11 results about "Beam matching" patented technology

This invention discloses a low-energy beam transmission line, comprising: a single solenoid having a channel; a first movable component connected to the single solenoid to allow the single solenoid to move along the beam transmission direction; and a vacuum accelerating tube, with a first end connected to an ion source and a second end passing through the channel and connected to an accelerator. This invention's low-energy beam transmission line, by incorporating a movable single solenoid, increases the adjustable degrees of freedom of the solenoid, enabling dual-degree-of-freedom adjustment (spatial position and magnetic field strength), thus significantly improving beam matching capability.

The application discloses a kind of ultra-short bending type beam homogenization transmission lines, its characteristics are: the transmission line is the ultra-short bending type strong current homogenization transmission line containing two four-eight level composite iron and a two level iron;The ultra-short bending type strong current homogenization transmission line is the ultra-short bending type strong current homogenization transmission line A arranged along the beam direction, or the ultra-short bending type strong current homogenization transmission line B arranged along the beam direction: the ultra-short bending type strong current homogenization transmission line A is sequentially provided with: accelerator exit, beam matching mechanism, four-eight level composite iron 1, two level iron, four-eight level composite iron 2, beam matching and homogenization effect observation mechanism 1, terminal 1 along the beam extraction direction;The four-eight pole composite iron of the beam line can simultaneously realize the focusing and homogenization effect to beam envelope, and the composite iron is installed on the beam transmission line, which can reduce the number of transmission elements, shorten the length of transmission line, and reduce the engineering cost of beam transport line.

The invention provides an angle domain codebook design method and device based on power weighting GMM (Gaussian Mixture Model) clustering, and relates to the technical field of wireless communication multi-antenna transmission, and the technical key points are as follows: the method comprises the following steps: obtaining path parameters containing angle and power information, and generating a power weighting angle training set; carrying out probability density modeling on the angle training set by adopting a Gaussian mixture model, and identifying an optimal number of angle clusters; based on the weight of each angle cluster, distributing the total code word number as the exclusive code word number of each cluster in proportion; aiming at each cluster, determining a beam direction reference by using a cluster mean value, optimizing direction precision in combination with a main feature vector of a cluster covariance, and generating an exclusive code word direction corresponding to each cluster; integrating the code words of all clusters, and constructing a final codebook; wherein in the codebook generation process, quantized resources are allocated through beam geometric features, and more quantized resources are concentrated in a high-energy region of an angle domain. According to the embodiment of the invention, by adopting the design, the beam matching precision can be improved.

The invention relates to a proton spectrum CT imaging method and device, and the method comprises the following steps: receiving two proton beams with different energies through two beam matching units, and adjusting the phase space and beam envelope of the proton beams; the transmission angle of the proton beam is changed by using the beam deflection system, so that the proton beam is deflected to irradiate the target substance; performing position angle sorting and filtering on the proton beam through an imaging optimization system; receiving the dual-energy proton beam by using a single-source double-layer detector, collecting energy attenuation data of the dual-energy proton beam, and transmitting the data to a data analysis module; the data is compared with the energy spectrum line of a known substance through the data analysis module, the equivalent base substance proportion of a target substance is calculated, the energy difference is processed through an algorithm, and a low-noise and high-contrast energy spectrum image is generated. According to the proton spectrum CT imaging method, quantitative and qualitative analysis can be carried out on the tissue structure components of the target substance, and the imaging quality can be improved.

The present application belongs to the field of satellite communication and wireless communication resource management, and discloses a maritime satellite uplink robust beamforming method and related device, which determines the geometric angle relationship and constructs the uplink robust beamforming optimization problem by acquiring the attitude, position and satellite parameters and other information of the ship terminal, and then models it as a heterogeneous decentralized partially observable Markov decision process, integrates historical beam decision to handle partial observability, and trains a robust heterogeneous cooperative QMIX model to realize decentralized beam decision of the ship and the satellite based on local observation. The method can realize the optimization of the transmitting and receiving beams with low signaling and computing overhead, effectively suppress multi-user interference, improve beam matching accuracy and link stability, and ultimately enhance the transmission reliability and system capacity of the maritime uplink.

The application discloses a kind of omni-directional intelligent metasurface assisted MIMO integrated system transmission beamforming method, for simultaneously realizing line-of-sight target detection and non-line-of-sight multi-user communication.By introducing STARS into MIMO integrated transmission system, using its independent control ability to reflected signal and transmitted signal, additional signal path is provided for beamforming, and non-line-of-sight link is constructed for communication users to guarantee service quality.The matching error between radar expected power pattern and actual pattern is used as the objective function, and block coordinate descent combined with alternating direction penalty method and distance optimization algorithm is used for solving.The application realizes full space coverage, while ensuring the quality of communication service, compared with conventional intelligent metasurface assisted MIMO integrated system, has better beam matching performance.

The application discloses a super-short symmetrical bending type beam homogenization transmission line, which is a symmetrical bending type strong current homogenization beam line containing two pieces of four-eight level composite iron and one piece of shared two level iron; the symmetrical bending type strong current homogenization beam line is composed of one shared beam line and two branch beam lines; the shared beam line is provided with an accelerator exit, a beam matching mechanism, four-eight level composite iron 1 and two level iron along the beam direction; the first branch beam line is sequentially provided with four-eight level composite iron 2, a beam matching and homogenization effect observation mechanism 1 and a terminal 1; the second branch beam line is sequentially provided with four-eight level composite iron 3, a beam matching and homogenization effect observation mechanism 2 and a terminal 2; the four-eight level composite iron of the beam line can simultaneously realize the focusing and homogenization of the beam envelope, the composite iron installed on the beam transmission line can reduce the number of transmission elements, shorten the length of the transmission line and reduce the engineering cost of the beam transmission line.

A substrate inspection apparatus includes a light source unit, a pulsed beam matching unit, a substrate support unit, an incidence angle adjusting unit, and a detecting unit. The light source unit emits first and second laser beams. The pulsed beam matching unit matches the first and second laser beams to superimpose a pulse of the first laser beam on a pulse of the second laser beam in time and space. The incidence angle adjusting unit adjusts angles of incidence of the matched first laser beam and second laser beams to irradiate the first laser beam and the second laser beam on the substrate, and mixes the first and second laser beams to generate an evanescent wave on the substrate. The evanescent wave generates scattered light due to a defect of the substrate. The detecting unit detects the scattered light generated due to the defect of the substrate.

The invention discloses an unmanned aerial vehicle ad hoc network safe and efficient transmission method based on beam matching, and belongs to the technical field of unmanned aerial vehicle ad hoc network safe communication. The method is suitable for a wireless ad hoc network of a plurality of AAVs (Autonomous Aerial Vehicles). Each AAV is in a fixed area, realizes information transmission through a uniform linear array, and is provided with a special receiving antenna. According to the method, first-class high-priority private information and second-class low-priority public information are superposed at the same time during signal transmission. According to the method, a legal receiving end meeting a privacy rate threshold value is preferentially screened, and beam forming and power distribution design are combined, so that private information forms an orthogonal complementary space in the eavesdropper direction, and sensitive data leakage is effectively prevented. The low-priority signal transmission rate is further optimized, and the network information throughput rate is maximized. Multi-node cooperation or an additional interference source is not needed, and the safety, efficiency and real-time adaptive capacity of an unmanned aerial vehicle network are remarkably improved.

The application discloses a kind of ultra-short linear beam homogenization transmission line, the linear type high-current homogenization beam line is sequentially provided with: accelerator exit, beam matching mechanism, four eight-pole composite iron 1, four eight-pole composite iron 2, beam homogenization effect observation mechanism, terminal along the beam direction;The four eight-pole composite iron 1 and four eight-pole composite iron 2 are used to generate four-pole magnetic field and octupole magnetic field respectively, so that only one transmission element can realize the role of four-pole iron and eight-pole iron simultaneously;The four eight-pole composite iron 1 and four eight-pole composite iron 2 are based on a four eight-pole composite magnet system.The application solves the problem that the place where the envelope of the prior art is maximum is usually occupied by four-pole magnetic field, and the role of eight-pole iron cannot be fully played;Solve the problem that the beam envelope is small at the position of the existing eight-pole iron, which makes the field intensity requirement of eight-level magnet very high and difficult to realize in engineering;Solve the problem that the length of beam line is too long, resulting in large floor area and high cost.

This invention provides a channel access mechanism design based on joint directional LBT and beam training. First, during the channel listening phase, the transmitter and receiver utilize directional LBT and auxiliary LBT techniques to accurately filter out idle beam sets. When no idle beam sets are found, the system continues scanning and listening to find available idle beam sets. Then, the beam training phase begins, using RST / CTS signaling to complete beam training between the transceiver and receiver. During beam training, the transmitter alternately transmits RTS in the idle beam sets, and the receiver records the RSRP value of the received RTS for each beam; simultaneously, the transmitter receives CTS and records the RSRP value. Based on the beam training results, an improved Gale-Shapley algorithm is used for beam pair matching: a beam preference list is established, and the results are output through greedy matching iterations, prioritizing beam matching between the transmitter and receiver based on high RSRP values ​​and large beam capacity, selecting the optimal beam pair to achieve communication between the transmitter and receiver.