53 results about "Hollow waveguide" patented technology

A microwave filter arrangement (100) for quantum computing applications, the filter arrangement (100) comprising a first port (113) and a second port (114). The microwave filter arrangement (100) comprises a main waveguiding structure (110) arranged between the first (113) and second (114) port, where the main waveguiding structure (110) comprises an inner conductor (111) having a circular cross-section that is surrounded by a hollow outer conductor (112) having a rectangular cross-section with two opposed long sides and two opposed short sides. The waveguiding structure (110) comprises a plurality of hollow waveguides (115) extending away from one or both of the long sides of the outer conductor, the hollow waveguides (115) comprising a dielectric material (122) and being terminated by an electromagnetically absorptive material (124).

An optical hollow waveguide component (25), particularly for homogenizing EUV light, comprises two support elements (26) and two insert elements (28), which are particularly plate-shaped. The insert elements (28) are inserted between the support elements (26) such that a hollow waveguide (11) is formed between the insert elements (28). The hollow waveguide component (25) is particularly suitable for use in an illumination optic for a mask inspection system (1) for use with EUV illumination light. An optical system with such an illumination optic and a mask inspection system with the optical system are also described.

Network elements and methods of use, including a transmitter comprising a client-side input, signal and clock conditioning blocks, a modulation block, and antennas. The client-side input receives baseband signals having client data. The signal conditioning block adjusts signal characteristics of the baseband signals to generate intermediate signals. The clock conditioning block receives a first clock signal having a first clock frequency and adjusts signal characteristics of the first clock signal to generate a second clock signal having a harmonic frequency of the first clock frequency. The modulation block modulates the intermediate signals onto the second clock signal to generate antenna feed signals. The antennas generate radiated signals based on the antenna feed signals and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection with a transmission frequency in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz).

A compact feed system (600) is provided which comprises an orthomode transducer or junction (400) and a waveguide H-plane directional coupler (100). The waveguide H-plane directional coupler may comprise two hollow waveguide sections (110, 120) and a coupling section (130) arranged in between the two hollow waveguide sections for coupling a signal from one hollow waveguide section to another hollow waveguide section. In a transverse cross-section of the waveguide H-plane directional coupler, the hollow waveguide sections may be angled towards the coupling section and delimit a recess (20) formed at an inner side of the waveguide H-plane directional coupler. The orthomode transducer or junction (400) may be positioned at least partially in the recess to increase compactness of the feed system.

Transmitters, receivers, transceivers, transport networks, and methods of use are described herein, including a transmitter comprising a client-side input, transmitter circuitry, and antennas. The client-side input receives baseband signals having client data encoded therein. The transmitter circuitry receives the baseband signals from the client-side input and generates antenna feed signals based on the baseband signals. The antennas receive the antenna feed signals from the transmitter circuitry, generate radiated signals based on the antenna feed signals, and couple the radiated signals into hollow waveguides. The radiated signals are radiated electromagnetic waves configured for coherent detection and having one or more frequencies in a range between 300 Gigahertz (GHz) and 10 Terahertz (THz). The antennas include one of a helical antenna, a waveguide probe antenna, a tapered antenna, a patch antenna, and a slot antenna.

The invention discloses a planar integrated hollow rectangular dielectric waveguide, and relates to the field of planar integrated waveguides, and the planar integrated hollow rectangular dielectric waveguide comprises an upper dielectric layer, a middle dielectric layer and a lower dielectric layer which are distributed from top to bottom, and a metal ground plane attached to the lower surface of the lower dielectric layer. The left side air hole area, the middle wave guide area and the right side air hole area are distributed from left to right; the middle wave guide region is provided with an air slot in the center of the middle dielectric layer to form a hollow wave guide structure; a plurality of columns of air holes penetrating through the upper dielectric layer, the middle dielectric layer and the lower dielectric layer are formed in the left air hole area and the right air hole area, and an air hole array is formed. The planar integrated hollow rectangular dielectric waveguide designed by the application has the advantages of low loss, easy realization of integrated design and planar integration, and simple and stable structure.

A passive device includes a hollow waveguide comprising a first wall structure and a second wall structure extending in a guiding direction, an interconnecting base extending between the wall structures, and an enclosure extending between the wall structures, the enclosure being positioned opposite the interconnecting base; and at least one array of coupled resonant structures enclosed within the waveguide, the array being configured to provide coupled local resonators and microwave or millimeter wave frequency passbands for providing at least one selected microwave or millimeter wave signal, the array extending along the guiding direction and positioned between the wall structures. Each resonant structure extends from the interconnecting base into the hollow waveguide to define a microwave or millimeter wave subwavelength resonant structure, with successive resonant structures separated by a microwave or millimeter wave subwavelength distance. The resonant frequency of the resonant structure is less than the cutoff frequency of the waveguide.

The application discloses a dual-mode dual-circularly polarized antenna array, which comprises a dual-mode feed network and a radiation network stacked in order from bottom to top, the dual-mode feed network is used for transmitting electromagnetic waves in the form of TE10 mode and TEM mode input thereto to the radiation network, and the radiation network is used for radiating electromagnetic waves transmitted by the dual-mode feed network to free space, the dual-mode feed network is a hybrid feed network based on a hollow waveguide structure and an SISL structure, and the radiation network is a hybrid radiation network based on a partition structure and a stepped horn structure; the dual-mode dual-circularly polarized antenna array has the advantages of low profile, low sidelobe, simple structure and capability of being applied to a high-gain scene.

The present invention relates to a waveguide member for conducting electromagnetic waves, and more particularly to a hollow waveguide. The waveguide member has a cavity surrounded by a conductive material. The cavity is configured such that the effective width for electromagnetic waves is greater than the actual dimensions of the cavity.

A compact feed system (600) is provided, comprising an orthomodal transducer or junction (400) and a waveguide H-plane directional coupler (100). The waveguide H-plane directional coupler may consist of two hollow waveguide sections (110, 120) and a coupling section (130) disposed between the two hollow waveguide sections to couple a signal from one hollow waveguide section to another. In a cross-section of the waveguide H-plane directional coupler, the hollow waveguide sections may be angled toward the coupling section and define a recess (20) formed on an inner side of the waveguide H-plane directional coupler. The orthomodal transducer or junction (400) may be located, at least partially, within the recess to increase the compactness of the feed system.

The application discloses a kind of based on low-loss anti-resonance hollow waveguide broadband high-efficiency leaky-wave antenna design method and structure, its technical scheme includes: first based on anti-resonance principle design single dielectric wall hollow waveguide;Further introduce second dielectric wall optimization form double dielectric wall anti-resonance hollow waveguide, significantly enhance the transverse restraint to electromagnetic energy in air cavity by cascading reflection effect, realize super low loss transmission;Finally, etching periodic radiation slot in the upper layer metal plate of double dielectric wall hollow waveguide, construct leaky-wave antenna with frequency scanning function.The application uses air as main transmission medium, fundamentally reduces dielectric loss, so that the antenna has ultra-low transmission loss and ultra-high radiation efficiency in wide frequency band, while the structure is simple, process compatibility is strong, only through standard PCB process can be realized, can be widely used in 5G / 6G communication, millimeter wave radar, terahertz imaging and other high-performance wireless systems.

According to the omnidirectional antenna based on the waveguide structure and the radio frequency module provided by the invention, the antenna radiation is arranged on the upper side and the lower side of the PCB, so that the overall antenna radiation can cover a nearly omnidirectional range, and the omnidirectional radiation characteristic of the antenna is realized. The effect of omnidirectional beam coverage can be realized through a single antenna, and the combination stability with the PCB is good, so that the integration level of the whole module is increased, the product size is small, the cost is low, the product shape is regular, and the installation is facilitated; besides, the electromagnetic waves are transmitted through the hollow waveguide transmission path, so that the board selection of the PCB does not need to consider the high-frequency characteristic requirement of the antenna, and only the board of the conventional PCB needs to be considered, the product cost is further reduced, and the module is more economical and practical; finally, the directional diagram of the omnidirectional antenna has high adjustability, customized adjustment and adaptation can be carried out according to application scene requirements, and the market applicability is high.

A microwave transmission arrangement, comprising a microwave circuit board including a patch; microwave transceiver circuitry coupled to the patch; an electrically conductive hollow waveguide arranged to guide microwave signals between a first end and a second end; and a separator sheet sandwiched between the microwave circuit board and the first end of the hollow waveguide, the separator sheet being configured to allow passage of microwaves between the patch and the hollow waveguide through the separator sheet. The separator sheet is included in an encapsulation separating an encapsulated interior of the microwave transmission arrangement from an exterior outside the encapsulation, the patch, and the microwave transceiver circuitry being in the encapsulated interior, and the hollow waveguide being in the exterior outside the encapsulation.

The present invention discloses a method for preparing a terahertz hollow waveguide based on a plastic heat shrink tube, wherein the plastic heat shrink tube is used as a mechanical support structure, a plastic dielectric film is wound on its outer surface or a thin-walled plastic dielectric tube is nested to form a dielectric layer of the hollow waveguide, a viscous glue is coated on the outside of the dielectric layer, a metal foil is wound to form a metal reflection layer of the hollow waveguide, a resin is coated on the outer surface of the metal layer to form a bonding protective layer, a hot fluid is introduced into the plastic heat shrink tube to shrink the core diameter of the heat shrink tube when heated, and then the heat shrink tube is extracted to obtain a terahertz hollow waveguide having a resin bonding protective layer / metal reflection layer / plastic dielectric layer structure. The present invention provides a feasible method for preparing a terahertz hollow waveguide at low cost and high efficiency, which can promote the application of terahertz waveguides in the fields of commercial 6G wired communications, etc.

To provide a waveguide device capable of reducing the number of operations of a pressurizing device.SOLUTION: According to an embodiment, a waveguide device includes a hollow waveguide and a sheet. The waveguide is provided to be able to guide radio waves between the antenna device and the transmitter, the receiver, or the transceiver. Dry air is supplied to the waveguide from a pressurizing device. The sheet partitions the waveguide between the transmitter, the receiver, or the transceiver and the antenna device. The sheet allows dry air to pass to the antenna device side while the pressure of the dry air on the transmitter, receiver, or transceiver side is higher than the pressure of the dry air on the antenna device side due to the partitioning of the sheet within the waveguide. The pressure of the dry air on the antenna device side is equal to or higher than the atmospheric pressure.SELECTED DRAWING: Figure 1

This circularly polarized wave generator comprises: a hollow waveguide (10), one end of which is a first input / output terminal (11), the other end of which is a second input / output terminal (12), and which has a hollow part having a circular cross-section; and a pair of ridges (20), (30), each of which has a central axis parallel to the tube axis of the waveguide (10) and which is disposed so as to face each other on the inner wall surface of the waveguide (10). The pair of ridges (20), (30) each have a first input / output end section (21), (31) at one end section, a second input / output end section (22), (32) at the other end section, and an intermediate section (23), (33) between the first input / output end section (21), (31) and the second input / output end section (22), (32). The intermediate sections (23), (33) are periodically provided in the tube axial direction of the waveguide (10), and each have, in a first plane perpendicular to the tube axis of the waveguide (10), a plurality of protrusions (23a1) to (23aN), (33a1) to (33aN) protruding along a line orthogonal to a line connecting the pair of ridges (20), (30), and connecting parts (23b1) to (23bN-1), (33b1) to (33bN-1) connecting protrusions adjacent at the plurality of protrusions (23a1) to (23aN), (33a1) to (33aN).

Radar system for environmental detection, in which there are several high-frequency components that are connected via a common high-frequency signal, the so-called LO signal, wherein the LO signal is at least partially guided in at least one hollow waveguide, for which there is at least one molded part connected to the circuit board and the hollow waveguide is formed by a depression, recess or protrusion in the side of the molded part facing the circuit board and a metallized surface of the circuit board.

The invention relates to a hollow waveguide element having a channel (10) which has an open side which is delimited by at least one side wall (11, 12). The side wall (11, 12) has a plurality of electric contact surfaces (20) which are spaced apart from one another.

The invention relates to a compact radial high-power microwave generator, and belongs to the technical field of high-power microwaves. The device is composed of a cathode 1, a first drift section 2, a coupling cavity 3, a second drift section 4, a radial slow wave structure 5, an electron beam collector 6, a radial coupling channel 7, a mode converter 8 and an output waveguide 9. The invention relates to a compact radial high-power microwave generator which is of a circumferential symmetrical structure, mainly utilizes interaction between a high-current relativistic electron beam radially emitted by a cathode 1 and a transverse electric mode in a radial slow wave structure 5, and outputs microwaves through outward coupling of a coupling cavity 3 near the cathode side. Therefore, the purposes of reducing the axial size of the radial high-power microwave generator and realizing hollow waveguide single-mode output are achieved.

A radar level gauge system comprising a first microwave unit including a transmitter patch for transmitting a first transmit signal, a receiver patch for receiving a first reflection signal, and processing circuitry for determining a first level measurement; a second microwave unit including a transmitter patch for transmitting a second transmit signal, a receiver patch for receiving a second reflection signal, and processing circuitry for determining a second level measurement; an antenna; and a signal coupling arrangement including a first hollow waveguide directional coupler, a second hollow waveguide directional coupler, and a signal combiner.

The invention relates to a method for determining a permittivity of a medium (3) by means of a calibration device (1) and a radar-based fill level measuring apparatus (2), wherein the method comprises at least the following steps: - providing a reference environment in the hollow waveguide (5), in-coupling a first radar signal having at least one first frequency into the hollow waveguide (5) and out-coupling a first received signal, in-coupling a second radar signal having at least one second frequency into the hollow waveguide (5) and out-coupling a second received signal, - introducing the calibration device (1) into a container (9) containing the medium (3) such that the hollow waveguide (5) is filled with the medium (3), in-coupling the first radar signal into the hollow waveguide (5) and out-coupling a third received signal, - in-coupling the second radar signal into the hollow waveguide (5) and out-coupling a fourth received signal, - determining a permittivity of the medium (3) on the basis of the first, second, third and fourth received signals.

The invention relates to a contact assembly having a circuit board, in particular a multilayer circuit board. The circuit board has an electrically insulating layer and an electrically conductive layer. The circuit board also has a hollow waveguide channel, said hollow waveguide channel being designed and arranged to guide, in particular transversely to the flat extension of the circuit board, electromagnetic waves, in particular microwaves or radar waves formed by microwaves, through the circuit board. The contact assembly also has a microwave component which is connected to the circuit board in the region of the input end of the hollow waveguide channel. The microwave component is designed to generate microwaves and to transmit the microwaves into the hollow conductor. The circuit board has at least one adaptation layer for the thermal expansion behavior or the temperature expansion coefficient of the microwave structural element in the region of the microwave structural element.

An optical hollow waveguide component (25), in particular for the homogenization of EUV light, comprises two support elements (26) and two insertion elements (28), in particular two plate-shaped insertion elements. The insertion elements (28) are inserted between the support elements (26) in such a way that a hollow waveguide (11) is formed between the insertion elements (28). The hollow waveguide component (25) is suitable in particular for use in an illumination optics unit for a mask inspection system (1) for use with EUV illumination light. An optical system having such an illumination optics unit and a mask inspection system having the optical system are also described.

The present disclosure provides a tunable waveguide attenuator comprising a base structure with a bottom wall, a first side wall, and a second side wall, wherein the first side wall and the second side wall are arranged on opposite sides of the bottom wall, and wherein the bottom wall, the first side wall, and the second side wall enclose a hollow waveguide channel on three sides. The tunable waveguide attenuator further comprises a movable cover for the hollow waveguide channel that on a surface facing the bottom wall comprises a first section and a second section with different surface loss properties, wherein the movable cover is movable such that the area of the hollow waveguide channel that is covered by the first section and the second section changes with the movement of the movable cover.

A system for drilling through a ground borehole using millimeter wave (MMW) energy featuring a MMW power source configured to generate MMW energy, at least one waveguide coupled to the MMW power source and configured to deploy along the borehole and to guide the MMW energy to a borehole bottom, and an optical element coupled to a distal end of the waveguide and configured to pressure seal the waveguide and to transmit the MMW energy to the borehole bottom. The waveguide comprises a hollow waveguide body encompassing a cavity at an internal waveguide pressure. When the distal end of the waveguide is immersed in a fluid filling the borehole at a fluid pressure and a fluid density, at least in the vicinity of the bottom of the waveguide: the internal waveguide pressure is lower than the fluid pressure and / or the internal waveguide density is lower than the fluid density.

There is provided a system for contactless signal transmission through a rotary joint, comprising a transmitter and a receiver wherein the transmitter is on a first part of the rotary joint and the receiver is on a second part of the rotary joint, the first part and the second part being opposite and separated by an air gap, the surface of the first part and the surface of the second part facing each other are perpendicular to the rotating shaft of the rotating joint; and a choke coil in the air gap contacting one of the first component and the second component, the choke coil including a printed circuit board having a through-hole coaxial with the rotation axis and an electromagnetic chip, each of the transmitter and the receiver including a hollow waveguide, at least the transmitter including a waveguide polarizer, the diameter of the waveguide polarizer is smaller than the diameter of the circular hollow waveguide, and two longitudinal radially opposed grooves are in the wall of the waveguide polarizer.

The invention relates to a buffer device (18) with at least one self-propelled shuttle (12, 30, 32) for picking up objects to be buffered, wherein each shuttle is movable along a track and comprises at least two antennas (13, 14, 29, 31, 45, 46), and with two slotted hollow waveguides (1, 2, 23, 39, 60, 62, 64, 66, 68, 70, 72, 74, 76, 78, 80, 82, 84, 86), each comprising segments (3, 4, 5, 6, 24-28, 40-44) arranged one behind the other along the track and designed to accommodate antennas which cooperate with the respective slotted hollow waveguide in which they are accommodated for signal transmission. The first slotted waveguide operates at a first frequency. The second slotted waveguide operates at a second frequency. The first and second frequencies are different.The invention further relates to a method for operating the buffer device (18) comprising inserting the first antenna (13, 29, 31) of a self-propelled shuttle (12, 30, 32) into the first slotted hollow waveguide (1, 23), inserting the second antenna (14, 45, 46) of the self-propelled shuttle into the second slotted hollow waveguide (2, 39), operating the first slotted hollow waveguide at the first frequency, and operating the second slotted hollow waveguide at the second frequency.

The invention discloses a liquid viscosity detection system and method based on double-interface guided waves. The system comprises a hollow waveguide tube, an external liquid storage container, a signal transceiving unit I, a signal transceiving unit II and a signal processing unit, the hollow waveguide tube is arranged in the signal transceiving unit I and the signal transceiving unit II in a penetrating mode, the signal transceiving unit I and the signal transceiving unit II are arranged at intervals in the axial direction of the hollow waveguide tube, and the signal processing unit is electrically connected with the signal transceiving unit I and the signal transceiving unit II. To-be-measured fluid is arranged in the external liquid storage container and the hollow waveguide tube, and one end of the hollow waveguide tube extends into the external liquid storage container and is immersed below the to-be-measured fluid in the external liquid storage container. According to the invention, the sensing area is increased by using the inner interface and the outer interface, the detection sensitivity and the signal-to-noise ratio are effectively improved, the performance of the sensor can be optimized by optimizing structural parameters, and the sensor has the advantages of accurate measurement and strong anti-interference capability.

This document describes a transmission network, network elements, and usage methods, including a transmitter comprising a client-side input, a transmitter circuitry, and an antenna. The client-side input is configured to receive a baseband signal encoded with client data. The transmitter circuitry is configured to receive the baseband signal from the client-side input and generate an antenna feed signal based on the baseband signal. The antenna is configured to receive the antenna feed signal from the transmitter circuitry, generate a radiated signal based on the antenna feed signal, and couple the radiated signal into a hollow waveguide. Each radiated signal is a radiated electromagnetic wave configured for coherent detection and having a frequency in the range of 300 GHz to 10 THz.

There is provided a method for generating broadband radiation, the method comprising providing a hollow waveguide having an entrance and an exit and comprising a molecular gas; varying an electric field within the hollow waveguide to alter a rotational energy state of the molecular gas from a first state to a second state; and providing the pump radiation to the entrance of the hollow wave guide to 5 generate the broadband radiation at the exit by Raman scattering from the molecular gas in the second state.