707results 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.

A waveguide antenna system, includes: an electromagnetic, EM, transition portion having a transition region having a signal feed interface and an open waveguide section, the EM transition portion configured to couple EM energy from the signal feed interface to a guided waveguide mode of EM energy to the open waveguide section via the transition region; and a leaky waveguide antenna portion configured and disposed to radiate electromagnetic energy received from the open waveguide section; wherein the EM transition portion is electromagnetically coupled to the leaky waveguide antenna portion, the EM transition portion being configured to support a transfer of electromagnetic energy from a signal feed structure to the leaky waveguide antenna portion.

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 belongs to the technical field of antennas, and particularly relates to a low-sidelobe X-waveband waveguide slot array antenna. The antenna comprises an antenna array plane, the antenna array plane comprises a plurality of sub-array antennas which are arranged in parallel at equal intervals, each sub-array antenna is a waveguide slot array antenna, each waveguide slot array antenna is externally connected with a TR assembly, and the center-to-center distance d1 between every two adjacent waveguide slot antennas is 16mm; according to the technical requirements, horizontal polarization is achieved in the mode that an inclined slot is formed in the narrow side of a rectangular waveguide, finally, the design of the low-sidelobe horizontal polarization waveguide slot traveling wave array antenna is achieved, and the sidelobe level in the antenna working frequency range averagely meets the design target that the sidelobe level of a transmitting pitching face is lower than-12dB, the sidelobe level of a receiving pitching face is lower than-25dB, and the sidelobe level of the receiving pitching face is lower than-25dB. According to the invention, the side lobe level of the azimuth plane is lower than-25dB, the normal transmitting gain is greater than 35dBi (full-band), the receiving gain is greater than 33.5 dBi, and the antenna has the advantages of low side lobe, high gain and narrow beam, and is suitable for being applied to an X-band radar communication system.

The invention provides an electric control beam scanning leaky-wave antenna and communication equipment, and the leaky-wave antenna comprises a gap waveguide which comprises a strip-shaped ridge, the gap waveguide is used for transmitting electromagnetic waves in a traveling wave manner, and the strip-shaped ridge extends in the transmission direction of the electromagnetic waves and is arranged in the gap waveguide; the plurality of radiation units are arranged on the side wall of the gap waveguide, each radiation unit comprises a radiation slot and an electric control switch, and the radiation slots are used for leaking electromagnetic waves in the gap waveguide to a free space to form wave beams; and the electric control switch is used for controlling the working state of the radiation slot so as to realize beam scanning. According to the leaky-wave antenna provided by the invention, the beam tilt characteristic of the antenna can be improved, and the communication quality of the antenna is improved.

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.

A leaky-wave antenna includes: first and second substrates opposite to each other; and an adjustable dielectric layer between the first and second substrates; the first substrate includes a first dielectric substrate, and first and second transmission lines on a side of the first dielectric substrate close to the adjustable dielectric layer; the first transmission line includes a first trunk line and at least one first main branch connected thereto, and a first auxiliary branch connected to the first main branch; the second transmission line includes a second trunk line and at least one second main branch connected thereto, and a second auxiliary branch connected to the second main branch; the first trunk line and the second trunk line are arranged side by side, with a first gap therebetween; the second substrate includes a second dielectric substrate and a reference electrode layer on the second dielectric substrate.

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.

The invention discloses a variable capacitance diode-based element grating leaky-wave antenna adjustable beam control method. The method comprises the following steps of S1, researching and analyzing a super grating beam conversion mechanism; a plane super grating mechanism under anisotropic, uniform and continuous periodic boundary conditions is researched; s2, carrying out the transmission mode and optimization design of the Floquet-Blocch theorem according to the super grating; the FB mode is researched, and a tool used for super grating parameters is designed to eliminate the bad FB mode; s3, analyzing and designing the super grating leaky-wave antenna; the analytic field and current of the synthetic super grating are researched in the leaky-wave antenna frame to customize the performance in the aspects of phase, beam shape and polarization; s4, designing and analyzing the electric tuning wave beam control super grating leaky-wave antenna; according to the variable capacitance diode-based element grating leaky-wave antenna adjustable wave beam control method, a high-efficiency structure platform which is tuned by a tunable material with a simple structure is adopted, and a road is laid for a new generation of high-efficiency special grating.

The present disclosure provides a wide beam radiation leakage coaxial cable, which includes an inner conductor, an insulating layer, an outer conductor and a sheath coaxially nested from inside to outside in sequence, at least two columns of slot groups are provided on the outer conductor, the columns of slot groups are distributed at different angles in the circumferential direction of the outer conductor, the included angle between two adjacent columns of slot groups is α=γ / n, where γ is the target radiation width, n is the number of columns of slot groups, each column of slot groups includes a plurality of slot arrays periodically arranged in the axial direction of the outer conductor, the pitch of each column of slot groups is the same, the pitch phase of each column of slot groups on the same leakage cable section is consistent, and each slot array includes a plurality of slots.

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.

A transmission device including: a transmission substrate for transmitting a signal, the transmission substrate including a feeding line and a capacitive coupling conductor that are provided on one side of a plate-shaped dielectric substrate and a ground conductor that is provided on other side of the dielectric substrate; and a connector for inputting and outputting a signal, the connector including an inner conductor and an outer conductor that is provided outside of the inner conductor, wherein the connector is provided on the one side of the dielectric substrate on which the feeding line and the capacitive coupling conductor of the transmission substrate are provided, and the inner conductor of the connector is connected to the feeding line, the outer conductor is connected to the capacitive coupling conductor, and the ground conductor of the transmission substrate is not connected to the outer conductor of the connector.

A module has a transmitter (Tx) antenna and a receiver (Rx) antenna. At least one of the Tx and Rx antennas has a leaky-wave antenna (LWA) array for transmitting or receiving one or more signal beams with a range resolution and an angle resolution. The LWA array has a plurality of LWAs configured as a filter bank. By using the filter bank based LWAs, the LWA array may coherently stitch or combine the individual spectrums of the LWAs to have a wide frequency-space coverage for providing improved range and / or angle resolutions.

The invention belongs to the technical field of antennas, and discloses a dual circularly polarized leaky-wave antenna based on a substrate integrated waveguide, which comprises a feed structure and a radiation structure, the feed structures are symmetrically arranged at the two ends of the radiation structure, and the feed structures and the radiation structure are substrate integrated waveguides; the feed structure is used for converting received external electromagnetic energy into guided electromagnetic waves and has the characteristic of widening impedance; wherein a gradient coplanar waveguide transmission line is designed in the feed structure; the radiation structure is used for converting the guided electromagnetic waves transmitted by the feed structure into circularly polarized electromagnetic waves in a free space; wherein a grid window leaky wave structure is designed in the radiation structure; by combining the leaky-wave antenna and the substrate integrated waveguide technology, the gradient coplanar waveguide transmission line is designed on the feed structure, and the grid window leaky-wave structure is designed on the radiation structure, so that the millimeter wave working frequency band requirement is met, and the antenna has the characteristics of wide axial ratio bandwidth, low side lobe, large scanning range, low profile and low cost.

An antenna structure is disposed on a metal case. The metal case includes a surface. The antenna structure includes a slot and a metal unit. The slot is formed on the surface along a direction. The metal unit is disposed on the metal case. The metal unit includes at least one blocking part. The at least one blocking part is in contact with the surface, extended toward and crossed over the slot to separate the slot into a plurality of slot paths.

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.

The present application provides an electronically controlled beam scanning leaky-wave antenna and a communication device. The leaky-wave antenna comprises: a gap waveguide, comprising a strip-shaped ridge, wherein the gap waveguide is used for transmitting electromagnetic waves in the form of traveling waves, and the strip-shaped ridge extends in the gap waveguide in the transmission direction of the electromagnetic waves; and a plurality of radiation units, arranged on the side wall of the gap waveguide, wherein each radiation unit comprises a radiation slot and an electrically controlled switch, the radiation slot is used for leaking electromagnetic waves in the gap waveguide into a free space to form a beam, and the electrically controlled switch is used for controlling a working state of the radiation slot so as to realize beam scanning. The leaky-wave antenna provided by the present application can improve the beam tilt characteristic of the antenna, and improve the communication quality of the antenna.

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 belongs to the field of millimeter wave point-to-point communication, and particularly relates to a broadband fixed-beam leaky-wave antenna with a filtering characteristic. The substrate integrated coaxial line transmission structure is adopted to feed the two ends of the leaky-wave structure, and the substrate integrated coaxial line transmits quasi-TEM waves and has a very weak dispersion characteristic, and the phase constant beta of the quasi-TEM waves changes slightly in a wide frequency band range, so that a fixed radiation wave beam can be obtained in a certain frequency band range; inversion signals are fed at the two ends of the leaky-wave structure so that the two wave beams can form a main wave beam, when the two wave beams deviate from the broadside to radiate by a certain angle, a wave beam with good radiation can still be formed, and therefore the bandwidth corresponding to the fixed radiation wave beam is further widened. On the basis, a plurality of radiation matching units are sequentially arranged on the metal strip in the length direction of the metal strip, so that the fixed-beam leaky-wave antenna has the characteristics that the angle of a radiation beam is kept unchanged in a relatively wide bandwidth, the gain is high, the efficiency is high and the side lobe is low.

A leaky-wave antenna device (101) is provided comprising: a partially reflective surface (2), a conductive ground plane (3), an actuator (6), and a feed array (155). The feed array (155) comprises a plurality of spaced apart feed sources (15). Each feed source (15) is arranged to couple a radio frequency input signal into the antenna (101). The partially reflective surface (2) and the conductive ground plane (3) are in a stacked arrangement and substantially parallel to one another, defining a cavity therebetween. The antenna device (101) is configured so that a beam formed by the antenna device (101) is steerable in a first direction by operation of the actuator, and in a second direction by a varying a relative phase of the radio frequency signal coupled to the cavity by each of the feed sources (15).

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.