48results about How to "Narrow beam width" patented technology

A multiple beam antenna system is described. The system may include a mounting structure, a first wireless access antenna, a second wireless access antenna, and a radio frequency lens. The first and second wireless access antennas may be mounted to the mounting structure. Columns of radiating elements of the first and second wireless access antennas may be aligned with the radio frequency lens. The radio frequency lens may be modular in a longitudinal or radial direction, or in both directions. The radio frequency lens may include a plurality of compartments arranged to form a first cylinder made up of concentric, coaxial cylinders and a plurality of dielectric materials in at least some of the plurality of compartments.

A device for detecting an azimuth has a transmission array antenna having plural transmission antenna elements arrayed along an array axis and a receiving array antenna having plural receiving antenna elements arrayed along the array axis. A reception signal is acquired for each of channels by transmitting and receiving a search wave through each of the channels. The channels are arbitrary combinations of each of the transmission antenna elements and each of the receiving antenna elements. A first spatial frequency analysis is performed along the array axis of either ones of the transmission antenna elements and the receiving antenna elements using the reception signal. A second spatial frequency analysis is then performed along the array axis of the other ones of the antenna elements using results of the first spatial frequency analysis. An azimuth of a target is determined based on analysis results from the second spatial frequency analysis.

A patch antenna is provided with a metallic wall (1); a patch conductor (4) formed on a printed board (2), i.e., a dielectric substrate, by etching or the like; and a power feeding means for the patch conductor. The metallic wall (1) is bent forward along the both side surfaces of the printed board (2). The metallic wall (1) is inclined inward, and an interval between the both end portions is smaller than a radiation aperture dimension of the patch antenna when viewed from an antenna radiation direction. With such configuration, a directional beam width can be widened, and the directional beam width on a surface parallel to the polarization surface of linearly-polarized wave and the directional beam width on a surface orthogonally intersecting with the polarization surface of the linearly-polarized wave are accorded with each other.

The invention discloses a space-based step frequency time-sharing angle measurement radar spatial non-cooperative target imaging method. Aiming at the problem of high-resolution imaging of a spatial high-speed non-cooperative target through a space-based step frequency time-sharing and difference angle measurement radar, by reasonable radar parameter design and signal flow design, a target tracking algorithm is embedded in an imaging algorithm, the time-sharing sum/difference narrow beam radar two-dimensional tracking imaging function can be realized by utilizing a set of transmitting signal timing sequence, and the imaging of a space target beyond the range of radar beams in the imaging process is realized.

The invention provides an antenna array and an antenna. The antenna array comprises first column elements and second column elements which are arranged side by side. The first column elements comprise at least one first radiation unit. The second column elements comprise at least one second radiation unit. The antenna array also comprises at least one microwave network. The microwave network is provided with two input port and two output ports. The two input ports are mutually isolated and accessed to a feed phase shift network. The two output ports are respectively connected with the first and second radiation units in the same horizontal direction, and the signals of which the range of the phase difference value is between +/-45 degrees can be outputted to the first and second radiation units at the two output ports when the electric signals are inputted from any one input port of the microwave network. With application of the scheme, narrowing of wave beam width can be realized when the physical size of the antenna is narrowed so that the gain of the antenna can be enhanced, and the miniaturization design of the antenna can be realized.

This invention relates to a monolithic folded F-P cavity used for semiconductor laser, which is composed of a monolithic optical element. The monolithic optical element is made of the material having low propagation loss for a certain spectrum range. Light entering through an input/output coupling surface of the monolithic optical element is reflected several times between the input/output coupling surface and at least two high reflection surfaces within the monolithic optical element, and then at least one part of the light exits through the input/output coupling surface along the path which is collinear with the incident light but in an opposite direction. By means of integrating reflecting and coupling parts of the folded F-P cavity within a single monolithic optical material, this invention greatly improves the reliability of the F-P cavity, and has other advantages, such as insensitive to outside interferences, smaller size, simpler structure and easy usage. A semiconductor laser using the monolithic folded F-P cavity is also provided.

The invention discloses a Ka-band standing wave type series-fed microstrip line array antenna, a Ka-band standing wave type series-fed microstrip area array antenna and manufacturing methods thereof.The microstrip line array antenna comprises a dielectric substrate, a ground layer, a main feed line, a feed line and a series-fed microstrip line array. The main feed line and the series-fed microstrip line array are both connected to the upper surface of the dielectric substrate. The ground layer is connected to the lower surface of the dielectric substrate. The series-fed microstrip line arraycomprises a first impedance transform matcher and a plurality of array elements. The microstrip area array antenna includes a dielectric substrate, a ground layer, a main feed line, a plurality of second impedance transform matchers, and a plurality of series-fed microstrip line arrays. The main feed line, the plurality of second impedance transform matchers and the plurality of series-fed microstrip line arrays are all connected to the upper surface of the dielectric substrate. The ground layer is connected to the lower surface of the dielectric substrate. One end of the series-fed microstripline array is open-circuited, and the other end of the series-fed microstrip line array is connected to the main feed line through the second impedance transform matchers. The incident wave and the reflected wave are superimposed on the main feed line to realize standing wave transmission. The antenna structure is simplified by using the compact structure and simple design of the series-fed network.

The invention provides a base station antenna, which comprises at least one radiating element (120), a reflecting plate (110) and a function board, wherein the reflecting plate (110) is arranged on one side of the at least one radiating element (120) and is used for reflecting electromagnetic wave; the function board and the reflecting plate (110) are respectively arranged on two sides of the at least one radiating element (120); the function board comprises multiple micro-structure units (220). According to the base station antenna provided by the invention, the function board with a conductive geometric structure is arranged, so that the antenna gain can be increased.

Examples disclosed herein describe an antenna with antenna elements that may be selectively activated and deactivated to define active apertures. The active apertures may be of different shapes and sizes. An antenna may include one active aperture or multiple active apertures at a point in time. These one or more active apertures may be reconfigured, e.g., by deactivating the active antenna elements and activating other antenna elements.

The invention discloses a dual-polarized broadband antenna array with a high-isolation suspended microstrip line for balanced feeding. The antenna array mainly comprises an antenna body and a feed network for feeding the antenna body, the antenna body is formed by arranging a plurality of antenna units. The antenna unit comprises an upper dielectric plate, a middle dielectric plate, a lower dielectric plate, a first polarization coaxial probe and a second polarization coaxial probe. A radiation patch is printed on the upper surface of the upper dielectric plate and is connected with the firstpolarization coaxial probe and the second polarization coaxial probe, and a grounding reflection plate is printed on the lower surface of the lower dielectric plate. Compared with the prior art, the dual-polarized broadband antenna array has the advantages of high isolation, the high gain and the wide impedance bandwidth.

The invention discloses a radar adaptive sidelobe cancellation algorithm and an adaptive sidelobe cancellation system. A radar adaptive sidelobe cancellation system comprises a main channel and a plurality of auxiliary channels. A main channel signal is weighted by a main antenna and then synthesized, is used for determining the target direction, and has the characteristics of strong directivity, narrow beam width, low sidelobe level and the like. Auxiliary channel signals are independently sent in by auxiliary antennas, the auxiliary antennas are low-gain omnidirectional antennas, and the gain of the auxiliary antennas is equivalent to the minor lobe level of the main antenna. When a desired signal and interference simultaneously arrive at the main and auxiliary antennas, a desired signal component in each auxiliary channel is far smaller than a desired signal component in the main channel, and the interference amplitude is roughly equivalent. If real-time weighted summation is carried out on the auxiliary channels to compensate for the fixed phase difference caused by the wave path difference between the main channel and the auxiliary channel, and then subtraction operation is carried out on the output of the main channel, interference can be cancelled in a self-adaptive mode.

The invention belongs to the technical field of antennas, and particularly relates to a Ka-band high-gain substrate-integrated waveguide ripple antenna and system. The antenna comprises a dielectric layer, a first metal layer and a second metal layer, wherein the first metal layer is attached onto an upper surface of the dielectric layer, the second metal layer is attached onto a lower surface ofthe dielectric layer, a through hole is formed in each of the first metal layer and the second metal layer, the shapes of the through holes are same, the vertical positions of the three through holesare corresponding to each other, a plurality of hollow concentric rings are arranged on the first metal layer, a metal via hole structure is arranged on the dielectric layer, and the first metal layercommunicates with the second metal layer by the metal via hole structure. The invention also provides an antenna system. The antenna system comprises a matched waveguide, a standard rectangular waveguide and the antenna, wherein the matched waveguide is connected with the second metal layer, and the standard rectangular waveguide is connected with the matched waveguide. The antenna has the advantages of high gain, wide bandwidth, narrow E-surface and H-surface main lobe beam width, low cross polarization and the like.

The invention discloses an antenna with an adjustable wave width. The antenna comprises a switch device, a radiation device and a phase shifter; the switch device comprises a first input branch, a second input branch, a first output branch, a second output branch and a switching switch component; the radiation device comprises a first radiation unit and a plurality of second radiation units; eachsecond phase-shifting output port is connected with each second radiation unit in a one-to-one correspondence mode; the output port of the first output branch is connected with the input port of the phase shifter, and the input port is connected with the output port of the first input branch through the switching switch component; the output port of the second output branch is connected with the first radiation unit, and the input port is connected with the output port of the second input branch through the switching switch component; the input port of the second input branch is connected witha first phase-shifting output port; and the output port of the first input branch is connected with the input port of the second output branch through a switching switch component. Therefore, the beam width of the antenna vertical plane can be changed, and the requirements of different coverage scenes can be met.