45 results about "Slot-waveguide" patented technology

The application relates to the technical field of antennas, in particular to a dual-mode high-gain millimeter wave beam scanning antenna, which comprises a bottom dielectric substrate provided with a first excitation port and a second excitation port at two ends; a top dielectric substrate comprising a '+'-shaped dielectric cover layer arranged on the top of the bottom dielectric substrate; parallel plate slot waveguides connected with a first substrate integrated waveguide horn and a second substrate integrated waveguide horn at two ends respectively; a first waveguide transition structure connected with the first excitation port and the first substrate integrated waveguide horn at two ends respectively; and a second waveguide transition structure connected with the second excitation port and the second substrate integrated waveguide horn at two ends respectively. The application can realize wide-range beam scanning including backward end radiation, meanwhile, high-gain single beam scanning is maintained, the application has the characteristics of simple structure, easy integration and processing, high gain and full coverage of the upper half space, and greatly improves the performance of a millimeter wave wireless communication system.

The utility model discloses a slot waveguide array antenna attached to the outer side of an elastic wall. The slot waveguide array antenna comprises a protection base embedded in the elastic wall and an antenna substrate attached to the outer side of the elastic wall. The bottom of the antenna substrate is welded with a connecting socket, the connecting socket is inserted into the protection base, one side of the upper surface of the antenna substrate is provided with an inclined chamfer, and the upper surface of the antenna substrate is provided with slot guided waves. The utility model provides a detection antenna which is suitable for being used on a missile, can save the space of the whole missile, is high in performance and narrow in radiation pattern of a pitching surface, and in order to improve the available design space of the antenna, reduce the design difficulty and save the space of the whole missile, a transmitting-receiving antenna which is conventionally arranged on the inner side of the missile wall and is conformal with the missile wall is improved into a transmitting-receiving antenna which is attached to the outer side of the missile wall. The available design space of the antenna is increased to a great extent by arranging the antenna on the outer side of the missile wall, so that the design difficulty is reduced, the antenna performance is improved, and the whole missile space is saved.

The invention discloses a conversion structure of an E-plane waveguide feeder line and a deep-groove waveguide feeder line, which comprises the E-plane waveguide feeder line, the deep-groove waveguide feeder line and a transition structure, and is characterized in that the E-plane waveguide feeder line and the deep-groove waveguide feeder line are perpendicular to each other; wherein the deep groove waveguide feeder line is higher than the E-plane waveguide feeder line, one end of the E-plane waveguide feeder line and one end of the deep groove waveguide feeder line are partially overlapped to form a transition through hole, and the transition structure is arranged at one end, connected with the E-plane waveguide feeder line, of a spacer of the deep groove waveguide feeder line. The E-plane waveguide feed line is adopted, the characteristic that the middle current is zero is utilized, electromagnetic wave leakage cannot be caused due to separation, electromagnetic waves can be converted to the deep groove waveguide feed line, electromagnetic wave conversion can be achieved without welding, the turning structure of the feed network is placed on the E-plane feed line, and the feed line of the radiation structure is achieved through the deep groove waveguide. And a transition structure between the two feeder lines is designed, so that high-efficiency conversion of the two feeder line modes is realized.

The utility model relates to the technical field of terahertz radio frequency circuits, solves the technical problems of narrow relative bandwidth and complex processing of a terahertz frequency band waveguide duplexer, and particularly relates to a terahertz multistage coupling type duplexer easy to realize by CNC (computer numerical control). Comprising a duplexer main body structure which is formed by separably combining an E-plane slotted waveguide structural body A and an E-plane slotted waveguide structural body B. The duplexer main body structure is formed by cascading an E-plane Y-type junction with two filters and is provided with an input waveguide, a low-frequency output waveguide and a high-frequency output waveguide. Compared with a traditional T-shaped junction, the T-shaped junction is more suitable for the design of a broadband waveguide duplexer, and the compactness and simplicity of the structure are kept. Actual measurement shows that 24% of total working bandwidth is obtained, and the overall performance of a terahertz communication system is further improved.

The present invention discloses a radio frequency transmit and receive assembly kit comprising a slotted waveguide antenna assembly (100) wherein the slotted waveguide antenna assembly (100) comprises a plurality of sets of slotted waveguide antennas wherein each of the plurality of sets of slotted waveguide antennas comprises antenna feed elements forming a set of a plurality of antenna feed elements; and a circuit arrangement (306) for transmitting and receiving radio frequency (RF) signals wherein the circuit arrangement further comprises one or more circuit connection elements adapted to form an RF feed connection with an antenna feed element of the plurality of antenna feed elements, the slotted waveguide antenna assembly is mountable to the circuit arrangement in a plurality of different orientations, where, in each orientation, a particular one of the antenna feed elements forms an RF feed connection with a respective one of the circuit connection elements.

The application belongs to the technical field of millimeter wave transmission, and discloses a zero-point adjustable low-loss dual-frequency filter based on a printed ridge gap waveguide, which comprises two waveguide resonant cavities with printed ridge gaps arranged in a center-symmetrical and back-to-back mode along a vertical axis and a shared ground metal plate, the shared ground metal plate is arranged between the two waveguide resonant cavities, a rectangular slot is etched on the shared ground metal plate, the waveguide resonant cavity comprises an upper artificial magnetic conductor layer, a transmission layer and a lower artificial magnetic conductor layer, a resonant column is arranged through the upper and lower artificial magnetic conductor layers and the transmission layer, the resonant column is connected with upper and lower metal ground plates, resonance is generated through the resonant column, a slow wave structure is arranged in the middle of the lower artificial magnetic conductor layer, the transmission layer is connected with a microstrip line, and the microstrip line and the lower artificial magnetic conductor layer are connected through a slow wave through hole. The length and width of the resonator are changed, the electromagnetic mixed coupling mode is adjusted by changing the size and position of the rectangular slot, and the zero-point is adjusted.

The application discloses a high-power microwave waveguide slot antenna array, and aims at solving the problem that a rectangular waveguide slot antenna cannot radiate in extreme temperature. The application is composed of a vacuum window sealed power divider, a partition waveguide, N sets of flanges, N curved waveguides and N high-power microwave rectangular waveguide slot antennas with dielectric covers. The microwave is divided by the vacuum window sealed power divider and then input into the partition waveguide, the N sets of microwaves are transmitted through the N sets of flanges and the curved waveguides, and then input into the N high-power microwave rectangular waveguide slot antennas with dielectric covers, and finally radiated. The vacuum window sealed power divider is composed of a power divider main body, a welded cover, a sealing plate and a dielectric window. The partition waveguide is composed of a connecting plate and a partition plate. The curved waveguide is composed of a vertical waveguide and a horizontal waveguide. The high-power microwave rectangular waveguide slot antenna with the dielectric cover is composed of a dielectric cover, a slotted waveguide, a support column and a support rod. The application has the advantages of compact structure, large power capacity and application in extreme temperature.

An optical waveguide element according to one embodiment incudes a substrate; a strip waveguide portion formed in a first layer located above the substrate; a slot waveguide portion formed in a second layer located above the substrate and different from the first layer; and a mode conversion portion connected between the strip waveguide portion and the slot waveguide portion. The mode conversion portion includes a first optical confinement portion formed in the first layer and connected to the strip waveguide portion, and a pair of second optical confinement portions formed in the second layer and connected to the slot waveguide portion. A width of the first optical confinement portion decreases as the first optical confinement portion approaches the slot waveguide portion from the strip waveguide portion. The first optical confinement portion is included inside the pair of second optical confinement portions in a plan view of the substrate.

The application provides a resonator and a photonic chip, comprising: a micro-ring waveguide and a straight waveguide, a coupling section of the straight waveguide and the micro-ring waveguide, in the coupling section, the straight waveguide and the micro-ring waveguide have the same waveguide structure, the waveguide structure comprises: a first waveguide arm and a second waveguide arm, and there is a radiation slot between the first waveguide arm and the second waveguide arm; a side of the first waveguide arm facing the radiation slot is provided with a plurality of first grating slots arranged along the extension direction of the radiation slot; a side of the second waveguide arm facing the radiation slot is provided with a plurality of second grating slots arranged along the extension direction of the radiation slot; and the first grating slots and the second grating slots are one-to-one aligned. Thus, the second waveguide arm and the first waveguide arm in the waveguide structure of the coupling section can constitute a subwavelength grating slot waveguide with a continuous outer boundary. Since the outer boundary is continuous, mode disturbance and sidewall scattering can be effectively suppressed, so that the scattering loss of the resonator can be significantly reduced.

This document describes a slot waveguide modulator that utilizes both silicon photonics and electro-optic materials to achieve high bandwidth, high efficiency and low optical loss. The slot waveguide modulator has an electro-optic layer that is sandwiched between two mode stopper layers, where the mode stopper layers are formed in waveguide layers having a refractive index that is higher than the refractive index of the electro-optic layer.

The present invention provides an optical waveguide element capable of performing mode conversion between a strip waveguide section and a slot waveguide section, which have different layers. [Solution] An optical waveguide element according to one embodiment comprises a substrate, a strip waveguide portion formed in a first layer located above the substrate, a slot waveguide portion formed in a second layer located above the substrate and different from the first layer, and a mode conversion portion connected between the strip waveguide portion and the slot waveguide portion. The mode conversion portion includes a first optical confinement portion formed in the first layer and connected to the strip waveguide portion, and a pair of second optical confinement portions formed in the second layer and connected to the slot waveguide portion. The width of the first optical confinement portion decreases as it approaches the slot waveguide portion from the strip waveguide portion. The pair of second optical confinement portions include the first optical confinement portion on the inside in a plan view of the substrate.

The disclosure provides an on-chip polarization beam splitter based on a double-slot waveguide, comprising a substrate, two core waveguides and three restriction waveguides. The three restriction waveguides are arranged alternately with the two core waveguides, and there are hollow slots between two adjacent waveguides; the first core waveguide, the first restriction waveguide, the second restriction waveguide and the two hollow slots between adjacent waveguides together constitute a first double-slot waveguide; the second core waveguide, the second restriction waveguide, the third restriction waveguide and the two hollow slots between adjacent waveguides together constitute a second double-slot waveguide. The double-slot waveguide structure has a strong polarization-dependent mode field distribution regulation characteristic, which can directly separate the fundamental transverse electric mode and the fundamental transverse magnetic mode to different waveguides without the help of high-order mode conversion, avoiding mode conversion loss; the polarization beam splitter provided by the disclosure has the advantages of small coupling loss, short coupling distance, high polarization extinction ratio and simple preparation process while realizing effective polarization beam splitting, which is beneficial to compact and large-scale photonic integration applications.

This application discloses an optofluidic chip, a computing device, and a photosensitive sensor. The optofluidic chip includes a substrate, a slit waveguide with nano-slits, a conductive waveguide, a thin layer disposed on the slit waveguide and the conductive waveguide, and a liquid thin film disposed on the thin layer. The slit waveguide is used to propagate the optical field of pulsed light and to form a local optical mode field using the nano-slits. The conductive waveguide is used to absorb the local optical mode field to form plasma, thereby generating optical excitation heat. The thin layer is used to transmit the optical excitation heat, causing a thermocapillary effect in the thin layer and the liquid thin film, which deforms the liquid thin film. The liquid thin film is used to store pulsed light information using the deformation. The technical solution disclosed in this application utilizes a simple optical waveguide, substrate, thin layer, and liquid thin film to achieve the storage of pulsed light information by using optical excitation heat to drive the liquid thin film to flow and deform. This reduces the complexity and cost of the chip structure and the energy consumption of the chip.

The utility model discloses a rectangular groove waveguide horn antenna, which comprises a horn antenna body, the horn antenna body is composed of a horn antenna main body and a cross-shaped back plate, the back surface of the cross-shaped back plate is provided with a quick mounting mechanism, and the quick mounting mechanism comprises a threaded column, a fixing plate, four insertion blocks, two limiting sliding grooves, two limiting sliding plates and two strip-shaped pressing plates. The outer wall of the threaded column is sleeved with a movable plate, a fixed six-face lantern ring is arranged on the back face of the movable plate, a rotating six-face lantern ring is arranged on the back face of the fixed six-face lantern ring, an annular rotating groove is formed in the front face of the rotating six-face lantern ring, and a rotating ring is arranged in an inner cavity of the annular rotating groove. According to the utility model, the installation work of the rectangular groove waveguide horn antenna can be rapidly completed by rotating one rotating six-surface lantern ring through the cooperation of the threaded column, the fixed plate, the insertion block, the limiting sliding plate, the strip-shaped pressing plate, the movable plate, the fixed six-surface lantern ring, the rotating six-surface lantern ring and the rotating ring by utilizing the arrangement of the rapid installation mechanism; and the complexity of mounting the rectangular groove waveguide horn antenna is reduced.

The application relates to the field of silicon-based photoelectric integrated devices, in particular to a controllable high-nonlinear silicon-based graphene multimode slit waveguide and a preparation method thereof. The silicon-based graphene multimode slit waveguide comprises a silicon oxide substrate, a plurality of silicon waveguides arranged in parallel on the silicon oxide substrate, the silicon waveguides are strip-shaped and have rectangular cross sections, the silicon waveguides are arranged with slit gaps to form a multimode slit waveguide, graphene films are arranged on the surfaces of the multimode slit waveguide and extend to the surface of the silicon oxide substrate on both sides, first electrodes and second electrodes are arranged on the surfaces of the graphene films on both sides of the multimode slit waveguide, and a third electrode is arranged on the silicon oxide substrate at a position not covered by the graphene films; and ion gel layers are arranged above the graphene films, the silicon oxide substrate and the electrodes. The application greatly improves the nonlinear strength of the device and can be widely applied to high-speed optical logic operation devices and multimode optical logic operation.

The invention discloses a slot waveguide antenna, a radar with the same and an automobile, and relates to the technical field of waveguide antennas. Comprising a top plate and a bottom plate, the cross sections of the top plate and the bottom plate are rectangular, the bottom plate is parallel to the top plate and located below the top plate, the lower surface of the top plate is fixedly connected with a plurality of cuboid metal columns, the metal columns are enclosed on the lower surface of the top plate in a rectangular shape, and each side edge of the rectangular shape is composed of a plurality of metal columns distributed at intervals. At least two rows of metal columns are arranged corresponding to each side edge, the center distance between every two adjacent metal columns is smaller than 1 / 2 of the free space wavelength, and the air distance is smaller than 1 / 4 of the free space wavelength. The top of the metal column is fixedly connected to the lower surface of the top plate, and a gap smaller than 1 / 4 of free space wavelength is formed between the bottom of the metal column and the upper surface of the bottom plate; the top plate is provided with a plurality of waveguide slots, and the middle part of the bottom plate is provided with a waveguide port. The device has the beneficial effect that the phenomenon of energy leakage caused by the fact that the cavity is not closed can be avoided.

The invention discloses a fishbone grating micro-ring resonator sensing method and device based on envelope spectrum detection, and relates to the technical field of integrated optical sensing, and the method comprises the steps: designing a fishbone-shaped sub-wavelength grating slotted waveguide micro-ring resonator based on an SOI platform; analyzing light field distribution and a power limiting factor by adopting a three-dimensional finite difference time domain simulation method; establishing a transmissivity model of the micro-ring resonator by using a transmission matrix method, forming an envelope spectrum, and extracting a peak position and a drift distance characteristic parameter of the envelope spectrum; and calculating the sensing sensitivity according to the envelope spectrum drift data. By adopting the fishbone-shaped sub-wavelength grating waveguide structure and the envelope spectrum tracking detection method, the inherent contradiction between the performance and the size of the micro-ring resonator in the miniaturization process is cooperatively solved, the ultrahigh sensitivity of 565nm / RIU is successfully realized under the extremely small radius of 10 microns, the free spectral range limitation of single-peak tracking is broken through, and the sensitivity of the micro-ring resonator is greatly improved. And a reliable technical path is provided for realizing a high-density and high-flux integrated sensing chip.

The invention discloses waveguide equipment with an external sensor and an internal environment real-time detection method thereof. The method comprises the steps that a temperature and humidity sensor and a detection circuit are integrated in a shielding box through a slotted waveguide space synthesizer to form an external sensor, and environment monitoring is achieved through multi-sensor redundancy layout; establishing a temperature and humidity correction model through a least square method, and determining a data effective range in combination with a 3 sigma criterion; after abnormal values of real-time data are removed, the average value is taken to calculate the actual temperature and humidity, and the number of a fault sensor is automatically reported. The device adopts a graded waveguide structure, the microstrip probe and the waveguide cavity are accurately coupled through the unique waveguide slotting design, and the height difference between the bottom plate and the upper cover plate guarantees the center positioning of the probe. According to the invention, waveguide sealing performance and detection compatibility are realized through external sensor layout, the measurement precision is improved by combining a data fusion algorithm, and remote fault positioning and equipment health management are supported.

A method includes providing a plurality of devices, each of the plurality of devices including one or more slot waveguides, a first contact pad, a second contact pad, and organic electro-optic (OEO) material provided within the one or more slot waveguides; forming a first temporary circuit element including a conductive material, the first temporary circuit element being coupled to the first contact pad of each of the plurality of devices; forming a second temporary circuit element including a conductive material, the second temporary circuit element being coupled to the second contact pad of each of the plurality of devices; applying a direct current (DC) voltage across each of the plurality of devices using the first and second temporary circuit elements to apply an electric poling field across the OEO material of each of the plurality of devices during a thermal cycle to effect electric field poling of the OEO material; and removing the first and second temporary circuit elements.

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 belongs to the technical field of millimeter wave transmission, and discloses a zero-point-adjustable low-loss double-frequency filter based on a printing ridge gap waveguide, which comprises two waveguide resonant cavities and a common ground metal plate, the two waveguide resonant cavities are in central symmetry along a vertical axis and are provided with printing ridge gaps back to back, and the common ground metal plate is arranged between the two waveguide resonant cavities. A rectangular slot is etched on the common ground metal plate, the waveguide resonant cavity comprises an upper artificial magnetic conductor layer, a transmission layer and a lower artificial magnetic conductor layer, a resonant column penetrates through the upper and lower artificial magnetic conductor layers and the transmission layer, the resonant column is connected with the upper and lower metal grounding plates, and resonance is generated through the resonant column; a slow wave structure is arranged in the middle of the lower artificial magnetic conductor layer, the transmission layer is connected with a microstrip line, and the microstrip line is connected with the lower artificial magnetic conductor layer through a slow wave through hole. According to the invention, the length and the width of the resonator are adjusted, and the electromagnetic hybrid coupling mode is adjusted by changing the size and the position of the rectangular groove, so that the zero point can be adjusted.

The invention relates to a transport system having a mobile device that can be moved along a road section, in particular a track, in which, for high-frequency data transmission, a slotted waveguide of the transport system is arranged parallel to the road section, said slotted waveguide surrounding a cavity, the invention relates to a mobile device for a motor vehicle, in particular a motor vehicle, comprising a slotted waveguide having a cavity which opens into the environment via a slot of the slotted waveguide which runs through in the direction of a travel route, in particular in the direction of a track, the mobile device having an antenna which projects through the slot of the slotted waveguide into the cavity of the slotted waveguide, in particular for inputting or outputting electromagnetic waves, the slotted waveguide being made of a steel sheet as a bent part.

Structures for a phase shifter and methods of forming such structures. The structure comprises a first waveguide core, a second waveguide core laterally adjacent to the first waveguide core, and a third waveguide core laterally adjacent to the second waveguide core. The second waveguide core and the first waveguide core are separated by a first slot, and the third waveguide core and the second waveguide core are separated by a second slot. The structure further comprises a layer that overlaps with respective portions of the first waveguide core, the second waveguide core, and the third waveguide core. The layer comprises a first electro-optic material.

The invention relates to a transport system having a mobile part movable along a route, in particular a rail, wherein a slotted waveguide of the transport system is laid parallel to the route for high-frequency data transmission and surrounds a cavity which opens into the surroundings by way of a slot of the slotted waveguide that is continuous in the route direction, in particular in the rail direction, wherein the mobile part comprises an antenna which protrudes through the slot of the slotted waveguide into the cavity of the slotted waveguide, in particular for incoupling or outcoupling electromagnetic waves, wherein the slotted waveguide is produced as a stamped and bent part made from a steel sheet metal.

Waveguide and / or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, the assembly may comprise a waveguide block comprising a first surface on a first side of the waveguide block and a second surface on a second side of the waveguide block opposite the first side. One or more waveguides may be formed in the waveguide block. One or more antenna slots may be operably coupled with one or more of the waveguides. One or more auxiliary grooves may be positioned adjacent to at least one of the antenna slots and may mimic, or at least substantially mimic, at least one of the one or more antenna slots, such as in length and / or width.

The invention relates to a W-band low-sidelobe slot waveguide array antenna, and the antenna comprises a metal waveguide housing which is internally provided with a waveguide channel; the radiation slot array comprises a plurality of radiation slots formed in the wide wall surface of the metal waveguide shell, the plurality of radiation slots are arranged in a two-dimensional array, and the excitation amplitude of each radiation slot is determined by a two-dimensional Taylor distribution weighting coefficient; the hierarchical power division feed network comprises multi-stage power dividers which are branched stage by stage, the power division ratio of each stage of power divider is determined by a two-dimensional Taylor distribution weighting coefficient, each stage of power divider generates an inherent phase difference under the condition of unequal power division ratios, and the power division ratios, the geometric parameters of a bifurcation region and the length of a phase compensation section meet a constraint relation. The sum of the inherent phase difference and the compensation phase difference compensates for the path phase difference between the two output branches. Amplitude weighting and phase compensation are jointly achieved in the same power divider structure, the number of independent compensation sections is reduced, the total path of a feed network is shortened, and W-waveband transmission loss is reduced.

The invention discloses a preparation process of a silicon-based MZ modulator, and relates to the field of optical communication elements. The preparation process comprises the following steps: preparing a silicon-on-insulator wafer; preparing a silicon waveguide and etching to preliminarily form a silicon layer; accelerating the charged foreign ions and injecting the charged foreign ions into the silicon layer; processing by adopting deep ultraviolet lithography equipment, and etching to manufacture a Slot in the middle of the waveguide; manufacturing an electrode through hole and an aluminum-copper metal layer; thickening the silicon dioxide layer, and etching a metal bonding pad; performing 1.2 [mu] m dry etching by using a plasma beam, and opening a window in the middle part; wet etching is carried out for 3 min, and silicon oxide in the Slot waveguide is removed on the premise that other structures are not damaged; and uniformly and fully filling the electro-optical organic polymer into the Slot by adopting a spin-coating method. Compared with the prior art, the invention has the advantages of high bandwidth modulation, compatibility with CMOS (Complementary Metal Oxide Semiconductor) process, low cost, high process maturity and easiness in large-scale integration.

Apparatuses and methods for removing caps, such as NMR rotor caps. The apparatuses and methods may permit caps to be removed in a manner that minimizes damage to equipment and instruments. Microwave waveguides that may include an elongated waveguide, a spline horn, and a slotted waveguide. Analytical instruments that include the waveguides.

The invention relates to the technical field of optical sensors, in particular to an optical sensor based on a groove type waveguide and a cascade micro-ring resonant cavity structure. The optical sensor comprises an input waveguide, an output waveguide, a groove type micro-ring resonant cavity and a reference micro-ring resonant cavity. According to the invention, the refractive index sensitivity of 9264 nm / RIU and the detection limit of 2.91 * 10 <-5 > RIU are realized through optimization design. The invention has the characteristics of compact structure and compatible preparation process with a CMOS platform, and can be widely applied to the fields of biomolecular detection, medical diagnosis, environmental monitoring and the like.

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