22 results about "Antenna spacing" patented technology

Provided are a method by which a first device performs wireless communication, and a device supporting same. The method may comprise the steps of: acquiring configuration information for sensing from a base station or a sensing management function (SMF); and transmitting or receiving a sensing signal on the basis of at least one antenna. For example, the at least one antenna may be on the basis of an antenna interval included in the configuration information.

Disclosed is a blood flow measurement device capable of emitting microwaves at a target blood vessel of a human body, measuring a blood flow in real time by using the microwaves reflected from the blood vessel, and adjusting, by means of a simple method, the position of the target blood vessel, which is the target of the microwaves. The disclosed blood flow measurement device comprises a probe having: a bar-shaped probe body extending in the longitudinal direction; and an antenna unit formed at one end of the probe body. The antenna unit includes: a transmission antenna for emitting microwaves at the target blood vessel in the human body; a reception antenna for receiving the microwaves transmitted from the transmission antenna and reflected by the target blood vessel; and an antenna spacing adjusting unit, which adjusts spacing between the transmission antenna and the reception antenna so as to adjust the measurement position of the blood flow to the depth of the target blood vessel for which the blood flow is to be measured.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a network node may receive signals associated with a spatially multiplexed communication having a first number of layers per polarization via a set of receive antenna groups having a first antenna pitch independent of a distance between the network node and a transmitting device. The network node may forward signals associated with spatial multiplexing communications having a second number of layers per polarization via a set of transmit antenna groups having a second antenna pitch independent of the distance between the repeater and the receiving device. Numerous other aspects are described.

A wireless communication method is disclosed. The method includes transmitting a sensing signal in a sensing mode using a first set of antennas; receiving echo signals in a sensing mode using a second set of antennas; and performing wireless communication in a communication mode using the first set of antennas and the second set of antennas; wherein the first set of antennas and the second set of antennas are different in at least one of an antenna pitch, a radio frequency, RF, a link implementation, an antenna type, or an antenna arrangement.

Multimodal radar antenna device (100, 200, 300), comprising: a transmitting antenna section (120, 220, 320) comprising a first plurality of transmitting antennas (101) configured to transmit a steerable mode signal, a second plurality of transmitting antennas (104) configured to transmit an imaging mode signal, and a third plurality of transmitting antennas (103) configured to transmit the imaging mode signal and the steerable mode signal; and a receiving antenna section (140, 240, 340) comprising a plurality of receiving antennas (102), wherein the second plurality of transmitting antennas (104) is arranged between the first plurality of transmitting antennas (101), wherein the second plurality of transmitting antennas (104) is arranged between the third plurality of transmitting antennas (103), wherein the first plurality of transmitting antennas (101) comprises a first set of steerable mode signal transmission antennas (121) with a spacing of 1.5 λ between antennas of the first set of steerable mode signal transmission antennas (121) and a second set of steerable mode signal transmission antennas (122) with a spacing of 1.5 λ between antennas of the second set of steerable mode signal transmission antennas (122), wherein the first sentence and the second sentence are arranged horizontally along an axis, and where λ is a wavelength of a signal that is sent or received by an antenna.

The invention discloses a symmetric translation co-prime sparse array design method suitable for a mixed field, and the method comprises the steps: firstly selecting U + 1 antennas, constructing a subarray 1 through sparse uniform linear arrangement at an antenna spacing V, then selecting V-1 antennas, constructing a subarray 2 through right shift after sparse uniform linear arrangement at an antenna spacing U, and finally folding the subarray 1 and the subarray 2, according to the method, the sub-array 3 and the sub-array 4 are constructed, the symmetric translation co-prime array is constructed by integrating the four sub-arrays, and the array can be higher in mutual coupling resistance and higher in parameter estimation precision under the condition that the degree of freedom of the array is equivalent to that of an existing sparse array.

A method for determining an angle of arrival at a communication device is described. The method comprises performing a message exchange between the communication device and a further communication device. The message exchange comprises receiving at least one first message associated with a first frequency at the communication device by means of a first antenna and a second antenna and receiving at least one second message associated with a second frequency at the communication device by means of the first antenna and the second antenna. The method further comprises determining the angle of arrival defined by an orientation of the communication device and a transmission direction of the message exchange, wherein the angle of arrival is determined based on the received first message and the received second message. Furthermore, a corresponding communication device is described.

The invention discloses a method for optimizing a clamping antenna system assisted multi-backscattering device symbiotic wireless network, which comprises the following steps of: realizing fair scheduling and resource allocation of a plurality of backscattering devices by introducing a time division multiple access mechanism and two configurable transmission protocols (Pinch Multiplexing and Pinch Switch); based on a penalty function method and a successive convex approximation technology, a non-convex optimization problem is converted into a solvable convex problem, and the sum rate of a backscattering system is maximized on the premise that the minimum rate of a mobile user and the antenna spacing constraint are met through joint optimization of the clamping antenna position and the beam forming vector through an analytical solution. According to the method, the transmission reliability, the calculation efficiency and the real-time performance of the system are effectively improved, meanwhile, the limitation that large-scale fading cannot be compensated by a traditional relay technology is overcome, and an efficient and flexible solution is provided for practical deployment of a symbiotic wireless network.

A MIMO radar system has a transmitting array with a plurality of transmitting antennas arranged at a distance from each other in an angle resolving direction, a receiving array with a plurality of receiving antennas arranged at a distance from each other in an angle resolving direction, an antenna spacing of one of the transmitting and receiving arrays being above the Nyquist limit for a single valued angle measurement, however an antenna spacing of the combination of the transmitting and receiving arrays being below the Nyquist limit, a control and analysis processing device configured for transmitting a transmitting signal by the transmitting array in each of a plurality of measurement periods implemented repeatedly according to a periodic multiplexing scheme, converting a signal received in a measurement period into a detection space of at least two dimensions, testing a plurality of hypotheses of a plurality valuedness against an estimate, selecting a hypothesis of the plurality valuedness with a highest quality measure for a single valued Doppler measurement, performing an independent angle estimation based on the transmitting and receiving array, merging results of the independent angle estimations into a single valued angle measurement.

A radar calibration system is set on a vehicle and includes a sensing unit and a housing. The sensing unit includes a receiving antenna array, the receiving antenna array includes at least four receiving antennas, the receiving antennas are arranged on an antenna plane and have a receiving antenna center, the distance between the receiving antenna center and the ground is greater than 40 cm, and the distance between any two adjacent receiving antennas is a receiving antenna interval, the ratio of the receiving antenna interval is 1:3:2 in sequence. The housing includes a bottom surface attached to the outer surface of the vehicle, the sensing unit is arranged in the housing, the antenna plane and the antenna plane angle of the outer surface of the vehicle are between 0 degrees and 90 degrees, and the vertical distance between the receiving antenna center and the bottom surface is less than or equal to 2 cm. Therefore, it is beneficial to reduce the sensing error caused by the virtual mirror target.

The utility model discloses a Ka frequency range antenna, belongs to the technical field of communication, and comprises 256 unit horn array antennas and an antenna carrier plate, and belongs to the field of antenna design, the unit horn array antennas are uniformly distributed on the antenna carrier plate, the spacing of the unit horn array antennas is 18.5 mm, the size of the antenna carrier plate is 300mm * 300mm * 40mm, and the antenna carrier plate is a rectangular plate. According to the utility model, the technical problems in the prior art that the maximum gain of the antenna is too small and the circular polarization axial ratio is too large are solved.

The application relates to a design method of a phase interferometer based on multiple linear polarization antennas, and belongs to the technical field of array signal processing. The application solves the problems of polarization mismatch, low robustness and low precision of polarization parameter measurement of an existing polarization interferometer. The design criteria of the linear polarization antenna spacing of the application are the direction finding precision and the phase difference measurement error. The design criteria of the polarization pointing angle of the linear polarization antenna are the super volume of the polarization parameter matrix of the receiving linear polarization antenna. Since the polarization pointing angle of the receiving linear polarization antenna of the application is varied, the polarization of the incident signal and the receiving linear polarization antenna are not all orthogonal, the polarization mismatch phenomenon is avoided, the problem that the DOA parameter cannot be estimated in an extreme case is solved, the robustness and precision of the polarization parameter measurement are improved, and more superior unblurring performance and DOA estimation precision can be obtained in a wide frequency band range. The method of the application can be applied to the design of a phase interferometer.

This invention discloses a dual-antenna GNSS-IR water level monitoring method, apparatus, device, and storage medium, relating to the field of water level measurement technology. The method involves placing a first antenna below a second antenna and using a dual-antenna receiver to receive the signal-to-noise ratio (SNR) sequences of both the first and second antennas. Based on the antenna spacing, the antenna interference phase difference is calculated. Based on the antenna interference phase difference, the interference phase of the target antenna is calculated. Based on the oscillation frequency and wavelength of the SNR sequences, the interference phase, the GNSS satellite elevation angle, and the absolute antenna altitude, the absolute altitude of the target water surface is calculated. Compared to existing technologies, this invention solves the problem of low sampling rate in traditional single-antenna GNSS-IR altimeter measurement. Furthermore, compared to dual-antenna GNSS-IR, this invention offers more stable signal tracking and lower hardware costs.

The invention provides a receiving and transmitting antenna channel measurement method, system and device and a medium, and the method comprises the steps: setting a conductor and a receiving and transmitting antenna to be in non-contact connection, and fixing the conductor and the antenna through an adjustable device; the antenna spacing is fixed, the conductor spacing is adjusted through the adjustable device, the receiving device is moved to different test positions, and test data under various working conditions are recorded and obtained; based on test data, in combination with signal transmission characteristics constrained by a free space and a conductor interface, a multi-conductor path loss model is constructed by adopting ridge regression and a least square method, and fluctuation characteristics in a signal transmission process are obtained through the multi-conductor path loss model. Through non-contact configuration of multiple conductors and the receiving and transmitting antenna, multi-working-condition data acquisition and construction of the multi-conductor path loss model, the high-frequency-band signal transmission path loss is effectively reduced, the channel characteristic prediction precision is improved, and the method is adaptive to multiple industrial scenes and has no significant system deviation.

The embodiment of the application discloses an antenna array and a radar, and belongs to the antenna design field.The antenna array comprises a transmitting antenna array and a receiving antenna array, the transmitting antenna array comprises parallel first and second arrays, the receiving antenna array comprises parallel third and fourth arrays, the first and second arrays are arranged along a first direction, a first antenna of the first array and a second antenna of the second array are aligned in position in a second direction, and the minimum distance between the first and second arrays in the second direction is greater than the sum of the sizes of the first and second arrays in the second direction, the third and fourth arrays are arranged along a third direction, a third antenna of the third array and a fourth antenna of the fourth array are aligned in position in a fourth direction, and the minimum distance between the third and fourth arrays in the fourth direction is greater than the sum of the sizes of the third and fourth arrays in the fourth direction.The embodiment of the application solves the problem of angle ambiguity when the distance between antennas is greater than half a wavelength.

The utility model relates to the technical field of antennas, in particular to a 0.02 GHz-6GHz broadband signal emission combined antenna device, which comprises an emission installation panel and nine omnidirectional antennas installed on the emission installation panel, the arrangement sequence and the spacing of the antennas are as follows: an antenna 4, an antenna 6, an antenna 2, an antenna 1, an antenna 3, an antenna 5, an antenna 7, an antenna 9 and an antenna 8 in sequence from left to right, the spacing between the antenna 4 and the antenna 6 is 5cm, and the spacing between the antenna 4 and the antenna 6 is 5cm. The distance between the antenna 6 and the antenna 2 is 10cm, the distance between the antenna 2 and the antenna 1 is 15cm, the distance between the antenna 1 and the antenna 3 is 15cm, the distance between the antenna 3 and the antenna 5 is 10cm, the distance between the antenna 5 and the antenna 7 is 5cm, the distance between the antenna 7 and the antenna 9 is 5cm, the distance between the antenna 9 and the antenna 8 is 5cm, the distance between the antennas with similar frequencies is more than 15cm, near-field electromagnetic coupling is weakened, the positions of high-frequency and low-frequency antennas are staggered, and octave interference is avoided. After optimization, the standing-wave ratio of the antenna array is reduced, and the mutual coupling strength is weakened.

The application relates to a communication coverage enhanced low-altitude aircraft path planning method, belonging to the technical field of communication, and comprising the following steps: modeling a communication system composed of a low-altitude aircraft equipped with a movable antenna and at least one base station to obtain a joint state model; establishing a discretized optimization problem with a signal-to-interference-and-noise ratio, a maximum speed of the aircraft, a moving range and speed of the antenna, a minimum antenna spacing and base station association as constraints, and minimizing a task completion time of the aircraft from a starting point to an ending point as an optimization target; adopting a selective uniform cost search algorithm to iteratively expand nodes on a discrete grid, optimizing beamforming, antenna position and base station association each time of expansion, reserving nodes meeting the signal-to-interference-and-noise ratio and having a relatively small potential task time, and outputting an optimal path to the ending point; and flying the aircraft according to the optimal path and adjusting the antenna position and the beamforming in real time to maintain link quality. The application guarantees stable communication connection under a cellular network and significantly improves trajectory planning efficiency.

The present application relates to the technical field of wireless communication, in particular to an antenna radiation and mutual coupling collaborative optimization system based on a time-domain hybrid fast algorithm. The antenna radiation and mutual coupling collaborative optimization system based on the time-domain hybrid fast algorithm is applied to a UAV group communication system, and comprises an antenna array unit, a data acquisition unit, a time-domain hybrid fast algorithm unit, a mutual coupling calculation unit, an optimization control unit and a communication coordination unit. In the present application, the three-dimensional geographic coordinates, attitude angle data and signal strength of the UAV group are acquired in real time by the data acquisition unit, and the real-time mutual coupling coefficient analysis of the mutual coupling calculation unit is combined, so that the system can dynamically perceive the formation mode change and trigger the optimization instruction, and the optimization control unit compares the preset threshold value, preferentially adjusts the node with the largest deviation degree, ensures that the antenna spacing and the radiation pattern are always adapted to the dynamic environment, reduces the mutual coupling effect, and significantly improves the communication stability.

The application discloses a high-port-isolation differential MIMO microstrip antenna and belongs to the technical field of wireless communication antennas. The antenna comprises a single-layer dielectric substrate, a metal grounding plate, a 1*2 differential MIMO microstrip radiation unit array and a port-isolation optimization structure. The radiation unit adopts a rectangular microstrip patch design. The port-isolation optimization structure inhibits electromagnetic coupling between units by etching DGS bandgap units on the grounding plate. The antenna is differentially fed through a coaxial line. The antenna spacing is only 0.06. The port-isolation degree reaches-42dB at a 5.36GHz center frequency, is improved by 32dB, the relative bandwidth is 2.22%, the E-plane cross polarization is lower than-30dB within an angle range of-60°<<60°, the in-band gain stability is greater than 6.8dB, and the radiation pattern is stable.

The application discloses a low-frequency communication anti-interference method and system, and belongs to the field of wireless communication. The method adopts an electric antenna and a magnetic antenna to realize the reception of low-frequency communication signals. Compared with the prior art which adopts multiple electric antennas and needs to maintain a certain antenna spacing to ensure spatial resolution, the method has lower requirements on the antenna spacing, and the antennas are closer to each other, thereby saving the space required for placing the antennas, and the receiving end does not need a large space to receive low-frequency signals. Moreover, the application adopts two different antennas, and the responses to near-field and far-field signals are different, so that better spatial resolution can be provided, and the effect of multi-antenna processing is better. In addition, the number of the electric antenna and the magnetic antenna in the application can be flexibly changed according to actual measurement requirements and space requirements.

The utility model discloses an antenna spacing adjusting device of a book checking robot, which relates to the technical field of robot control, and comprises a fixed frame, at least two antenna spacing adjusting assemblies, at least one antenna spacing adjusting assembly and at least one antenna spacing adjusting assembly, the antenna spacing adjusting assembly comprises a guide rail fixing piece and an antenna fixing piece; the fixing frame is fixedly connected with the book checking robot, the two side edges of the fixing frame are provided with fixing guide rails, the fixing guide rails are provided with sliding guide rails, the guide rail fixing piece is fixedly connected with the sliding guide rails, the antenna fixing piece is fixedly connected with the guide rail fixing piece, and the antenna fixing piece is provided with an antenna of the book checking robot. A lead screw motor assembly is further arranged on the fixing frame and is in transmission connection with the guide rail fixing piece. And the lead screw motor assembly is used for adjusting the position of the antenna on the antenna fixing piece by controlling the sliding of the guide rail fixing piece and the sliding guide rail on the fixed guide rail. According to the utility model, the technical problems of low working efficiency and inflexibility in use in the prior art are solved.

The invention relates to a positioning system based on a clamped antenna and an indoor positioning method thereof. The method comprises the following steps: firstly, activating a clamping antenna in a time division multiple access mode, and establishing a ranging equation by an access point according to received signal power; constructing a positioning equation set based on the measured distance between the emission source and each clamping antenna, and performing linearization processing on the positioning equation set and converting the positioning equation set into a matrix form aiming at the problem that the clamping antennas are collinear along the waveguide and a unique solution cannot be obtained by a common least square method; defining a weight matrix and solving a matrix equation to obtain the position of an emission source by considering different ranging reliability caused by distance difference between the emission source and different clamping antennas; and finally, the calculated user axis coordinates are screened, and only feasible solutions in an indoor space range are reserved, so that accurate positioning in an indoor scene is realized.