44 results about "Beam broadening" patented technology

The invention provides a method for avoiding uplink interference of an asynchronous orbit satellite to a synchronous orbit satellite based on beam broadening in combination with user migration, the interference condition is simplified, and the beam operation of the satellite is divided into three types, namely closing, size adjustment and no change; the non-synchronous orbit satellite is closed ina strong interference area, so that the interference problem of the area can be well avoided; the beam size of the non-synchronous orbit satellite is adjusted in a weak interference area, the problemof a coverage blind area caused by beam closing of the non-synchronous orbit satellite can be solved, and the method is simple and easy to implement; and migrating the users possibly causing uplink interference to the adjacent asynchronous orbit satellites based on the user migration of the beam coverage service area. According to the method, the problem of uplink interference of the asynchronousorbit satellite system to the synchronous orbit satellite system is well solved, the service quality of a user is ensured, and the method is simple and easy to implement.

The invention relates to an optimal design method of a single-aperture multi-beam antenna. The antenna includes a reflector and a feed source array. The method optimizes the shape of the reflection surface, widens the antenna beam under the premise that the side lobe rises small, and improves the performance of the antenna. The overlapping gain of the beam is improved, and the contradiction between the overlapping gain and the side lobe level of the traditional single-aperture single-feed multi-beam antenna is solved, and the index requirements of the receiving and transmitting beams are taken into account during the optimization process, and the single-aperture single-source The feed sub-beam forming method realizes a high-gain, low-sidelobe common beam for transmitting and receiving.

The invention discloses a bomb-loaded wide-beam high-gain antenna. Through the refraction effect of a dielectric plate, the antenna maintains a high gain in front and realizes a wide beam at the same time. The antenna structure is as follows: the radome contains a beam broadening dielectric plate and a radiation dielectric plate, the filling dielectric plate is located between the beam broadening dielectric plate and the radiation dielectric plate, and the side of the beam broadening dielectric plate close to the radiation dielectric plate is laid with a secondary radiation metal sheet; the radiation The side of the dielectric board close to the beam broadening dielectric board is laid with a primary radiation metal sheet, and the other side is covered with a metal floor; the primary radiation metal sheet contains a feed point; the dielectric boards of each layer are tightly pressed; the high-frequency socket is fixed at the bottom of the outer shell, The inner core of the high-frequency socket is connected with the feed point after being perforated inside the radiation medium plate. The invention improves on the basis of the "antenna lens" technology, makes the "lens" structure simple and reliable, and adapts to the requirements of the bomb use environment.

Methods for generating weights for the antenna elements (110) in an AESA antenna (100). In one embodiment, transmitting weights are selected to have unit amplitude and quadratic phase, and receiving weights are selected to provide a two-way antenna pattern which is uniform over a useful portion (300) of the main lobe, and decreases rapidly outside of the uniform portion. In another embodiment the transmitting weights have unit amplitude over a central portion of the array and the receiving weights are selected to provide a two-way antenna pattern which is uniform over a useful portion (300) of the main lobe.

The invention discloses a method for beam broadening and sidelobe suppression based on sparse constraints, which belongs to the field of antenna array signal processing for receiving wireless transmission signals, in particular, a beam broadening and sidelobe suppression method using sparse reconstruction to make the antenna array optimized method. While using the sparse constraint algorithm to realize beam broadening, a lower side lobe level can be obtained, thereby enhancing the ability to suppress interference signals. By establishing the antenna array model, determining the steering vector parameters, and then using the over-complete dictionary to represent the matrix of observation and interference direction information, and then initializing the weight vector of the beamformer, and performing sparse iteration on it, the weight vector that meets the conditions has been obtained , so that the output peak has a lower side lobe on the original basis. Compared with other algorithms, this algorithm achieves super-resolution while achieving a narrow main lobe, and improves stability while having a low side lobe.

The invention provides an information transmission method and a communication node. The method comprises the steps that a first communication node determines one or more transmitted beams according toa channel measurement result; the first communication node forms one or more first equivalent analog / digital transmitted beams based on the one or more transmitted beams; the first communication nodedetermines one or more second equivalent analog / digital transmitted beams according to the one or more first equivalent analog / digital transmitted beams; the first communication node forms an equivalent digital port based on each second equivalent analog / digital transmitted beam; and the first communication node transmits information through the equivalent digital port. On the basis of beam searching and tracking, information is transmitted selectively through beam broadening and digital domain frequency, so that the information is transmitted more reliably.

The disclosure provides a wide field of view laser signal input optical fiber apparatus and method based on a higher-order phase. The apparatus is arranged at a feeding source of an optical system andcomprises a converting device and a target optical fiber, wherein laser signals of a wide field of view insert the higher-order phase in the space through the converting device and are input to the target optical fiber, and the higher-order phase is second order and or more. A wide field of view laser signal input optical fiber method based on the high-order phase is further provided based on theapparatus. According to the apparatus and the method, the laser signals insert the higher-order phase in the space so that the laser signals of the wide field of view are input to the target opticalfiber, and the wave beam broadening function is realized.

The invention relates to a method for calculating propagation characteristics of Gaussian beams in anisotropic hypersonic plasma turbulence, and the method comprises the steps: solving long-term beam broadening and flicker indexes of the Gaussian beams in the anisotropic plasma turbulence according to a refractive index fluctuation power spectrum of the anisotropic plasma turbulence and a Rytov approximation theory; two anisotropic factors are introduced to parameterize anisotropic characteristics of a turbulence unit in horizontal and vertical directions, long-term beam broadening and flicker indexes are simulated, and finally propagation characteristic data of Gaussian beams in anisotropic hypersonic plasma turbulence are obtained. According to the method for calculating the propagation characteristic of the Gaussian beam in the anisotropic hypersonic plasma turbulence, the defect of the propagation characteristic of the Gaussian beam in the anisotropic hypersonic plasma turbulence is overcome, so that the wave propagation problem in the hypersonic plasma turbulence is not only based on isotropy, but also based on the Gaussian beam propagation characteristic in the anisotropic hypersonic plasma turbulence. And a theoretical basis is provided for an electromagnetic wave propagation problem in subsequent plasma turbulence.

A liquid crystal beam steering device and its fabrication are described. Benefits of employing beam broadening devices for controlled lighting and architectural applications include improved beam divergence control, improved beam broadening dynamic range control, beam divergence preconditioning, improved uniformity of projected beam intensity and reduced color separation of projected beams. A beam steering device with two liquid crystal orientations in the in-plane and vertically grounded states is also presented.

The invention discloses a multi-way pulse compressor and a using method thereof. The main body of the compressor comprises two end mirrors, the concave spherical surfaces of which are relatively coaxially placed; rotating rings are arranged on the end mirrors; and concave spherical reflectors are arranged in the rotating rings. Dispersion compensation film series are plated on the concave spherical surfaces of the concave spherical reflectors, and through grooves are processed on the reflectors. When the compressor is used, closed annular light spot tracks can be obtained on the concave spherical surfaces by setting and repeatedly adjusting the two end mirrors, and then discrete adjustment is implemented by rotating the compression of the rotating rings on the pulse. The compressor and the using method have the advantages that: the compressor has low loss, a compact structure and no spatial dispersion light path; the concave spherical surfaces can effectively counteract the beam broadening caused by the diffraction effect of beams so as to effectively overcome the defects of the conventional grating pair technology, prism pair technology and plane mirror-based dispersion mirror compensation technology; and the using and adjusting method is simple and convenient.