268results about "Leaky-waveguide antennas" patented technology

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.

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.

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 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 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.

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

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

Disclosed are an onboard antenna, a radio equipment and an electronic device. The onboard antenna includes a dielectric substrate, an antenna and a metal block, wherein the antenna is located on the dielectric substrate, a projection of the metal block on a plane where the dielectric substrate is located is not overlapped with a projection of the antenna on the plane where the dielectric substrate is located, the metal block is located on the dielectric substrate in a polarization direction of the antenna, and a distance between a metal edge of the metal block on a side close to the antenna and the antenna is greater than a coupling threshold. Using this onboard antenna, an influence of surface waves on the pattern can be suppressed to a certain extent by arranging the metal block, and a jitter of the antenna pattern can be reduced.

[Problem] To provide a dielectric waveguide that is capable of improving transmission characteristics for an electromagnetic wave, especially a high frequency electromagnetic wave such as a millimeter wave in a fifth-generation mobile communication system (5G) and a next generation mobile communication system (Beyond 5G) succeeding the fifth-generation mobile communication system. [Solution] Provided is a dielectric waveguide for transmitting electromagnetic waves. A cross section of the dielectric waveguide in a direction substantially perpendicular to the longitudinal direction of the dielectric waveguide is a rectangular cross section. The length of a long side of the rectangular cross section is at least 2.2 times the length of a short side of the rectangular cross section.

The invention provides a broadband horizontal polarization waveguide slot antenna array, which comprises a radiation slot layer, a slot coupling layer, a feed network layer and a standard waveguide interface, and is characterized in that the radiation slot layer is provided with 16 independent ridge waveguides, 16 V-shaped slots are cut on each ridge waveguide, each ridge waveguide is blocked by three cavity isolation walls to form four ridge waveguide sections, and each cavity isolation wall is provided with one V-shaped slot. Four V-shaped slots are distributed on each ridge waveguide section, 64 I-shaped coupling slots are formed in the slot coupling layer, the I-shaped coupling slots are located under the ridge waveguide sections, and the feed network layer adopts a flattened narrow-edge ridge waveguide design. Comprising a five-order one-to-two ridge waveguide power divider, a ridge waveguide-to-common waveguide converter, a multi-branch waveguide impedance transformer and an E-plane T-shaped joint. The antenna has the beneficial effects that the antenna is light in weight and low in profile; the antenna bandwidth is improved; the antenna structure is simple.

Slotted antenna device, comprising: a first electrically conductive component (110) with a first electrically conductive surface (110b) on a front side and a second electrically conductive surface (110a) on a back side and with at least one slot (112) extending from the first electrically conductive surface (110b) to the second electrically conductive surface (110a); a second electrically conductive component (120) on the back side of the first electrically conductive component (110), wherein the second electrically conductive component (120) has a third electrically conductive surface (120a) on the front side, the third electrically conductive surface (120a) being opposite to the second electrically conductive surface (110a); a rib-shaped waveguide element (122) on the second electrically conductive surface (110a) of the first electrically conductive element (110), wherein the waveguide element (122) has an electrically conductive waveguide surface (122a) that is opposite to the third electrically conductive surface (120a) and extends along the third electrically conductive surface (120a); and an artificial magnetic conductor on at least either the second electrically conductive surface (110a) or the third electrically conductive surface (120a), wherein the artificial magnetic conductor extends on both sides of the waveguide element (122), wherein the third electrically conductive surface (120a), the waveguide surface (122a) and the artificial magnetic conductor define a waveguide in an intermediate space extending between the third electrically conductive surface (120a) and the waveguide surface (122a); the waveguide element (122) has a first rib (122A) and a second rib (122B); one end of the first rib (122A) and one end of the second rib (122B) are opposite each other; viewed from a direction perpendicular to the waveguide surface (122a), at least one slot (112) is arranged between one end of the first rib (122A) and one end of the second rib (122B); which has at least one slot (112) through the first electrically conductive surface (110b) open to an external space and at least either a distance between the third electrically conductive surface (120a) and the waveguide surface (122a) or a width of the waveguide surface (122a) varies along a direction in which the waveguide element (122) extends.

To provide a radar antenna that has the required characteristics and performance while keeping manufacturing costs low.SOLUTION: A radar antenna includes a plurality of radiation stubs 21 that are formed on the front side of a plate-like horizontally elongated housing 2, and are groove-shaped extending approximately perpendicular to the longitudinal direction of the housing 2, and are arranged in parallel along the longitudinal direction of the housing 2, a waveguide portion that is formed within the housing 2, extends along the longitudinal direction of the housing 2, and communicates with each radiation stub 21, and a first dielectric 3 that is provided within each radiation stub 21, and is formed such that the center is thin and both ends are thick in the longitudinal direction of the radiation stub 21.SELECTED DRAWING: Figure 1

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.

Compact Direct IV Antenna. Antenna (100) comprising at least: - an electrically conductive enclosure (110) formed by a lower surface (111) surrounded by lateral edges (112) and closed by a cover (140) having a partially reflective outer surface; - a substrate (120) placed at the bottom of the enclosure on the lower surface of the enclosure; and - a radome (150) placed in the enclosure opposite the substrate and capable of protecting the antenna from temperatures exceeding 1000 °C; characterized in that the antenna also comprises a radiating element (130) placed on the substrate in the enclosure and capable of emitting a signal at at least a first frequency, and a grid (160) placed on a surface of the radome opposite the radiating element so as to form an air gap (170) between the grid and the substrate. Figure for the abstract: Fig. 1

The invention discloses a conformal leaky-wave antenna, and belongs to the technical field of microwave device communication. According to the invention, the problems of insufficient conformal adaptive capability, poor stability, poor beam scanning capability and the like of the conformal leaky-wave antenna are solved. The upper surface of the upper PI substrate is etched by flexible copper foil and is provided with a Vivaldi unit and metal branch knot combined structure periodically distributed on the outer side of an SSPP transmission line in a staggered mode, the lower surface of the lower ABS substrate is completely covered with a metal grounding layer, and a closed guided wave channel is formed. When a radio frequency signal is input from a feed port, electromagnetic waves are spread along the wave guide structure in the PI substrate, directional radiation is realized through energy leakage of periodic metal branch gaps, and meanwhile, the antenna can realize stress-free conformal on a curved surface carrier by utilizing the excellent flexibility characteristic of a PI material; and the periodic design of the radiation structure and the effect of Vivaldi coupling enable the wave beam to realize continuous frequency sweeping from-71 degrees to 42 degrees.

This application provides a resonant cavity antenna and an electronic device, and relates to the communications field. The resonant cavity antenna includes an antenna cavity, a first gap, and a feeding part. At least one edge of a first surface of the antenna cavity is parallel to a long edge of a display of an electronic device, at least one edge of a second surface of the antenna cavity is parallel to the long edge of the display, a plane on which the first surface is located intersects a plane on which the second surface is located. The first gap is disposed on the first surface and / or the second surface, and at least a part of the first gap extends in a direction of the long edge of the display. The feeding part is located inside the antenna cavity, and in contact with none of surfaces of the antenna cavity.