44 results about "Beam broadening" patented technology

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.

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.