95 results about "Planar antenna array" patented technology

Improved feed line networks for antenna arrays operating at millimeter wave frequencies are provided for constructing planar antenna arrays printed on the surface of a dielectric substrate. A planar antenna array includes an array of planar radiator elements interconnected through a feed line network of planar coplanar transmission lines that enable high-efficiency operation, at millimeter wave operating frequencies. For example, a feed network may be formed with a network of coplanar strip line transmission lines including one or more coplanar strip line (CPS) and one or more coplanar waveguide (CPW) transmission line, which are interconnected using balun structures, to enable high efficiency operation at millimeter wave frequencies.

The invention provides a method for constructing a thinned MIMO (Multiple Input Multiple Output) planar array radar antenna, which is on the basis of a phase center approximation principle and combines an MIMO antenna thought. The antenna arrangement optimal design is carried out by adopting the MIMO antenna thought. When all transmitting array elements simultaneously (or in turns) transmit orthogonal signals and receiving array elements simultaneously receive echo signals, a virtual planar array with uniform intervals is subjected to equivalence processing by utilizing the phase center approximation principle. According to the thinned MIMO planar array radar antenna constructed according to the invention, few transmitting antenna array elements and few receiving antenna array elements can be adopted and the equivalent full-array-element arrangement planar antenna array is virtually realized. Compared with the planar array antenna which is the same size as the equivalent virtual planar array and is directly arranged, the thinned MIMO planar array radar antenna constructed according to the method disclosed by the invention has the advantage of greatly reducing the requirement on the number of the array elements.

A MEMS planar antenna array is provided comprising a planar field of MEMSs. A lattice of parasitic elements can be formed by selectively connecting at least one MEMS in the field. An antenna active element is formed by selectively connecting MEMS in the field. Alternately, both the parasitic elements and the active elements are formed by connecting MEMS. The parasitic elements have a number, shape, length, distance from the active element, and position with respect to the active element that are formed in response to selectively connecting MEMS in the field. Further, a plurality of different parasitic element lattices can be formed in response to selectively connecting MEMS in the field. Likewise, the active element has a length, shape, and position that is formed in response to selectively connecting MEMS. Patch, monopole, and dipole antennas are among the antenna types that can be formed from the MEMS.

The invention provides a method for monitoring the running state of a vehicle, a roadside beacon and an intelligent traffic system. The method comprises the following steps of: receiving vehicle position information transmitted by a vehicle by a roadside beacon, wherein the vehicle position information comprises the distance of the vehicle relative to the roadside beacon and the direction of a vehicle head of the vehicle; and determining the running state of the vehicle according to the distance of the vehicle relative to the roadside beacon, the direction of the vehicle head of the vehicle and the preset geographical position information of a site in which the roadside beacon is arranged, wherein the direction of the vehicle head of the vehicle is obtained according to a signal transmitted by the roadside beacon, which is received by an intelligent plane antenna array fixedly installed on a vehicular terminal. According to the technical scheme provided by the invention, the position information of the vehicle can be obtained in real time by the vehicular terminal, and the position information can also be transmitted to the roadside beacon in real time or periodically, so that the running state of the vehicle can be accurately obtained in time by the roadside beacon so as to realize the real-time monitoring of the vehicle.

In a phase-controlled antenna array for mobile devices, in particular designed for flying device, groups of controllable passive antenna elements are arranged in concentric circles around an active central antenna element. The arrangement of additional similar planar antenna arrays among the original antenna array is especially advantageous with regard to bundling the emission characteristic.

A mm-wave antenna apparatus with beam steering function that includes: a Butler Matrix feeding network; a plurality of power combiners, each power combiner having one input and N outputs, configured to apply equal phase and power to a phase distributed output signal generated by the Butler Matrix feeding network and to generate N processed signals; and a plurality of millimeter wave switched beam planar antenna arrays having at least 1.5 GHz of bandwidth and located on a top low loss dielectric substrate, each antenna array of N elements, configured to obtain direct and narrow width beams from the N processed signals combined by each power combiner.

The invention discloses a multi-layer planar antenna array. The multi-layer planar antenna array is characterized by comprising multiple layers of dielectric plates and interlayer metal plates, wherein each layer of dielectric plate is integrated with a double-layer feed network (including an integrated air waveguide) and one part of antenna structure separately; one interlayer metal plate coats the part between two adjacent layers of dielectric plates; the layers are coupled by using gaps; a lower layer in each double-layer feed network is an air waveguide power division network and an upper layer is an SIW feed network; and the dielectric plates and the interlayer metal plates are laminated into a complete antenna. The multi-layer planar antenna array is simple in structure; compared with the same type of products, the multi-layer planar antenna array has the advantages of being low in transmission loss, large in bandwidth, easy to process and high in gain; and the cost is reduced while the performance is kept.

The invention relates to a dual-polarization phased array weather radar. The radar comprises a waveguide slot planar antenna array which is formed by alternately configuring horizontally polarized antennas and vertically polarized antennas; a DTRU subsystem which is composed of a DTRU module and a cooling fan; a digital beam forming/signal processing subsystem which consists of a signal processingand light transmission module and a timing synchronization module; and a servo subsystem, a frequency source and distribution network subsystem and a monitoring subsystem, thereby achieving multipleworking mode requirements of double-transmitting and double-receiving, single-transmitting and double-receiving, and single-transmitting and single-receiving of the whole system. The working requirements of pitching dimensional phase scanning and single/multi-beam receiving can be met, weather target information can be rapidly detected, and occurrence and development of disastrous weather such asrainstorm, hail and tornado can be effectively monitored; meanwhile, dual polarization has good performance of quantitatively measuring echo intensity, and large-range rainfall can be quantitatively estimated; fixed-point, quantitative and timing rainfall forecasting is realized, and reliable and scientific detection data is provided for military and civil meteorological guarantee.

The invention discloses a channel state information transmission method, user equipment and a base station in an MIMO system. The method comprises the steps that according to obtained CSI of a channel, a first precoding matrix and a first PMI which correspond to each other are found in a first codebook layer of a planar antenna array, wherein the first PMI is the PMI of the first precoding matrix; according to the CSI and the first PMI, a second precoding matrix and a second PMI which correspond to each other are found in a second codebook layer of the planar antenna array, wherein the second PMI is the PMI of the second precoding matrix; the first PMI and the second PMI are reported to the base station. The first codebook layer of the planar antenna array is obtained by conducting direct product operation on first codebook layers of linear arrays in the x-axis direction and the y-axis direction of the planar antenna array, and the x-axis and the y-axis are straight lines where two perpendicular sides of the planar antenna array are located. According to the channel state information transmission method, the user equipment and the base station in the MIMO system, the precoding performance of the system is improved, and effective CSI feedback and precoding operation are provided for a large-scale antenna system.

The invention discloses a simple and compact wide-stop-band filtering patch antenna. The simple and compact wide-stop-band filtering patch antenna comprises a dielectric substrate and a metal floor which are arranged at an interval up and down and a metal probe; a radiation patch is arranged in the middle of the upper surface of the dielectric substrate; the radiation patch is provided with an open ring-shaped gap; a U-shaped branch is arranged on the lower surface of the dielectric substrate; the open ring-shaped gap and the U-shaped branch are consistent in opening direction and are both ofa symmetrical structure about a y-directional central axis of the dielectric substrate; one end of the metal probe is concentric with a round hole formed on the metal floor to form a coaxial feeding structure; and the other end of the metal probe is connected with the radiation patch after sequentially passing through an intersection of the metal U-shaped branch and the y-directional central axisand the dielectric substrate. The simple and compact wide-stop-band filtering patch antenna is simple in structure; a volume of a radio frequency front end can be greatly reduced and no additional insertion loss is generated; filtering performance can be implemented under a compact high-gain structure; and the simple and compact wide-stop-band filtering patch antenna is easy to machine, low in cost, small in volume and more suitable for planar antenna array design and large-scale production.

The invention relates to a planar antenna array of an Ka frequency band. The planar antenna array comprises a first-layer waveguide power distribution network, a second-layer waveguide power distribution network, and loudspeaker radiators, wherein the first-layer waveguide power distribution network and the second-layer waveguide power distribution network are formed by cascading a plurality of waveguide E-face T-shaped structures, the number of the loudspeaker radiators corresponds to that of the waveguide E-face T-shaped structures, each waveguide E-face T-shaped structure is provided with two output ends, each loudspeaker radiator is provided with two input ends, and the two waveguide input ends of each loudspeaker radiator are connected with output ports of each waveguide E-face T-shaped structure of the e first-layer waveguide power distribution network and the second-layer waveguide power distribution network. The planar antenna array has the advantages of high efficiency, low profile, high gain, narrow beam, easiness to process, wide frequency band and the like.

A waveguide fed planar antenna array with enhanced circular polarization (“WFAECP”) is disclosed. The WFAECP includes a plurality of dielectric layers forming a dielectric structure, an inner conductor formed within the dielectric structure, a first patch antenna element (“PAE”), a second PAE, a bottom and top conductor, a conductive via in signal communication with the bottom and top conductor, a first and second antenna slot within the first PAE and second PAE, and a waveguide. The dielectric layers includes top and bottom dielectric layers, where the top dielectric layer includes a top surface and the bottom dielectric layer includes a bottom surface. The first PAE is formed on the top surface of the top dielectric layer and the second PAE is formed on the bottom surface of the bottom dielectric layer. The waveguide includes a waveguide wall, backend, and cavity. The second PAE is located within the waveguide cavity.

The invention discloses a non-reflective back board and large-caliber spoof surface plasmon polariton (Spoof Surface Plasmon Polariton, SSPP) wide-band frequency sweep planar antenna, and relates to the technical field of an antenna. The planar antenna consists of a non-reflective back board waveguide structure and a wide-band transmission type phase gradient metasurface; a long-range propagated SSPP can be generated on the non-reflective back board SSPP waveguide structure, so that the longitudinal antenna caliber of the SSPP planar antenna can be expanded; by virtue of planar antenna arraying, the transverse antenna caliber of the planar antenna can be further expanded; on the basis, the SSPP planar antenna with the antenna caliber of 300mm*30mm and a large-caliber high-directivity SSPPplanar antenna array with the antenna caliber of 300mm*240mm are designed; a simulation and experimental result proves that the gain of the antenna array is improved by 9.2dB on average compared withthe single SSPP antenna while the working bandwidth and the frequency sweep characteristic are basically the same as those of the single antenna; and by virtue of the non-reflective back board SSPP planar antenna designed on the basis, the invisible design of the planar antenna can be facilitated, and design of a conformal antenna can be promoted.

The invention relates to a metal cavity broadband antenna. According to the basic structure, the metal cavity broadband antenna comprises a flat-box-shaped hollow metal cavity with gaps formed in the top and a coaxial connector. The gaps formed in the upper surface of the metal cavity comprise the I-shaped gap in the middle of the top of the metal cavity, the linear gaps in the two sides of the top of the metal cavity, and technological gaps in the two sides of the metal cavity in the length direction in the shape of []. An inner conductor of the coaxial connector stretches into the metal cavity and is connected with the inner top of the metal cavity. The integrated single metal cavity structure is adopted for the metal cavity broadband antenna and thus is simple in structure, and the antenna machining difficulty is reduced. The single metal material is adopted, so that hidden danger of deformation and layer disengagement caused by different expansion coefficients of multiple materials is eliminated. Because the metal material is good in thermal conductivity and electrical conductivity, thermal control design and electrostatic protection of a satellite-borne phased-array antenna are facilitated. The metal cavity and the gaps are all made full use of, and thus the broadband performance of the antenna is achieved. The profile of the antenna is low, when the antennas are used for combining a planar antenna array, the planar antenna array is of a honeycomb structure, and the metal cavity broadband antenna has the advantage of being high in structural strength.

A terahertz focal plane array disclosed by the present invention is characterized by comprising a plane antenna array and a first lens array connected with a plane lens array. The present invention also discloses a design method of the terahertz focal plane array. The terahertz focal plane array and the design method of the terahertz focal plane array of the present invention effectively overcome the disadvantages that the field of view of a single silicon lens is smaller, and the large-scale arrays can not be realized, on the other hand, also have the advantages that the processing difficulty is low, the configuration is flexible, the array scale is not limited and the like, and have the wide application prospect in the terahertz imaging field.

The invention discloses a multi-user downlink three-dimensional statistics beam forming adaptive transmission method using channel mean information. A uniform planar antenna array is taken as a base station. The transmission method comprises the following steps: for an FDD (Frequency Division Duplex) system, each user calculates respective channel mean information, namely, a Rice factor, a channel mean vertical direction main mode and a horizontal direction main mode, by using a channel estimation result, and feeds the calculated respective channel mean information to the base station; for a TDD (Time Division Duplex) system, the base station calculates the downlink channel mean information of each user by using an uplink channel estimation result; and the base station selects a service user according to the obtained channel mean information, and performs pre-coding transmission on the service user. Through adoption of the multi-user downlink three-dimensional statistics beam forming adaptive transmission method using the channel mean information provided by the invention, the robustness of a system is enhanced effectively, and a large average mutual information amount can be obtained at low calculation complexity.

The invention discloses a method for designing three-dimensional beam forming in a multi-user 3D-MIMO system. The method comprises the following steps that first, the probability density function of the vertex angles from a base station to user direct vision diameters is calculated according to a distribution model of users in a 3D scene, and a multi-user scheduling algorithm in the multi-user 3D-MIMO system is designed according to the probability density function of the vertex angles; second, when the base station sends signals to the users, each antenna port in a configured planar antenna array serves one individual user, precodes applied to all the antenna ports are precodes suggested in the 3GPP standard, and the served users are selected from all the users through the multi-user scheduling algorithm; third, configuration of the planar antenna array of the base station is decided by the designed multi-user scheduling algorithm, an electronic downward inclination angle used in each precode applied to the corresponding antenna port is decided by the adopted configuration of the planar antenna array, and the throughput of the system is maximized finally. The method greatly improves the overall performance of the 3D-MIMO system.

The embodiment of the invention provides a channel state information feedback method and equipment thereof and relates to the field of a wireless communication system. According to the invention, the problem that a user terminal cannot feed downlink channel state information back to an emission node when an antenna of the emission node is configured to a planar antenna array in a multi-antenna transmit-receive system is solved. The method specifically contains the following steps: the user terminal US sends rank indication (RI) information and precoding type indication (PTI) information to the emission node, wherein antenna configuration of the emission node contains a planar array antenna; and precoding indication PMI information and channel quality indication (CQI) information in a first antenna direction and/or second antenna direction are sent to the emission node, wherein the first antenna direction and the second antenna direction comprise but are not limited to a horizontal direction and a vertical direction of the planar array antenna. The method provided by the invention is applied to information feedback.

The invention provides a convex optimization-based near-field array antenna pattern synthesis method. The method comprises the following steps of: 1, determining a shape of a main lobe, a position range in which minor lobe control needs to be carried out, and a peak minor lobe level; 2, establishing a radiation model of a radiation near-field region on the basis of a point focusing antenna array;and 3, establishing a convex optimization model and solving motivation of the antenna array. The method has the advantages of generating radiation near-field regions into patterns with any shape and controllable minor lobes and being high in calculation speed, and can be used for optimum design of near-field planar array antennas.

The invention provides a planar antenna array. The planar antenna array comprises multiple open waveguide units and waveguide signal transmission channels; each signal transmission channel is equipped with a multi-stage one-to-two power distribution network, and adopts a reflective structure which consists of multiple slowly-changed stage structures and slowly-changed stages; the open waveguide units, waveguide openings, a first polarized selection cavity, a second polarized selection cavity, a first polarized connecting opening, and a second polarized connecting opening are combined with multiple stage structures and interference convex structures, so as to effectively realize impedance conversion and impedance matching and expand frequency band bandwidth; in addition, the requirement on the manufacturing precision is relatively low, and the manufacturing cost is even lower; in addition, the invention provides a polar antenna with a polarization regulation function on the basis; the polar antenna comprises the polar antenna array with the above-mentioned structure, and a polarization regulation apparatus; the polarization regulation apparatus comprises a polarization synthesizer and a polarization receiving-transmitting device, wherein the common ports of the polarization synthesizer and the polarization-taking device are directly connected; and the polarization-taking device rotates along an axial line, and realizes dual-polarization receiving-transmitting and sharing through a minute quantity of microwave reactive devices.