562results 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 invention belongs to the field of wireless communication, and particularly relates to a low-loss leaky coaxial cable and a manufacturing method thereof. The leaky coaxial cable comprises an inner conductor, a composite insulating layer, an outer conductor and a sheath layer which are coaxially arranged in sequence, and each layer forms a concentric cylindrical structure by taking an axis as a center. The outer surface of the inner conductor and the outer surface of the outer conductor of the leaky coaxial cable are respectively roughened, so that the contact between the inner conductor and the insulating layer and the contact between the outer conductor and the sheath layer are improved, meanwhile, a solid inner skin layer originally used for bonding the inner conductor and the insulating layer is omitted, the signal transmission performance is improved, and the service life of the leaky coaxial cable is prolonged. And the transmission loss is reduced. Compared with an existing product, the leaky coaxial cable with the surfaces of the inner conductor and the outer conductor, provided by the invention, has the advantages that the attenuation index is integrally optimized by 2.6%-5.8% under multiple frequency bands of 900 MHz to 2700 MHz on the premise of meeting the test requirements of adhesive force, standing wave and insulating dielectric strength between the insulating layer and the inner conductor.

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 discloses a multi-mode circularly polarized OAM (orbital angular momentum) filtering antenna based on an artificial surface plasmon. According to the antenna, the SSPP leaky-wave antenna and the HMSIPW filter are integrated, so that efficient emission of multi-mode OAM beams is realized, and the antenna has low axial ratio, high gain and good directional diagram matching performance; the SSPP leaky-wave antenna is composed of an Archimedes spiral line type SSPP waveguide and annularly distributed patches, wherein the SSPP waveguide realizes accurate regulation and control of dispersion characteristics through the combination of periodic sawtooth comb lines and uniform spiral lines; the HMSIPW filter is composed of a dielectric substrate layer, a metalized through hole and a gradient rectangular structure, impedance matching of a micro-strip and double lines is achieved, insertion loss is reduced, and radiation performance is improved. Compared with a traditional design, a filtering function is integrated, higher harmonic radiation and low-purity high-mode OAM are inhibited through the overall design, and selectivity and radiation energy uniformity are improved.

The invention belongs to the technical field of wireless communication, and particularly relates to a self-repairing radio frequency coaxial cable, a leaky coaxial cable and a manufacturing method thereof. On the basis of meeting the standard of the communication cable, the technical problems of electrical performance deterioration, reliability reduction and service life reduction caused by micro damage of the foaming insulating layer in the use process of the cable are further solved. Tests show that the self-repairing technology provided by the invention is suitable for a mobile communication radio frequency coaxial cable and a leaky coaxial cable (the frequency range is 0.1 GHz-6 GHz). According to the HLRCTYZ-50-22 leaky coaxial cable in the YD / T2491 standard and the HCTAYZ-50-22 radio frequency coaxial cable in the YD / T1092 standard, when the voltage standing wave ratio is smaller than or equal to 1.20 and the characteristic impedance meets 50 + / -2 ohms, the MTBF (average fault-free time) of the leaky coaxial cable and the HCTAYZ-50-22 radio frequency coaxial cable can be improved by 20%-40% compared with that before improvement.

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 belongs to the technical field of wireless communication, and more particularly relates to a low-loss high-power radio frequency coaxial cable and leaky coaxial cable, the radio frequency coaxial cable comprises an inner conductor, an insulating layer, an outer conductor layer and an outer sheath layer from inside to outside, and by optimizing the structures of the insulating layer and the conductor, the overall thermal resistivity of the cable is improved, and the overall performance of the cable is improved. And the attenuation performance of the cable and the heat resistance in a high-power application scene are improved. Compared with a high-power cable with a conventional structure, the attenuation test value of the radio-frequency coaxial cable under the specification of 3 / 8 inches is optimized by about 15% compared with the requirement on the premise of meeting the 125 DEG C temperature resistance grade; on the premise of meeting the 105 DEG C temperature resistance grade, the attenuation test value of the leaky coaxial cable under the 1 / 2 inch specification is optimized by about 17% compared with the standard requirement.

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.

A dual-frequency and dual-circularly-polarized transmit-array antenna with independently controllable beams includes a planar broadband circularly polarized feed array and a planar transmit-array, the planar broadband circularly polarized feed array being placed near a focal plane of the planar transmit-array. The planar broadband circularly polarized feed array includes K-band left / right-handed circularly polarized feeds and Ka-band left / right-handed circularly polarized feeds that are integrated in the same plane. The planar transmit-array includes K-band and Ka-band dual-circularly-polarized phase shifting cells that are periodically staggered in a shared-aperture manner and based on an architecture of receiving antenna-phase shifting stripline-transmitting antenna. The antenna realize independent adjustment of right-handed and left-handed circularly polarized transmit phases in the K-band and the Ka-band, and it possesses the advantages such as miniaturization, low profile, and easy integration, and so on, thus having significant application prospects in fields such as satellite communications.

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.

A switchable dual-polarized patch antenna with improved cross-polarization isolation for simultaneously radiating horizontally and vertically polarized signals is described. A planar conductor is arranged with first and second terminals spaced apart vertically on a portion of the planar conductor, radiating a vertically polarized signal component with a 0-degree phase shift from one of the two terminals and a vertically polarized signal component with a 180-degree phase shift from the other of the two terminals. A hybrid coupler can provide the 180-degree phase shift. The horizontally polarized signal is radiated from a third terminal spaced apart horizontally on another portion of the planar conductor and coupled to a horizontally polarized signal source. The direction of the 180-degree phase shift for the first and second components of the vertically polarized signal is selectable. The direction of the phase shift for the horizontally polarized signal is also selectable.

The embodiment of the invention provides a leaky-wave antenna and communication equipment, and aims to improve the communication performance of the leaky-wave antenna. According to the leaky-wave antenna provided by the invention, a waveguide structure comprises a plurality of transmission channels, a plurality of gaps are formed in a grounding layer in an array manner, each row of gaps corresponds to one transmission channel, a plurality of radiators are provided, and each radiator corresponds to one gap; the number of the variable impedors is multiple, each variable impedor corresponds to one gap and is located on the side, facing the transmission channel, of the gap, one end of each variable impedor is grounded, and the other end of each variable impedor is connected with one bias line. The variable impedor connected with the bias line can be controlled through the bias line so as to control the radiator corresponding to the variable impedor to emit signals outwards; and each variable impedor is connected with one bias line, so that each radiator can be independently controlled, the beam formed by each transmission channel can be independently controlled, and the communication performance of the leaky-wave antenna is improved.

A linear chirp radar system, apparatus and method use a radar control processing unit to control an LFM radar front end which includes a frequency-scanning transmit antenna and a frequency-scanning receive antenna which respectively sweep a transmit and receive energy focus across an angle space with each linear chirp signal, where the radar control processing unit processes digital output signals generated from target return signals received in response to transmitted linear chirp signals and extracts target range-angle information by applying time-frequency analysis processing to the digital output signals to generate a first range-angle map which includes range-biased angle information, and then applying a group delay compensation process to generate a second range-angle map which includes target range-angle information that is generated by selectively adjusting the range-biased angular information in the first range-angle map with an angular adjustment.

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 ridge portion satisfies the conditions for manufacturing by diffusion bonding, and a high-gain waveguide slot array antenna with a beamforming function is provided. [Solution] A waveguide slot array antenna in which multiple waveguide slot subarrays are arranged in parallel, each of which is a waveguide with a rectangular cross-section surrounded by two opposing wide walls and two opposing narrow walls that connect the two wide walls and are narrower than the wide walls, and which has multiple slots provided in one of the wide walls, a ridge portion provided in the other wide wall, and a first matching element on the other wide wall, of the same thickness as the ridge portion, connecting the ridge portion and the narrow walls.

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.

The invention belongs to the technical field of communication transmission cables, and particularly relates to a high-temperature-resistant low-loss radio frequency coaxial cable, a leaky coaxial cable and a manufacturing method thereof. The invention provides a radio frequency coaxial cable and a leaky coaxial cable. The radio frequency coaxial cable comprises an inner conductor, an insulating layer, an outer conductor and a sheath which are sequentially arranged from inside to outside. By optimizing the structure and the insulation process of the coaxial cable, the radio frequency coaxial cable and the leaky coaxial cable with excellent heat resistance can be prepared, meanwhile, the attenuation value is reduced, and stable operation of the coaxial cable under high power is facilitated. On the premise of meeting the requirements of standing wave test and time domain fault point test, namely under the condition of excellent heat resistance, compared with the existing product, the 2700MHz attenuation test value of the radio frequency coaxial cable manufactured by the invention can be optimized by about 22.6%, and the 2700MHz attenuation test value of the leaky coaxial cable can be optimized by about 14.7%.

Two novel designs for ultrathin flexible bi-directional leaky-wave antennas (LWA) are proposed and experimentally verified. Both designs are based on microstrip technology and use a periodic antipodal Vivaldi array to emit side-fire radiation beams. The first design utilizes a single feed to achieve bi-directional radiation, while the second uses two feed lines. Each design was tested for two broadside frequencies, 5.5 GHz and 6 GHz, for a total of four antennas. The designs are verified in full-wave simulations using HESS before being fabricated using a thin polyethylene terephthalate (PET) sheet substrate and kapton sheets. The fabricated antennas show high gain, high directivity, and acceptable reflection characteristics. The antennas can be engineered to point high-gain beams in multiple desired directions and can be further adapted to allow for precision control of the beams in various frequency bands.

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.

A multi-layer waveguide comprising at least three physical layers assembled into a multi-layer waveguide. The layers are a top layer, one or more intermediate layer, and a bottom layer. The multi-layer waveguide further comprises a waveguide channel being an elongated aperture in at least one intermediate layer. At least one layer has a metasurface on a first surface facing a first adjoining layer, wherein the metasurface surrounds the elongated aperture and comprise thick and thin sections.

A microstrip antenna includes a dielectric substrate, a ground electrode provided on a first surface of the substrate, an antenna element including a plurality of radiating elements on a second surface of the substrate opposite the first surface so as to extend parallel to one another and a connecting element provided on the second surface to extend in a direction intersecting with the radiating elements and connect the radiating elements, a feed line including a first end portion connected to a portion of the endmost radiating element in plan view, where the portion is located on an extension of the connecting element, and a second end portion provided on a side surface of the substrate between the first and second surfaces to receive power, and a connection line including a section located on the side surface along the feed line and connecting the endmost radiating element to the ground electrode.

The waveguide antenna device includes a first circuit board including a first integrated circuit configured to output a first transmission signal and receive a first reflection signal; and a first waveguide disposed on the first circuit board and configured to guide the first transmission signal and the first reflection signal. The first waveguide includes a first separating pipe configured to guide the first transmission signal in a first direction and in a second direction different from the first direction and a first receiving pipe configured to guide the first reflection signal received in the first direction to the first integrated circuit.