end of the conductive pin, and a slotted antenna in the circular waveguide cavity.

The invention discloses a multi-feed-source coaxial-waveguide composite resonance microwave heating device and a control method, the multi-feed-source coaxial-waveguide composite resonance microwave heating device comprises a waveguide cavity and a plurality of coaxial coupling structures, the top surface of the waveguide cavity is open, and the plurality of coaxial coupling structures are integrated in the cavity wall of the waveguide cavity. Each coaxial coupling structure comprises a coaxial port and a coaxial coupling helix which are connected with each other, the coaxial port serves as an input end of the feed source, and a microwave signal is input into the waveguide cavity through the coaxial port and the coaxial coupling helix in sequence to heat an object to be heated in the waveguide cavity. A coaxial and waveguide composite resonance mode is constructed, impedance matching and heating uniformity are further optimized in combination with gradual change spiral parameter design and a multi-source heating control method, and the method is suitable for the field of industrial heating and precise material processing with extremely high temperature uniformity requirements.

The invention discloses an 0-shaped slot reconfigurable intelligent metasurface phased-array antenna which comprises a patch layer, a first dielectric layer, a first grounding layer, a second dielectric layer, a second grounding layer, a third dielectric layer, a feed layer, a fourth dielectric layer and a third grounding layer from top to bottom in sequence. The patch layer comprises a plurality of radiation patches arranged in an array and a feed network connected with the radiation patches, the feed layer is provided with a strip-shaped feed line and is connected with the patch layer through metalized via holes, and the third grounding layer comprises a grounding copper layer and two bias lines isolated from the grounding copper layer. The two bias lines are connected with the patch layer through metalized via holes; according to the utility model, the radiation patch adopts an O-shaped slotted patch, the feed mode adopts coaxial waveguide feed, the antenna is easy to install, the bandwidth can cover a mobile 5.8 GHz communication frequency band of 5.725 GHz-5. 85 GHz, and the antenna has the advantages of light weight, low profile, low power consumption, easy deployment, low cost and the like.

This invention relates to the field of antenna technology and discloses an integrated transceiver device for an ultra-wideband beam antenna and radome, comprising a coaxial connector, a dual-ridge waveguide, a coaxial-to-waveguide converter, a metal cap, a parasitic ridge horn section, a radome, and an integrated fixing frame. The dual-ridge waveguide is connected to the parasitic ridge horn section, and the coaxial connector is connected to the dual-ridge waveguide via the coaxial-to-waveguide converter. The metal cap seals the bottom of the dual-ridge waveguide, and the radome covers the radiating aperture of the parasitic ridge horn section and is fixed by the integrated fixing frame. The dual-ridge waveguide extends the main mode cutoff wavelength through the parasitic ridges, expanding the single-mode transmission bandwidth and achieving impedance matching with VSWR≤2 in the 5GHz~18GHz frequency band. Through an innovative integrated design, this invention achieves signal coverage across multiple frequency bands without significantly increasing the size, meeting the requirements of modern military communication and guidance systems for high-speed data transmission, strong anti-interference capabilities, and high confidentiality with excellent impedance and radiation characteristics.

An antenna for omnidirectional coverage and directional beam forming includes a multimode biconical waveguide with a first conical structure having a first base and a first apex, a second conical structure having a second base and a second apex, the first apex facing the second apex, and a radiation aperture. There is a coaxial interface between the first conical structure and the second conical structure that includes a coaxial waveguide to direct electromagnetic (EM) energy into the radiation aperture. An active electronic phased array (ASEA) included with the antenna controls independent sources of EM wave energy that excite multiple modes of the multimode biconical waveguide and provide omnidirectional radiation and directional beam steering.

The application discloses a leaky circularly polarized waveguide, which comprises, from back to front, a closed short-circuit end, a coaxial waveguide, a matching unit and a feeding unit; the coaxial waveguide comprises a first inner conductor, a first insulating layer and a first outer conductor which are sequentially arranged from inside to outside; the first insulating layer is wrapped outside the first inner conductor, and the first outer conductor is wrapped outside the first insulating layer; along the signal transmission direction, a slot array is arranged in a matrix on the outer surface of the first outer conductor; the slot array is composed of a plurality of groups of slot array elements arranged along the length direction of the outer surface of the first outer conductor; each group of slot array elements is a circular ring structure formed by a plurality of slot units arranged in a circle; each slot unit is composed of a first slot and a second slot arranged in pairs, and the first slot and the second slot are arranged in a non-contacting orthogonal mode. The leaky circularly polarized waveguide has the advantages of enhancing signal coverage strength and capacity.

According to one embodiment, an high-frequency input coupler installed between a waveguide and an acceleration cavity to input high-frequency waves from the waveguide to the acceleration cavity, a coaxial waveguide conversion unit includes a high-frequency transmission window structure connection unit that connects the high-frequency transmission window structure and an inner conductor connection unit that connects an inner conductor which includes an inner conductor support on a side of the inner conductor connection unit, and the high-frequency input coupler includes an electrically connectable and deformable buffer between the inner conductor support and the inner conductor connection unit.

Disclosed is a feedhorn. The feedhorn provided in a multi-band antenna using a coaxial waveguide comprises: the coaxial waveguide including a first waveguide that is provided on one side of a reflector and allows a first band signal to pass therethrough and a second waveguide that shares the same axis with the first waveguide, has a larger diameter than the first waveguide, and allows a second band signal to pass therethrough; and a dielectric that is provided between the coaxial waveguide and a sub-reflector on one side of the coaxial waveguide and protrudes radially with respect to the axis of the coaxial waveguide.

This invention relates to a power combiner that converts a suspended band to a coaxial cable and then to a waveguide, comprising a housing, a copper strip conductor, and a copper rod conductor. The housing contains a copper strip cavity, a coaxial cavity, and a waveguide cavity. The copper strip conductor is suspended within the copper strip cavity by insulating support pillars and has at least two input copper strip sections, each radially distributed at a 360° / X-degree angle. The copper rod conductor includes an upper and lower section with different diameters. The upper end of the upper section extends into the waveguide cavity, and the lower section is connected to the copper strip conductor, with its lower end connected to the bottom of the housing for grounding. The diameter difference between the upper and lower sections achieves the transformation from low impedance to the impedance required for the waveguide. This invention achieves an orderly connection of three transmission modes—suspended band, coaxial, and waveguide—within the same housing, and each section is adapted to the power level it carries. The grounding heat conduction path of the lower section of the copper rod, after a quarter-wavelength transformation, exhibits high impedance, does not interfere with signal transmission, and solves the problem of heat accumulation under high power without the need for additional heat dissipation structures.

A coaxial waveguide-based geotechnical multi-point deformation sensor and an adjustable gauge-length measurement method are provided. The coaxial waveguide-based geotechnical multi-point deformation sensor includes an outer conductor, open at opposite ends and hollow inside; magnetic metal support frames, inside the outer conductor, sequentially spaced along an axial direction of the outer conductor and each having a through-hole; an inner conductor inside the outer conductor and passing through each through-hole; and annular magnets, surrounding the outer conductor and configured to move along it, driving the nearest magnetic metal support frame to follow its movement. Each magnetic metal support frame acts as a reflection point. By reconstructing the interference spectra of any two reflection points, a gauge-length can exist between any two of the magnetic metal support frames. By collecting the changes in the interference spectrum signals of different gauge-lengths, deformation of geotechnical layers corresponding to the gauge-length(s) can be calculated, thus allowing the deformation of any geotechnical layer to be determined.

The utility model discloses a kind of diamond growth with MPCVD device, belong to microwave plasma chemical vapor deposition technical field, including mode converter, the bottom of the mode converter is provided with support mechanism, the top of mode converter is provided with coaxial waveguide, the top of coaxial waveguide is provided with bottom plate, the outside of bottom plate is provided with dust cover mechanism, the top of bottom plate is fixedly connected with support ring, the top of support ring is provided with upper cover, the utility model is provided with support mechanism, triangular support block can be fixed in the L-shaped plate below mode converter by slot, and triangular support block has two, can be well supported to entire device, the perforated plate and plugboard of multiple devices are inserted, multiple mode converters can be connected into a row, when plugboard is inserted into perforated plate, will push plug rod to move up, while spring pulls plug rod, let plug rod insert into round hole, fix plugboard and perforated plate, by triangular support block, multiple devices can be supported and connected, can prevent device to dump.

The application discloses a coaxial-waveguide composite resonance microwave heating device with multiple feed sources and a control method, which comprises a waveguide cavity and multiple coaxial coupling structures. The top surface of the waveguide cavity is open. The multiple coaxial coupling structures are integrated in the cavity wall of the waveguide cavity. Each coaxial coupling structure comprises a coaxial port and a coaxial coupling spiral which are connected with each other. The coaxial port serves as an input end of the feed source. Microwave signals are sequentially input into the waveguide cavity through the coaxial port and the coaxial coupling spiral. The object to be heated in the waveguide cavity is heated. The embedded spiral structure is arranged to construct a coaxial-waveguide composite resonance mode. In combination with a gradually changing spiral parameter design and a multiple-source heating control method, impedance matching and heating uniformity are further optimized. The application is suitable for industrial heating and precise material processing fields with extremely high requirements on temperature uniformity.

Power-combining devices and, more particularly, antenna structures for spatial power-combining devices are disclosed. Spatial power-combining devices include amplifier assemblies with amplifiers and antenna structures supported by body structures. Body structures may include inner surfaces that are closer to a center axis of the spatial power-combining device where the inner surfaces have peripheral edges that are inset from remainders of the body structures. Antenna structures are disclosed that are arranged within inset portions such that the antenna structures are bounded on one end by the body structures. When assembled, a portion of a coaxial waveguide section that engages with the amplifier assemblies may bound opposing ends of the antenna structures. By not having body structures bound both ends of antenna structures, amplifier assembly design may be improved to allow smaller sizes for higher frequency operation along with improved manufacturability.

An antenna for omnidirectional coverage and directional beam forming includes a multimode biconical waveguide with a first conical structure having a first base and a first apex, a second conical structure having a second base and a second apex, the first apex facing the second apex, and a radiation aperture. There is a coaxial interface between the first conical structure and the second conical structure that includes a coaxial waveguide to direct electromagnetic (EM) energy into the radiation aperture. An active electronic phased array (ASEA) included with the antenna controls independent sources of EM wave energy that excite multiple modes of the multimode biconical waveguide and provide omnidirectional radiation and directional beam steering.

The invention discloses an axial energy extraction structure of a broadband super-radiation backward wave tube, and belongs to the field of high-power microwave sources. The energy extraction structure comprises a coaxial TM0n-TEM mixed mode converter, a mixed mode phase shifter and a supporting rod loading coaxial waveguide which are connected in sequence. When a TM01 wave enters the coaxial TM0n-TEM mixed mode converter, part of a TM01 mode is converted into a TEM mode, and the TM01 mode and the TEM mode are equal in amplitude and phase. In the hybrid mode phase shifter, waves of two modes can generate a phase difference, and equal-amplitude phase reversal of a TM01 mode and a TEM mode is achieved. When the supporting rod loads the coaxial waveguide, the TM01 mode and the TEM mode interfere with each other and are transmitted in the TE11 mode, and after passing through the area where the supporting rod is located, the electromagnetic waves are converted into the TM01 and TEM mixed mode again to be output. The axial energy extraction structure has the advantages of being simple in supporting structure, large in power capacity and high in energy extraction efficiency.

The invention discloses a frequency and bandwidth reconfigurable antenna for cognitive radio equipment. The frequency and bandwidth reconfigurable antenna comprises a coaxial waveguide feeder line, a metal floor, a monopole antenna and a metal top cap from bottom to top, the octagonal prism surface is formed by concentrically surrounding the monopole antenna by an artificial impedance surface loaded with varactors, two artificial impedance surfaces loaded with PIN tubes, four metal rings and a dielectric substrate. One end of the monopole antenna is connected with the metal top cap, the other end of the monopole antenna is connected with an inner conductor of the coaxial waveguide feeder, and an outer conductor of the coaxial waveguide feeder is connected with the metal floor; by controlling the voltage of the varactors and the PIN tubes in the artificial impedance surfaces loaded with the varactors and the artificial impedance surfaces loaded with the PIN tubes, the impedance characteristics of the artificial impedance surfaces are changed, and the working frequency and the bandwidth of the antenna are reconfigurable. The monopole antenna with the artificial impedance surface has a frequency and bandwidth reconfigurable function, is compact in structure and is very suitable for cognitive radio equipment.

The application discloses a grating-loaded compact circular waveguide TM01-TE01 mode converter and belongs to the technical field of microwave waveguides. The structure comprises coaxial and bottom-to-top circular waveguide input sections, first transition sections, coaxial waveguide transition sections, reflective grating mode conversion sections and circular waveguide output sections; wherein the reflective grating mode conversion section comprises a radial line structure and a mode conversion transition section; the inner conductor of the radial line structure comprises a first second-order circular truncated cone, a transition cylinder and a second second-order circular truncated cone; the inner wall of the outer conductor of the radial line structure is provided with a plurality of curved surface metal reflective grating grooves which are uniformly arranged in the circumferential direction. The application combines the radial line theory, the reflective grating theory and the waveguide mode transmission theory, and has the advantages of compact structure, coaxial input and output ports, high conversion efficiency, large power capacity, easy processing and the like.

The invention provides a coaxial spark switch for a high-power pulse power system, which consists of three parts, namely a coaxial inner conductor, a coaxial outer conductor and a concave dielectric block, and realizes the function of efficiently transmitting microwave signals by reasonably designing the sizes of a transition section of the coaxial inner conductor and the concave dielectric block. Compared with a commonly used coaxial spark switch structure in which the medium is convex and the radius of the inner conductor is not changed, the inner concave medium block and the coaxial inner conductor transition section are adopted at the air-medium interface as a transition structure, and the impedance mutation of the air-medium interface in the coaxial waveguide is reduced, so that the coaxial spark switch structure is improved. Therefore, the signal reflection of the device is reduced. The device is suitable for a high-power pulse power system, and has the advantages of being easy to process and convenient to install.

The invention relates to the technical field of GIS bus accidental partial discharge signal propagation law analysis, in particular to a GIS bus accidental partial discharge signal propagation law analysis method, which comprises the following steps: S1, establishing a GIS bus simulation model by using adaptive modeling software, simplifying a cavity structure and only reserving a coaxial waveguide structure and an insulator; s2, simulating a field operation environment based on a simulation device, setting an insulation defect in the model, setting an excitation at a position 240mm away from the left end and a position 960mm away from the excitation by an insulator, and obtaining an ultrahigh-frequency accidental partial discharge signal; and S3, analyzing a signal propagation rule. According to the method, the FDTD algorithm and the PML absorption boundary are adopted, the grid is divided into 6mm * 6mm * 6mm, the characteristics that the signal near source attenuation is obvious, the attenuation is reduced along with the distance and the insulator is further attenuated are determined, the method has the advantages of being efficient in modeling, accurate in simulation and clear in rule, the positioning precision of the accidental partial discharge signal can be improved, and support is provided for equipment maintenance.