123 results about "Waveguide flange" patented technology

The invention discloses a low-passive intermodulation waveguide flange conversion device. By constructing a double-sided periodic metal unit array and in combination with a mechanical support structure, a noncontact transitional connection with a double-sided air gap is formed between common waveguide flange surfaces. The structural form, the size and the air gap size of the periodic metal unit are determined through specific steps, a suitable electromagnetic band gap characteristic is obtained, and it is ensured that electromagnetic waves cannot leak from the air gap. Thus, while the normal transmission of the electromagnetic waves is not affected, the internal noncontact effect of the waveguide transitional connection is achieved, the metal contact nonlinearity of the traditional waveguide flange connection is greatly eliminated, and low-passive intermodulation performance is achieved. The conversion device of the invention can realize low-passive intermodulation transitional conversion without changing the original waveguide flange structure, and has good universality. In addition, the device provided by the invention has a wideband working characteristic, can completely cover the corresponding waveguide working bandwidth, and can be applied to various high-power low-intermodulation microwave components and test systems.

The invention discloses a waveguide filter, and relates to the field of electromagnetic field and microwave technologies. The waveguide filter comprises a first waveguide flange plate, a second waveguide flange plate, a first waveguide, a second waveguide and four hemispherical resonators, wherein the cavity wall of each hemispherical resonator is provided with a through rectangular groove which is used for suppressing a high-order resonance mode of electromagnetic waves in the hemispherical resonator so as to expand the spurious-free stopband bandwidth of the waveguide filter. The invention further discloses a manufacturing method of the waveguide filter. The structure of the waveguide filter is integrally printed by a selective laser sintering 3-D printer through adopting a metal powdermaterial, does not need assembly and debugging while achieving accurate processing and effectively improves the manufacturing efficiency.

The invention discloses a low passive intermodulation waveguide flange and a design method thereof. Through designing periodic metal convex bodies on conventional flange surfaces, a non-contact structure is formed by arranging the metal convex bodies with another flange surface at a certain distance; through designing and calculating the parameters such as the size of the metal convex bodies and the distance between flanges, appropriate electromagnetic forbidden band characteristics are obtained; therefore, the suppression of electromagnetic wave leakage in flange clearance is realized, and the waveguide flange which is not contacted internally is formed combined with the mechanical connection structure. According to the passive intermodulation waveguide flange disclosed by the invention,through constructing the non-contact electromagnetic band-gap structure, the non-contact between flanges is realized without affecting the transmission of electromagnetic waves between waveguides, thecontact nonlinearity is eliminated, the passive intermodulation effect is effectively suppressed, and the requirements for materials, electroplating, machining and assembly technology are reduced. Meanwhile, the passive intermodulation waveguide flange disclosed by the invention has a wide working bandwidth, which can completely cover the corresponding waveguide working bandwidth, and can be applied to various high-power low intermodulation microwave components and test systems.

The present invention pertains to a resonant cavity system, more specifically, a resonant system for measuring the dielectric constant of a sample and its method of use. The system and method provide for holding sample materials, which can be in solid, liquid, or powder form, and for reducing the size of the requisite cavity for measurement. The construction incorporates waveguide flange connectors to seal the electromagnetic cavity, which facilitates the measurement of low-loss materials. The design for signal input enables the use of standard calibration techniques and measurement.

Provided is a waveguide feeder. The waveguide feeder includes: a probe aligned at a center of a waveguide aperture at a metal wiring layer of a semiconductor substrate to input and output an electric signal; and an open stub located at a contact surface of a waveguide flange on a ground surface of a semiconductor chip in order to form a ground path of the probe on a surface of the waveguide flange.

The invention discloses a broadband rectangular waveguide microstrip converter. The converter comprises a rectangular waveguide, a waveguide flange plate, a PCB four-layer plate and a substrate integrated waveguide, wherein the waveguide flange plate comprises four mounting holes for fixing the rectangular waveguide on the PCB four-layer plate, and the PCB four-layer plate comprises four layers ofmetal floors, three microwave dielectric substrates and a microstrip circuit; the first metal floor and the second metal floor are provided with windows of the same size, metal patches of different sizes are arranged in the windows respectively, the windows correspond to the rectangular waveguide openings in position, a circle of metallized through holes are formed in the peripheries of the windows, and the third metal floor is provided with two gaps of different sizes; The substrate integrated waveguide is located on the third microwave dielectric substrate and used for a transition part between the rectangular waveguide and microstrip circuit signal transmission, and the designed rectangular waveguide microstrip converter has the advantages of being wide in frequency band and small in loss and has wide application prospects in the fields of millimeter wave radars and communication.

A waveguide ring flange, a flexible waveguide assembly containing the waveguide ring flange and an assembly method of the flexible waveguide assembly relate to the technical field of waveguide transmission lines and aim at solving the problem that the heat radiation cannot be realized by a traditional flexible waveguide assembly due to the adoption of external cooling equipment. The waveguide ring flange comprises a first ring flange and a second ring flange, wherein a waveguide tube connecting surface is arranged on the inner wall of the first ring flange; the second ring flange consists of a waveguide tube fixing part and an outer jacket which are integrated and communicated with each other; the waveguide tube fixing part is provided with a groove matched with the first ring flange; and water injecting ports of which the output ends are communicated with an inner cavity of the fixing part are formed in the side wall of the fixing part. The flexible waveguide assembly comprises a waveguide tube, the outer jacket and two waveguide ring flanges; two ends of the waveguide tube are respectively connected to the ring flanges; two ends of the outer jacket are respectively connected to the two ring flanges; and the waveguide tube, the outer jacket and two water injecting ports form a cooling water channel. The assembly method comprises the steps of material falling, shaping, waveguide tube welding and outer jacket cold pressing. The waveguide ring flange, the flexible waveguide assembly containing the waveguide ring flange and the assembly method of the flexible waveguide tube assembly, disclosed by the invention, are mainly used in the fields of communication, satellite ground stations, microwave measurement and the like.

The invention discloses a multi-chip integrated E-band transmitting module which comprises an upper metal base and a lower metal base. A medium-frequency low-pass filter circuit, a local oscillator circuit and an up-conversion circuit are respectively disposed in a cavity formed by the upper metal base and the lower metal base. A standard SMA (shape memory alloy) connector is arranged at a medium-frequency input end. A local oscillator input end is in a standard waveguide flange structure. A radiofrequency output end is in a standard waveguide flange structure. Signal coupling between a waveguide and a microstrip circuit in the module is achieved through a transition structure, and a low-loss substrate circuit and functional gallium arsenide chips are electrically connected by gold wire bonding. The multi-chip integrated E-band transmitting module based on multi-chip integration technology has the advantages of compact structure, high integrity, low cost, high uniformity and convenience in large-scale manufacturing.

The invention discloses a microwave heating energy-feedback antenna and a manufacturing method thereof. The microwave heating energy-feedback antenna for connecting with a waveguide comprises a waveguide flange that is in connection with a port of the waveguide, and a resonance chamber integral in shape of a flat, wherein a layer of sealing mediums is filled into the resonance chamber body; a hole array for radiating microwave out of the resonance chamber is arranged on the wall of the resonance chamber, wherein the waveguide flange is placed on one corner of the resonance chamber; and a motivation angle between the waveguide and the resonance chamber is of 45 degrees. By the microwave heating energy-feedback antenna, the microwave can be transmitted at 45 degrees from the side to the flat shaped resonance chamber by the waveguide flange through the waveguide, and a TMmno mode standing wave is formed by the microwave in the layer of sealing mediums of the resonance chamber, and radiated from the hole array, as a result, the power output efficiency and the coupling efficiency of the microwave can be raised; the heating uniformity can be improved; and discharging can be restrained.

The invention provides a structure-integrated circular polarization feed source. Circular polarization signal radiation is achieved through a structure-integrated design. The structure-integrated circular polarization feed source comprises an input waveguide as an input port of a microwave signal and a standard rectangular waveguide flange plate, an impedance conversion segment, a circular polarization segment and a horn radiator, wherein the impedance conversion segment is used for connecting the input waveguide and a circular waveguide of the circular polarization segment; a circular polarizer and an input electric field form an angular relationship of 45 degrees, so that an input linear polarization field is converted into a circular polarization field; and the horn radiator is used for transmitting a circular polarization signal into an external space. Therefore, circular polarization radiation is achieved by using the structure-integrated circular polarization feed source provided by the invention; various parts are of the structure-integrated design; the processing technology is easy to achieve; the reliability is high; and the structure-integrated circular polarization feed source can be used for mass production of array antenna feed source units.

The invention relates to a substrate integrated type low passive inter-modulated waveguide flange gasket. A substrate integrated double-side period metal unit array is constructed, an external supporting structure is combined, and thus, a double-side transitional connection structure free of metal contact is formed between traditional waveguide flanges; the key structural size is determined via specific steps, an appropriate electromagnetic forbidden band characteristic is obtained, and it is ensured that the electromagnetic field is transmitted normally along the waveguide and is not leaked;and further metal side contact of traditional waveguide flange connection is replaced, the metal contact nonlinearity is eliminated greatly, and low passive inter-modulation performance is realized. The provided gasket structure can realize low passive inter-modulated transitional connection needless of changing the original waveguide flange structure, and the gasket is made small, thin, light andhighly flexible in a substrate integration manner, and can match the size of a standard waveguide flange surface within low-frequency and high-frequency ranges. Low cost, versatility and batch production can be realized, and the gasket can be applied to different large power microwave parts, systems and test systems with low passive inter-modulation demands.

The invention discloses a high power microwave radial line mode conversion slot antenna. The problems of being loose, limited power capacity and the like of a high power microwave antenna are solved.The antenna provided by the invention consists of a coaxial waveguide, a radial line leaky waveguide, a flange plate and a mode conversion lens. The radial line leaky waveguide is composed of a radialline bottom plate, a radial line middle plate, a short circuit cylinder, a slot array actinal surface and a waveguide wall. The slots of the slot array actinal surface are capsule-shaped slots whichare uniformly arranged in the circumferential direction. An annular protrusion step is added between adjacent slots to form a radiation branch. The mode conversion lens is composed of a first matchinglayer, a metal disc, a filling medium and a second matching layer. The metal disc is formed by combining mode conversion units arranged in the shape of a honeycomb. The mode conversion units are formed by punching inside a prismoid. According to the invention, the high power microwave radial line mode conversion slot antenna has the advantages of compact structure and high power capacity and gain; and the problem that the high power microwave antenna has limited power capacity and is difficultly used in a high frequency band is solved.