411results about "Leaky-waveguide antennas" patented technology

A sensor as a service ecosystem is disclosed herein. In use, the system includes functionality for receiving first sensor data at a sensor as a service platform, where the first sensor data corresponds to a first capability level of a first sensor. The system also receives a selection of a sensor upgrade for the first sensor, and configures enhanced sensor capabilities for the sensor upgrade based on the selection. Further, the system sends a sensor update with the enhanced sensor capability from the sensor-as-a-service platform to the first sensor. Finally, the system receives second sensor data from the first sensor at the sensor as a service platform, where the second sensor data corresponds to a second capability level of the first sensor.

The technology described herein is directed towards a transceiver with beam scanning capability based on leaky wave antenna technology and substrate integrated waveguide technology, along with a metallic covering that determines which direction the antenna radiates signals. The leaky wave antenna can include different respective groups of slot pairs having different respective periodicities, corresponding to different respective beam steering directions. One or more metallic covers can be used to cover some of the slot pair sections, such that the sections under cover behave like a conventional substrate integrated waveguide and the exposed section(s) behave like conventional leaky wave antennas. The metallic covers can be moved as desired, such as attached via magnets. The transceiver can thus steer signals to a wearable or portable device that includes a passive metasurface while mitigating null regions. The slot pairs can be asymmetrical reflection-canceling slot pairs, to achieve broadside radiation while avoiding band-stop effects.

The invention relates to the technical field of antenna control, and discloses a control method for a leaky-wave antenna and a communication device. The method comprises the following steps: measuring the dispersion characteristic of the leaky-wave antenna, establishing a second-order nonlinear mapping relation between a propagation constant and a control voltage, and obtaining a dispersion control parameter group; reversely deducing the target beam directional angle to obtain a target propagation constant, and calculating an initial voltage value of each control unit in combination with the parameter group to form a voltage gradient control sequence; correcting the propagation constant of each unit by adopting a distance compensation algorithm, and recalculating to obtain distance self-adaptive voltage distribution data; and detecting a beam quality factor in real time, updating voltage distribution data through a gradient descent algorithm when the beam quality factor deviates from a target value, and outputting a control voltage sequence to drive each control unit. The leaky-wave antenna control method and device solve the problems that in an existing leaky-wave antenna control technology, the beam quality is reduced and the data rate is sharply attenuated during long-distance transmission, and the beam control precision and the long-distance transmission performance of the leaky-wave antenna in the terahertz frequency band are improved.

Various embodiments relate to a radar system, including: a transmitter; a transmit antenna connected to the transmitter, wherein the transmit antenna is a circular polarized antenna; a receiver; a receive antenna connected to the receiver, wherein the receive antenna is a dual polarization antenna having a main lobe and ambiguity sidelobes; wherein the radar system is configured to: transmit a first and second radar signal with first and second circular polarizations in first and second modes; receive reflected first and second radar signals; process the received first and second radar signals to detect a target and to produce first and second mode target powers; comparing the first mode target power to the second mode target power to determine which lobe of the antenna in which the target is located.

The invention provides a fixed-frequency beam scanning leaky-wave antenna and electronic equipment. The leaky-wave antenna comprises a first microstrip line and a second microstrip line, wherein the first microstrip line and the second microstrip line are used for transmitting radio frequency signals and are arranged at an interval; the N antenna units are connected to the first microstrip line and the second microstrip line, and each antenna unit comprises a first switch and a second switch; a first stub and a second stub, and an antenna. According to the technical scheme, the leaky-wave antenna is simple in structure, easy to process, high in expansibility and capable of reducing parasitism, transmission loss, element loss and the like.

Provided is a microstrip array antenna including a dielectric substrate, a feed line formed on a top surface of the dielectric substrate, a plurality of radiation elements formed on the top surface of the dielectric substrate and electrically connected to the feed line, and a ground surface formed on a bottom surface of the dielectric substrate. At least one radiation element among the plurality of radiation elements may have a bottleneck shape.

An antenna structure includes a main radiation element, a first ground element, a second ground element, a carrier element, a metal cavity, a first capacitor, and a second capacitor. The first ground element includes a first connection segment, a first protruding segment, and a second protruding segment. The second ground element includes a second connection segment, a third protruding segment, and a fourth protruding segment. The main radiation element is surrounded by the first ground element and the second ground element. The first capacitor is coupled between the first protruding segment and the third protruding segment. The second capacitor is coupled between the second protruding segment and the fourth protruding segment. The metal cavity is coupled to the first connection segment and the second connection segment. The carrier element is disposed in the metal cavity.

[0060] The invention relates to a high-frequency chip arrangement 100. The high-frequency chip arrangement comprises a high-frequency chip 112 configured to radiate and receive high-frequency waves, and a first housing 114, 115 having a cavity, consisting of a housing cover 115 and a substrate 114, wherein the first housing surrounds the high-frequency chip when the housing cover is attached to the substrate. The high-frequency chip is arranged on a top surface of the substrate such that it radiates the high-frequency waves away from the substrate. The substrate, the high-frequency chip, and the first housing form a module 110.The high-frequency chip arrangement has a second housing 120 that surrounds at least the module, wherein an intermediate space 121 between the module and the second housing is filled with a potting compound 104, so that the module is completely surrounded by the potting compound and the high-frequency waves pass through the first housing, the potting compound, and the second housing.

The invention provides a leaky-wave antenna and a frequency-modulated continuous wave generation method based on the leaky-wave antenna, and relates to the field of millimeter-wave radar, and the method comprises the steps: constructing a space-time coding matrix, configuring a radiation unit state regulation and control beam direction in a space domain, modulating a radiation unit state switching rule in a time domain to generate a frequency-modulated continuous wave, and achieving space-time dual-domain regulation and control. And frequency-modulated continuous waves with controllable bandwidth are generated. The space-time coding leaky-wave antenna is formed by alternately arranging 1-bit radiation units in an upper row and a lower row, switching of radiation / non-radiation states is achieved by loading a synchronous bias PIN diode across an annular gap, a space-time coding matrix is constructed, the states of the radiation units are configured in a space domain to regulate and control the wave beam direction, and the space-time coding leaky-wave antenna is formed. Modulating the switching rule of the radiation unit in a time domain, and generating a frequency-modulated continuous wave; the radiation efficiency is improved by the alternative arrangement of the radiation units, the control difficulty and the hardware cost are reduced, multiple functions are integrated into a single device, and the problem of low integration level of the traditional separation architecture is solved.

The application provides an electrically-controlled beam scanning leaky-wave antenna and a communication device. The leaky-wave antenna comprises a gap waveguide including a strip-shaped ridge, the gap waveguide being used for transmitting electromagnetic waves in the form of a traveling wave, the strip-shaped ridge being arranged in the gap waveguide along a transmission direction of the electromagnetic waves; and a plurality of radiation units arranged on a side wall of the gap waveguide, each of the radiation units comprising a radiation slot and an electrically-controlled switch, the radiation slot being used for leaking electromagnetic waves in the gap waveguide to a free space to form a beam, and the electrically-controlled switch being used for controlling an operating state of the radiation slot to realize beam scanning. The leaky-wave antenna provided by the application can improve the beam tilting characteristics of the antenna and improve the communication quality of the antenna.

The application provides a leaky-wave antenna array based on a multimode substrate integrated waveguide coupler, relates to the technical fields of wireless communication and radar, and comprises a dielectric substrate, a multimode substrate integrated waveguide coupler and two leaky-wave antenna units. The multimode substrate integrated waveguide coupler is integrated on the dielectric substrate and is configured to excite modes and modes of the substrate integrated waveguide respectively in the same frequency range, generate even-mode signals with equal amplitude and in-phase and odd-mode signals with equal amplitude and opposite phase. The two leaky-wave antenna units are symmetrically arranged on the two sides of the upper surface metal layer of the dielectric substrate and are connected with two output ports of the multimode substrate integrated waveguide coupler respectively. The two leaky-wave antenna units are configured to radiate a wave beam and a difference wave beam in response to the even-mode signals and the odd-mode signals. The application solves the problem of low measurement accuracy of a traditional single-pulse antenna, has the technical effects of simplifying the design of a feed network, improving radiation performance and thus improving measurement accuracy.

The invention discloses an ultrahigh-scanning-rate leaky-wave antenna based on double-layer offset quasi-complementary SSPP. The antenna comprises a dielectric substrate, double-layer single-side offset quasi-complementary SSPP structures on the upper surface and the lower surface of the dielectric substrate, a double-layer mode conversion structure and a dielectric substrate top layer periodic modulation branch knot. Wherein the longitudinal symmetry axis of the dielectric substrate top layer single-side strip SSPP unit and the longitudinal symmetry axis of the dielectric substrate bottom layer single-side slot SSPP unit are relatively offset, and a double-layer single-side offset quasi-complementary SSPP unit is jointly formed; the double-layer mode conversion structure is composed of a trapezoidal gradual change structure on the top layer of the dielectric substrate and a periodic gradual change slotting structure on the bottom layer of the dielectric substrate; and the dielectric substrate top layer periodic modulation branch knot is formed by compounding a rectangular structure and a semicircular structure loaded at the tail end of the rectangular structure, and is positioned on the opposite side of the top layer single-side strip SSPP structure. The wide-angle scanning ultra-narrow band-pass filter has the advantages of wide-angle scanning, ultra-narrow working bandwidth, ultra-high beam scanning rate and open stop-band suppression, and has very high practical potential in the fields of radar, imaging and the like.

The present disclosure relates to the technical field of communications, and provides a leaky-wave antenna and an antenna system. The leaky-wave antenna comprises: a first dielectric substrate, a first metal layer, a dielectric functional layer, a second metal layer, and a second dielectric substrate. The first metal layer comprises a first transmission line and first radiation units; multiple first notches distributed at intervals are provided on a side edge, parallel to a length direction, on a first plasmon section of the first transmission line; and the multiple first radiation units and the first notches are located on the same side of the first transmission line. In the embodiments of the present disclosure, on the basis of the first plasmon section comprised in the first transmission line, the confinement capability of electromagnetic signals can be enhanced, and the radiation of the electromagnetic signals can be reduced, thereby ensuring the transmission efficiency of the electromagnetic signals, and achieving compact design of leaky-wave antennas. In addition, by radiating antenna signals outward from the first radiation units, high gain of the antenna signals can be ensured while maintaining high transmission efficiency in the first transmission line.

The invention discloses an electrically-controlled beam scanning leaky-wave antenna and communication equipment, belongs to the technical field of antennas, and is used for solving the problems that an existing antenna is complex in structure and the beam scanning angle is limited under a fixed frequency. The electrically controlled beam scanning leaky-wave antenna comprises a gap waveguide and a plurality of radiation units. The gap waveguide comprises a cover plate and a metal bottom plate which are oppositely arranged, and a ridge structure arranged on the upper surface of the metal bottom plate in the transmission direction of the electromagnetic waves, and the gap waveguide is used for transmitting the electromagnetic waves in a traveling wave mode; the plurality of radiation units are sequentially arranged on the cover plate along the extension direction of the ridge structure; each radiation unit comprises a radiation patch, two radiation slots and two electric control switches which are sequentially arranged from top to bottom, and the radiation slots and the electric control switches are distributed in a central symmetry manner relative to the radiation patch; and each electric control switch is used for controlling the working state of the corresponding radiation slot so as to regulate and control the radiation phase of the radiation unit and realize beam scanning.

The invention provides a leakage cable, which comprises an inner conductor and an insulator, and is characterized in that the insulator sleeves the outer side of the inner conductor; the outer conductor sleeves the outer side of the insulator, the outer conductor is provided with a plurality of leakage grooves and a plurality of leakage holes along the axis direction of the leakage cable, the leakage grooves and the leakage holes all penetrate through the side wall of the outer conductor, the leakage grooves are of strip-shaped structures, and the leakage grooves and the leakage holes are arranged crosswise along the axial direction of the leakage cable. By applying the technical scheme of the invention, the problems of high standing wave performance and limited application bandwidth of the leaky cable in the prior art can be solved.

An antenna assembly is provided. The antenna assembly includes a ceramic carrier having a first surface and a second surface, the second surface being opposite the first surface. The antenna assembly further includes an antenna pattern. The antenna pattern includes a first antenna portion positioned at least partially on the first surface of the ceramic carrier. The antenna pattern further includes a second antenna portion comprising a plurality of conductive vias extending through the ceramic carrier from the first antenna portion to the second surface of the ceramic carrier.

The utility model provides a leaky coaxial cable assembly, an antenna system and a base station, relates to the technical field of communication, and aims to solve the problem of poor signal coverage capability of the leaky coaxial cable assembly. The leaky cable assembly provided by the utility model comprises a leaky cable and a power amplifier, the power amplifier is connected between a first section of cable and a second section of cable of the leaky cable, and the power amplifier is used for amplifying signals transmitted between the first section of cable and the second section of cable; the end, away from the power amplifier, of the first cable is in feed connection with a communication system, and the first inner conductor or the second outer conductor is in power supply connection with the power amplifier. In the leaky cable assembly provided by the utility model, the power amplifier can amplify the signal to make up the loss of the signal when the signal is transmitted in the leaky cable, and in addition, the power supply of the power amplifier can be transmitted through the first section of cable, so that the power supply of the power amplifier by using an additional cable can be avoided; and the laying difficulty of the leaky coaxial cable assembly can be reduced.

The utility model relates to a high-gain dual-polarized waveguide slot antenna array, and belongs to the technical field of radars. Comprising a horizontally-polarized antenna and a vertically-polarized antenna which are arranged in a staggered mode, the horizontally-polarized antenna is composed of a horizontally-polarized radiation waveguide, a horizontally-polarized rectangular power dividing waveguide and a feed waveguide, and the horizontally-polarized radiation waveguide is located above the horizontally-polarized rectangular power dividing waveguide and connected with the horizontally-polarized rectangular power dividing waveguide through a transition waveguide; the feed waveguide is mounted on the lower side of the horizontal polarization rectangular power division waveguide; the vertical polarization antenna is composed of a vertical polarization radiation power division waveguide, a vertical polarization rectangular power division waveguide and a feed waveguide, the vertical polarization radiation power division waveguide is located above the vertical polarization rectangular power division waveguide and connected with the vertical polarization rectangular power division waveguide through a transition waveguide, and the feed waveguide is installed on the lower side of the vertical polarization rectangular power division waveguide. According to the utility model, the feed waveguide and the radiation waveguide are integrally processed in a mode of stacking multiple layers of waveguides; the waveguide feed network is used for feeding, and has remarkable advantages compared with a traditional micro-strip or strip line network.

The application discloses a variable-beam control method of a variable capacitance diode-based element grating leaky-wave antenna, and comprises the following steps: S1, researching and analyzing an ultra-grating beam conversion mechanism; researching the mechanism of a planar ultra-grating under anisotropic, uniform and continuous periodic boundary conditions; S2, according to the ultra-grating, researching a transmission mode and optimization design of a Floquet-Bloch theorem; researching an FB mode, and eliminating the bad FB mode by designing a tool for ultra-grating parameters; S3, analyzing and designing the ultra-grating leaky-wave antenna; researching the analytical field and current of the synthesized ultra-grating in the framework of the leaky-wave antenna, so as to customize the performance of phase, beam shape and polarization; S4, designing and analyzing an electrically-tuned beam control ultra-grating leaky-wave antenna; the application adopts the variable-beam control method of the variable capacitance diode-based element grating leaky-wave antenna, adopts a simple structure of a tunable material to tune an efficient structure platform, and lays a road for a new generation of efficient special gratings.

This invention provides an artificial surface plasmon full-space beam scanning leaky antenna, comprising a dielectric substrate. The upper and lower surfaces of the dielectric substrate form a top layer and a bottom layer, respectively. The top layer of the dielectric substrate has a balun structure, an artificial surface plasmon strip group, and several metal stubs. Balun structures are symmetrically arranged at both ends of the artificial surface plasmon strip group. Several metal stubs are periodically arranged and symmetrically arranged on the upper and lower sides of the artificial surface plasmon strip group. The artificial surface plasmon strip group includes a pair of slidingly symmetrical artificial surface plasmon strips. This invention enables continuous scanning of the main beam from back-firing to front-firing, possessing full-space beam scanning capability. It has advantages such as small bandwidth occupation, high radiation efficiency, high directivity, high gain, low profile, and relatively small overall size, and can be applied in wireless communication fields such as automotive radar.

To provide an irreversible transmission line having a two-dimensional structure and capable of uniformly distributing an electromagnetic field in a two-dimensional plane.SOLUTION: An irreversible transmission line includes first and second transmission lines that are orthogonal to each other by configuring basic cells having two transmission line portions that are orthogonal to each other and have parallel branch circuits so as to be juxtaposed and cascaded in orthogonal first and second directions. The transmission line part at a position other than an intersection point of the first and second transmission lines is formed of a material magnetized by spontaneous magnetization or the like so as to have gyro anisotropy by being magnetized in a different direction with respect to a propagation direction of a microwave. In a dispersion curve indicating a relationship between an operating frequency of a microwave signal input to each transmission line and a propagation constant of each transmission line, at least one of the parallel branch circuits of each transmission line is configured such that a wave component propagating along each of the parallel branch circuits in a longitudinal direction of each transmission line has an irreversible characteristic and is asymmetrical with respect to the transmission line portion.SELECTED DRAWING: Figure 5

communication system arranged in a housing and comprising several communication devices (2, 4) that communicate wirelessly with each other, wherein - the multiple communication devices include a specific communication device that is arranged on a mounting surface (501); - the specific communication device has at least one antenna structure, and the at least one antenna structure contains at least one antenna (21, 41); - the at least one antenna structure is arranged between the mounting surface and a predetermined wall surface (301) of the enclosure (200), and the predetermined wall surface is one of the wall surfaces of the enclosure; - which has at least one antenna structure with an outer shell; - a gap between the outer shell of the at least one antenna structure and the predetermined wall surface of the housing is smaller than a wavelength of a radio wave used in the wireless communication of the multiple communication devices; and - the at least one antenna of the specific communication device has a directional effect in a direction parallel to the mounting surface.

The invention provides a leakage cable for suppressing a high-order mode based on symmetrical slotted holes, which comprises an inner conductor, an insulating layer, a conductor layer and an outer ring sleeve which are sequentially and coaxially nested from inside to outside, and is characterized in that a plurality of slotted hole groups are formed in the conductor layer and are distributed along the circumferential direction of the conductor layer; each slotted hole group comprises a plurality of slotted hole arrays which are arranged at intervals in the axial direction of the conductor layer, each slotted hole array comprises a plurality of >-shaped first slotted holes and a plurality of <-shaped second slotted holes, and each first slotted hole and each second slotted hole are respectively composed of two rectangular grooves. By applying the technical scheme of the invention, the problems of high-frequency attenuation and unstable signal transmission of a leaky cable in a high-frequency band in the prior art are solved.

A shield is provided for an antenna, the shield including a plurality of rods, each rod having at least an external surface made from an electrical conducting material, the rods being in parallel spatially spaced relationship one to another, the rods each having a respective curved transverse cross-section. Also provided is an antenna installation, including an antenna and such a shield. The antenna has a forward antenna face for emitting and / or receiving electromagnetic radiation. The shield is spaced forward of the forward antenna face by a forward spacing.

In a general aspect, a communication system comprises a first station and a second station. Each station includes a transceiver and a control subsystem. The transceiver includes having one or more photonic crystal masers and one or more photonic crystal receivers. The control subsystem includes one or more lasers optically coupled to the one or more photonic crystal masers and the one or more photonic crystal receivers. The control subsystem also includes modulation electronics in communication with the one or more lasers and configured to control one or more properties of a first input optical signal received by each photonic crystal maser. The control subsystem additionally includes demodulation electronics in communication with the one or more lasers and configured to control one or more properties of a second input optical signal received by each photonic crystal receiver.

To provide an antenna that obtains large radiation power, achieves desired directivity, and uses a coaxial cable, and a communication system that includes the antenna.SOLUTION: An antenna 10 includes an inner conductor 21, outer conductors 220, 221, and 222, and a plurality of slits 241, 242, and 243. The outer conductors are arranged along the extension direction of the inner conductor and are spaced apart from the inner conductor in the circumferential direction of the inner conductor. A plurality of first slits is formed independently of each other at positions that are spaced apart from each other in the extension direction of the outer conductors.SELECTED DRAWING: Figure 1

The present invention discloses a dielectric rod antenna based on a hybrid radiation mode and a design method thereof, comprising: a ceramic dielectric rod and a dielectric-filled rectangular open waveguide, wherein the dielectric-filled rectangular open waveguide comprises a rectangular metal open waveguide, the open waveguide is filled with a dielectric, and a matching section of the ceramic dielectric rod is embedded in the filling dielectric; an inner conductor portion of a coaxial probe is inserted into the filling dielectric, and the coaxial probe is perpendicular to the transmission surface of the rectangular metal open waveguide; in the antenna structure, the dielectric-filled rectangular open waveguide not only serves as a waveguide feeding structure, but also participates in radiation as an open waveguide antenna, and both the open waveguide antenna and the dielectric rod antenna are end-fire radiation modes; and in the low-frequency band, the antenna structure uses open waveguide radiation as the main radiation mode, and the ceramic dielectric rod is used to improve radiation directivity.

A metamaterial filtering antenna includes a host waveguide, a plurality of metamaterial resonant elements, a feed port, and a radiation port. The plurality of metamaterial resonant elements are arranged inside the host waveguide. Each of the plurality of metamaterial resonant elements are electromagnetically coupled to at least one adjacent metamaterial resonant element by being placed at a subwavelength distance from at least one adjacent metamaterial resonant element. The feed port is coupled to a first side of the host waveguide and is configured to couple a radiofrequency (RF) signal to the host waveguide. The radiation port is coupled to a second side of the host waveguide and is configured to receive an electromagnetic wave from the host waveguide and radiate the electromagnetic wave to outside the metamaterial filtering antenna. The electromagnetic wave is generated by the plurality of metamaterial resonant elements through filtering the RF signal.

To provide an antenna device which widens an angle of radiation directivity of a radio wave while suppressing an increase in size, and improves a gain of the radio wave in an orthogonal direction.SOLUTION: An antenna device includes an element surrounding portion made of a dielectric material and including a quadrangular prism-shaped recessed portion defined by a bottom surface on which a radiating element is disposed and four side surfaces surrounding the radiating element when viewed in a direction orthogonal to the bottom surface, and a ground layer disposed on a side opposite to the bottom surface. And a power supply unit that supplies power to the radiating element, wherein at least a part of each of two side surfaces facing each other along a deviation direction from the center to the position among the side surfaces is covered with a metal layer.SELECTED DRAWING: Figure 1

In a general aspect, a communication system comprises a first station and a second station. Each station includes a transceiver and a control subsystem. The transceiver includes having one or more photonic crystal masers and one or more photonic crystal receivers. The control subsystem includes one or more lasers optically coupled to the one or more photonic crystal masers and the one or more photonic crystal receivers. The control subsystem also includes modulation electronics in communication with the one or more lasers and configured to control one or more characteristics of a first input optical signal received by each photonic crystal maser. The control subsystem additionally includes demodulation electronics in communication with the one or more lasers and configured to control one or more characteristics of a second input optical signal received by each photonic crystal receiver.