176results about How to "Low cross polarization" patented technology

The present invention provides a new class of hybrid-mode horn antennas. The present invention facilitates the design of boundary conditions between soft and hard, supporting modes under balanced hybrid condition with uniform as well as tapered aperture distribution. In one embodiment, the horn antenna (100) is relatively simple mechanically, has a reasonably large bandwidth, supports linear as well as circular polarization, and is designed for a wide range of aperture sizes.

The invention discloses a millimeter wave folding-type reflective array antenna integrated with a plane feed source. The millimeter wave folding-type reflective array antenna is of a layered structure and is sequentially provided with a polarization grid, a reflective array and the plane feed source from top to bottom. On the basis of a plane substrate integration waveguide structure, a substrate integration waveguide gap array antenna is used as the feed source for conducting feed on folding-type reflection, phase compensation is obtained on a reflection face, spherical waves are converted to plane waves, and therefore the antenna which is high in gain and efficiency and stable in beam pointing is realized. Under the Q-LINKPAN application background and directing at the development demands of a plane-integration and miniaturized long-distance wireless communication system, the low-section antenna which is high in gain and efficiency and capable of being integrated with a plane millimeter wave circuit is realized, the millimeter wave folding-type reflective array antenna has the advantages of being simple in structure, compact in size and low in cost, and the requirements for plane circuit integration are met.

The invention relates to a broadband dual-linear polarization cone chopping groove antenna; a cone chopping groove radiating paste with a parasitic element and an inclined side is established; a series of metallic via holes are arranged at outline edges of the index line of the cone chopping groove antenna and a feed microstrip line; moreover, two linear polarized cone chopping groove antenna units are aligned according to T-shaped structure with disconnected middle part, so as to form a dual-line polarized antenna. The broadband dual-linear polarization cone chopping groove antenna has the property of wide wave beam of the broadband, and can eliminate the standing wave distorted point caused by resonance in scanning the wide angle of the broadband.

The invention belongs to the field of the antenna technology, and particularly relates to a broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on an SIW technology which can be used for various aspects, such as satellite communications, radar orientation, and synthetic aperture radar. The broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on the SIW technology comprises 5 layers of printed circuit boards and 54 integrated metal props. In five layers of the printed circuit boards, the medium of the first layer of the printed circuit board and the medium 20 of the second layer of the printed circuit board are Rohacell HF51 foams, the medium of the third layer of the printed circuit board, the medium of the fourth layer of the printed circuit board and the medium of the fifth layer of the printed circuit board are Rogers 5880 medium boards. The antenna is designed on the basis of the microstrip antenna, and the antenna is integrated with the feed and radiation. The structure is simple, and the printed circuit technology is used for producing. The broadband high-isolation low-cross-polarization dual-polarization microstrip antenna array based on the SIW technology has the advantages of low section, light weight, high precision and low cost.

The invention discloses a planar antenna for a dual-frequency millimeter wave system. The planar antenna for the dual-frequency millimeter wave system comprises a radiation plate printed at the middle of a medium plate and used for emitting or receiving electromagnetic wave energy, a symmetrical E-shaped groove arranged at the middle of the radiation plate and used for providing a current path needed for dual-frequency resonance, feed structures arranged at two sides of the radiation plate and used for providing signal feed for the radiation plate, a grounding plate arranged on the lower surface of the medium plate and used for providing grounding signals, and an antenna port arranged in the lower surface of the medium plate and used for inputting differential signals to the feed structures. The planar antenna for the dual-frequency millimeter wave system is simple in structure and convenient to popularize in millimeter wave antennas, and the directional diagram height is symmetrical at the millimeter wave frequency band.

The invention relates to one low frequency super wide band contract field source, which comprises one butterfly antenna, feedback part, two side fix metal boards and back metal board, wherein, feedback source emission part relies on butterfly antenna and the feedback part is composed of SMA joint band wire and band tank wire structure by use of variable butterfly antenna wide band property and feedback part to realize whole feedback wide band property.

The invention relates to a low-profile low-cross-polarization dual-polarized broadband antenna comprising a resonant cavity, an upper microstrip board, a lower microstrip board, four feed probes and a coaxial medium. A rectangular upper-layer copper foil paster is arranged at the middle of the top surface of the upper microstrip board; and a rectangular lower-layer copper foil paster is arranged at the middle of the bottom surface of the lower microstrip board. The four feed probes distributed in the resonant cavity uniformly enable the upper-layer copper foil paster to be transited to the bottom of the resonant cavity vertically in a feed mode and, together with the coaxial medium, form a coaxial radio-frequency connection port. And a 45-degree angle is formed between each side of the upper-layer copper foil paster and each side of the resonant cavity. The profile height of the dual-polarized broadband antenna is 0.1-0.15 lambda0, wherein the lambda0 expresses a free space wavelength of a central frequency point. Therefore, the antenna unit performance can be improved obviously and thus the work bandwidh reaches 60%. More than two low-profile low-cross-polarization dual-polarized broadband antennas are connected in parallel to form a low-profile low-cross-polarization dual-polarized broadband antenna array.

Disclosed is a differential dual-polarized dielectric resonator antenna. The differential dual-polarized dielectric resonator antenna comprises a grounding substrate, and a crossed dielectric resonator arranged on the grounding substrate, wherein the crossed dielectric resonator is equivalent to two rectangular dielectric resonators formed in an orthorhombic manner; a group of differential feed structures are arranged at the two ends of each rectangular dielectric resonator in an mirror image manner separately; and each group of the differential feed structures are electrically connected with one group of differential feed interfaces on the other surface of the grounding substrate. The differential feed way is designed on the basis of the crossed dielectric resonator; the differential feed can suppress an electromagnetic field to be in higher mode in same-phase distribution; a virtual ground formed by the differential feed can suppress influence between orthogonal modes of the two rectangular dielectric resonators which are equivalent to the crossed dielectric resonator; therefore, when a dual-polarized radiation function is realized by the orthogonal modes of the two rectangular dielectric resonators, compared with a single-end dielectric resonator antenna, the differential dual-polarized dielectric resonator antenna disclosed by the invention suppresses a part of stray pattern, remarkably improves port isolation degree and lowers crossed polarization.

The invention provides a broadband coded folded reflectarray antenna based on subwavelength single-layer reflecting units, and solves the problems that the folded reflectarray antenna is narrow in bandwidth and high in design complexity. According to the antenna in the invention, a polarized grid plate and a main array surface equal in area are vertically installed at equal interval; a feed sourceis installed in the geometrical centre of the main array surface; the main array surface in the invention is composed of two subwavelength single-layer reflecting units having 180 DEG phase difference and the same structure by periodic coded arrangement according to a classical reflection array phase theory; in the two reflecting units having the 180 DEG phase difference in the invention, one reflecting unit is the 0 reflecting unit; the other reflecting unit is the 1 reflecting unit, which is formed by counterclockwise rotation of the 0 reflecting unit in 90 DEG; the folded reflectarray antenna in the invention has the high-gain pencil beam; the design difficulty of the antenna array is reduced; the bandwidth is wide; the design complexity is low; the advantages of high gain, low loss, compact structure, low cross polarization and the like of the folded reflectarray antenna are sufficiently played; and the antenna can be applied to a high-performance communication or radar system.

The present invention provides a wide beam scanning dual-frequency dual-polarization micro base station antenna applied to 5G communication. The antenna comprises includes a first dielectric plate, asecond dielectric plate, a third dielectric plate and a feed structure in order from the top to bottom. Radiation patches are affixed to the first dielectric plate and the second dielectric plate, thefeed structure is arranged on the third dielectric plate, the first dielectric plate and the second dielectric plate are coupledly fed through the feed structure of the third dielectric plate, at thesame time, a reflective floor is under the third dielectric plate, an air layer is arranged between the first dielectric plate and the second dielectric plate, and the second dielectric plate is in direct contact with the third dielectric plate. According to the antenna of the invention, the wideband characteristic of the antenna is achieved, the bandwidth of the two ports of the antenna covers the bands of 3.3-3.69 GHz and 4.75-5 GHz respectively, the antenna can be applied to the 5G communication, the high isolation and low cross polarization performance are achieved, and a 1*4 high gain antenna array is achieved through a differential feed network.

The invention relates to a differential microstrip filter antenna fed by a balun filter. The structure uses a balun filter to generate the differential signal with filtering characteristics, which excites the differential fed microstrip antenna, and realizes the miniaturized differential fed microstrip antenna with filtering and radiation characteristics at the same time. The filter antenna has stable gain in the pass band, fast gain drop out of the pass band and good edge selectivity. In addition, the radiation pattern of the structure is symmetrical and the cross polarization can achieve -35dB. on both the E plane and the H plane.

The invention belongs to the technical field of antenna design, and discloses a truncation metasurface-loaded low-profile broadband high-gain omnidirectional surface-wave antenna. The antenna comprises a metasurface formed by m*m equivalent period patch units; the metasurface is printed on a first dielectric substrate; a circular patch and a truncation metasurface annular structure are printed on a second dielectric substrate; the truncation metasurface annular structure is loaded on the periphery of the circular patch; the first dielectric substrate is positioned above the second dielectric substrate; and the first dielectric substrate and the second dielectric substrate are isolated by air dielectric. Compared with the existing surface-wave antenna without loading the structure, the truncation metasurface annular structure converts electromagnetic energy below the circular patch into surface wave outside the circular patch, so that surface wave diffraction is increased, thereby improving the bandwidth and antenna gain; certain air dielectric exists between the dielectric substrates; and therefore, compared with the existing surface-wave antenna without loading the air dielectric structure, the circular patch can excite surface wave by air coupling, and the surface wave can be propagated along the metasurface.

The invention discloses a differential feed dual-polarization direction diagram reconfigurable antenna. The antenna comprises a medium substrate, an antenna radiation unit, a micro-strip line feed structure, parasitic units and a coaxial feed unit; the antenna radiation unit comprises a first double dipole and a second double dipole vertical to each other; four pairs of parasitic units are arranged around the antenna radiation unit; each pair of parasitic units load the switch; the micro-strip line feed structure comprises a first feed micro-strip line and a second feed micro-strip line in mutual vertical arrangement, and an intersection point is located at a center point of the medium substrate; and the coaxial feed unit performs the feeding on the antenna radiation unit. The differentialfeed structure disclosed by the invention is convenient to integrate with a radio frequency front-end. The differential feed dual-polarization direction diaphragm reconfigurable antenna has the advantages of being small in volume, light in weight and simple in structure, the polarization way of an x axle direction and a y axle direction, and the reconfigurable direction diaphragm of each of the Esurface and the F surface can be realized.

The invention discloses a micro-strip reflective array antenna, and mainly solves problems in the prior art that the structure is complicated and the bandwidth is narrower. The micro-strip reflectivearray antenna is formed by periodically arranging a plurality of horizontally and longitudinally uniformly arranged paster units. A reflecting phase of each paster unit is different, and an arrangement period D is 0.3-0.5 Lambda. Each unit successively comprises a paster (1), a medium substrate (2) and a floor (3) from top to bottom. The paster (1) uses a circular structure. The circular paster isprovided with two pairs of gaps (11). The two pairs of the gaps (11) are positioned at two ends of two mutual perpendicular diameter lines of the circle. The micro-strip reflective array antenna is capable of improving the gain bandwidth, simple in structure, smaller in cross-polarization, and good in unit frequency characteristic curve parallelism, and can be used for the electromagnetic wave regulation and control of a microwave band.