43results about How to "Improve cross polarization" patented technology

A chip integrated waveguide feeding print antenna is composed by a chip with its two metal sides being transfixed with metal through holes in array. The two metal sides are in axial symmetry. There is an intergrading section to one side of the waveguide centerline on two surface of the chip linking with transmission line. To the outer end of the intergrading section links a vibrator antenna. To the opposite side of the intergrading section on the waveguide links a micro-strip intergrading commutator linking with micro-strip transmission line.

A multiple mode feed horn is provided for transmitting and receiving signals. The feed horn includes a transverse electric throat section, a transverse electric profile section, and a transverse electric aperture section. The transverse electric profile section propagates a first transverse electric (TE) mode. The transverse electric aperture section propagates a second TE mode. The multiple mode feed horn prevents propagation of traverse magnetic modes from said throat section to said aperture section.

A chip integrated waveguide feeding print antenna is composed by a chip with its two metal sides being transfixed with metal through holes in array. The two metal sides are in axial symmetry. There is an intergrading section to one side of the waveguide centerline on two surface of the chip linking with transmission line. To the outer end of the intergrading section links a vibrator antenna. To the opposite side of the intergrading section on the waveguide links a micro-strip intergrading commutator linking with micro-strip transmission line.

A ball (1) for use in a sporting activity can comprise a body having an electrical circuit (21) on a flexible substrate (20) received therein. The electrical circuit (21) comprises a dipole antenna (26) integrally formed with the electrical circuit (21) on the flexible substrate (20). The dipole antenna can comprise two arms (23, 24) each folded in a semi-circular shape.

The embodiment of the invention discloses a dual-polarization array antenna unit. The dual-polarization array antenna unit comprises a plurality of radiation units, a first polarization feed network and a second polarization feed network, wherein the first polarization feed network and the second polarization feed network are correspondingly connected with the radiation units respectively. A plurality of feed ports, connected the radiation units, of the first polarization feed network are first feed ports and a plurality of feed ports, connected with the radiation units, of the second polarization feed network are second feed ports, wherein the adjacent first feed ports are connected in a constant-amplitude same-phase feed mode and the adjacent second feed ports are connected in a constant-amplitude reverse-phase feed mode. The embodiment of the invention further discloses a low-profile high-isolation MIMO antenna composed of the dual-polarization array antenna unit. The dual-polarization array antenna unit and the low-profile high-isolation MIMO antenna have the advantages that the overall peripheral size can be effectively reduced, the manufacturing technology is simple and cross polarization and isolation can be effectively improved.

The invention provides a multi-beam antenna comprising a reflection plate, three or more columns of parallel low-frequency arrays fixed on the reflection plate, and frequency selection surfaces arranged on all axes of the low-frequency arrays or / and arranged at the two sides along the extending directions of the low-frequency arrays. Low-frequency radiating units of each two columns of low-frequency arrays are staggered. Therefore, on the premise that the miniaturization is guaranteed, the isolation and cross polarization between the low-frequency radiating units are improved and the performances of the antenna are enhanced; and objectives of simple structure and low cost are achieved.

The invention discloses a differential Quasi-Yagi antenna with a filtering function. The differential Quasi-Yagi antenna with the filtering function comprises a substrate, wherein the substrate comprises an upper layer, a lower layer and a middle layer, the upper layer and the lower layer are both formed by microwave medium chips, and the middle layer is formed by prepregs. The differential Quasi-Yagi antenna with the filtering function further comprises a director (11), a radiating element (12), a reflector (13), a filter (14) and a transition structure (15). The differential Quasi-Yagi antenna with the filtering function has the advantages that the filtering function and the radiating function are integrated on the premise that the original size of the antenna is not increased, the structure is compact, cross polarization performance is high, and loss is low.

The invention discloses a dual-polarization vibrator which comprises vibrator radiating surfaces, a first printed circuit board and a metal supporting piece. The vibrator radiating surfaces are fixed to one end of the metal supporting piece. A gap is formed between every two adjacent vibrator radiating surfaces for feed to form a dipole. The first printed circuit board is fixed to the vibrator radiating surfaces. A feed network is formed on the first printed circuit board and comprises a first feed circuit and a second feed circuit, wherein a feed bridge skips the first feed circuit and the second feed circuit in a crossed mode. The feed network feeds electricity to the feed gaps through the first feed circuit and the second feed circuit. The first feed circuit and the second feed circuit are respectively provided with a feeder line connecting point connected to a feeder line. According to the dual-polarization vibrator, the gap feed mode is adopted, the size of an antenna at a lower-frequency stage is smaller, the height of the antenna at the lower-frequency stage is smaller, the frequency bandwidth of the antenna is greatly expanded, and key performance indexes such as the standing-wave ratio, isolation, the front-to-rear ratio and cross polarization of the antenna are improved.

The invention provides an anti-radiation anticorrosive coating and a preparation method thereof. Melamine formaldehyde resin and arachidonic acid modified epoxy resin are used as film-forming substances, organic modified nano powder is used as an auxiliary material, the organic modified nano powder is prepared by mixing three-dimensional flower-like cobaltosic oxide and spiral carbon nanofibers toreact to obtain nano powder, and loading polyaniline on the surface of the nano powder to obtain the anti-radiation anticorrosive coating. And the obtained coating product has excellent radiation resistance and corrosion resistance, and is particularly suitable for related products of electrical equipment.

The invention discloses a base station antenna used for high-frequency decoupling. The base station antenna comprises a vibrator radiation surface and a supporting surface; the vibrator radiation surface is formed by upper and lower layers of copper surfaces in a perpendicularly crossed and connected manner; the copper surfaces are provided with radiation blades; the radiation blades are providedwith filtering networks; one end of the supporting surface is fixed on a fixed point of the vibrator radiation surface; and the fixed point is a perpendicularly crossed and combined crossed point of the upper and lower layers of copper surfaces, so that the low-frequency broadband frequency is realized while influence on high frequency from low frequency is reduced; and meanwhile, by virtue of a slotting mode in the upper half section of a supporting surface balun, crossed polarization of a low-frequency low end is improved, and the radiation efficiency is not influenced.

The invention provides a wave beam shaping method for a base station antenna, and the method comprises the steps: enabling corresponding array elements of two antenna arrays at different channels to achieve the wave beam overlapping through a weak coupling bridge, wherein the four ports of the weak coupling bridge are respectively connected with feed cables of the two antenna arrays and the corresponding array elements of the two antenna arrays, thereby forming two-element subarrays; enabling the array element at the other channel to feed weak electric signals through coupling ends for excitation when the weak coupling bridge is employed for the wave beam shaping of the two-element subarrays and one channel is a use channel; enabling the array elements at the other channel to be overlappedwith corresponding array elements in a main feed column at the use channel through wave beams, thereby achieving a needed horizontal half-power angle. The method creatively proposes a mode of building grouped two-element subarrays through the weak coupling bridge, and achieves the needed horizontal half-power angle through the optimization of the combination configuration scheme of the two-element subarrays. The method remarkably improves the consistency of the horizontal half-power angle, enlarges the design section of the horizontal half-power angle, and improves the front-to-rear ratio andcross polarization of an antenna to a certain extent.

The invention discloses a high-gain automobile millimeter wave radar array antenna. The high-gain automobile millimeter wave radar array antenna comprises a millimeter wave radar chip interface, a first receiving linear array antenna, a second receiving linear array antenna, a third receiving linear array antenna, a fourth receiving linear array antenna, a transceiving isolation linear array antenna, a first transmitting linear array antenna, a second transmitting linear array antenna, a third transmitting linear array antenna and a fourth transmitting linear array antenna. The core architecture of the high-gain automobile millimeter wave radar array antenna adopts a four-transmitting and four-receiving antenna array mode, adopts eight angle-feed array elements with same phase and same amplitude as a transmitting unit, and combines a combination method of tangential circular polarization and surface slotting of a symmetrical structure to reasonably suppress the sidelobe level of the antenna, control the size and the position of an antenna parasitic unit, optimize the radiation characteristic of the antenna and improve the impedance matching characteristic. The high-gain automobilemillimeter wave radar array antenna has the advantages of high precision, high response speed, high resolution, high stability, miniaturization and low cost, and can be used for medium-distance and long-distance detection millimeter wave radar system schemes.

The invention relates to a small compass B1 frequency band micro-strip center-fed antenna. The antenna comprises a metal radiation unit, a dielectric substrate, a ground plane, a feed port and a probe; the metal radiation unit is installed on the upper surface of the dielectric substrate, the ground plane is installed on the lower surface of the dielectric substrate, the feed port is installed onthe lower surface of the ground plane, feed points are arranged in the metal radiation unit, the dielectric substrate and the ground plane, the probe is connected with the metal radiation unit throughthe feed port, and a probe feed circuit is formed; the metal radiation unit comprises a corner square metal patch, a U-shaped resonant tank is formed in the middle of the corner square metal patch, the center of the U-shaped resonant tank is consistent with the center of the corner square metal patch, the probe is located in the center of the corner square metal patch. Accordingly, the B1 frequency band of a compass system can be completely covered, the structure is simple, the return loss is low, arraying is conducted easily, and due to the fact that the center feed structure is introduced,the antenna obtains low cross polarization and high axial ratio beam width.

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 high gain T-shaped probe feed millimeter wave patch antenna. The high gain T-shaped probe feed millimeter wave patch antenna comprises a first medium substrate, wherein the first medium substrate is provided with a T-shaped probe, a first radiation patch, a second radiation patch, a first coplanar waveguide transmission wire and a second coplanar waveguide transmission wire, the T-shaped probe comprises a horizontal patch and a vertical metal through hole, the horizontal patch, the first radiation patch and the second radiation patch are arranged on a front surface of the first medium substrate, distances between the horizontal patch and the first radiation patch and the second radiation patch are identical, the first coplanar waveguide transmission wire and the second coplanar waveguide transmission wire are arranged on a back surface of the first medium substrate, and the vertical metal through hole is arranged at a center of the horizontal patch and sequentially penetrates through the horizontal patch, the first medium substrate and the first coplanar waveguide transmission wire. The high gain T-shaped probe feed millimeter wave patch antenna is advantaged in that an excellent radiation directional diagram is realized, a stable and relatively high gain is realized in the whole work frequency band, and simple design, small volume, low cost and good characteristics are realized.

The invention discloses an array antenna for an automobile radar sensor, and the array antenna comprises a millimeter wave receiving and transmitting chip bonding pad, a first receiving linear antennaarray, a second receiving linear antenna array, a third receiving linear antenna array, a fourth receiving linear antenna array, a first transmitting linear antenna array, a second transmitting linear antenna array, and a third transmitting linear antenna array. The core architecture of the array antenna adopts a three-transmitting four-receiving antenna array mode, and adopts ten in-phase non-equal amplitude angle feed array elements as a basic unit structure to control the size and position of an antenna parasitic unit, reasonably suppress the sidelobe level of the antenna and optimize theradiation characteristics of the antenna. The impedance matching characteristic is improved by combining a combination method of tangential circular polarization and surface slotting of a symmetricalstructure . According to the scheme, high precision, high response speed and high resolution can be achieved, and a millimeter wave radar system scheme for medium-distance and long-distance detectioncan be achieved.

The present invention relates to an in-service reconfigurable antenna reflector comprising a rigid support and a membrane, deformable and having radio-electric reflectivity properties. According to the invention, the reflector comprises a plurality of coupling means connecting the rigid support and the membrane, comprising a first link of finger ball joint type connected to the rigid support, and a second link of finger ball joint type connected to the membrane. Each coupling means furthermore comprises a linear actuator, comprising a rotary motor and a screw-nut assembly, connected to the two links of finger ball joint type, and able to generate, in an operational configuration, a translational motion allowing the deformation of the membrane.

The invention discloses a millimeter wave radar array antenna which a one-to-twelve input power division matching network and first to twelfth angular feeder arrays. The core architecture of the invention adopts an in-phase non-equal amplitude angle feed ten-element structure, and a corner cut circular polarization method of a symmetrical structure and a combination method of surface slotting arecombined to control the size and position of an antenna parasitic unit, the antenna sidelobe level is reasonably suppressed and the radiation characteristics of the antenna is optimized. Meanwhile, amultilayer substrate design structure and a TSV interconnection technology are utilized, the signal interference of an antenna feeder structure on an antenna resonance unit is reasonably avoided, thedielectric loss is reduced, the radar detection sensitivity and overall detection performance are improved, and circuit integration and equipment miniaturization are facilitated.

The embodiment of the invention discloses a dual-linear polarization feed source horn. The horn comprises a dual-groove corrugated horn unit, a square-to-circle transition waveguide and a quadrature coupler unit which are connected in sequence; the double-groove corrugated horn unit comprises a transmission waveguide and a double-groove feed source horn; the transmission waveguide is connected with the square-to-circle transition waveguide and the double-groove feed source horn; the quadrature coupler unit comprises a first input interface, a second input interface, a first Chebyshev transition waveguide connected with the first input interface, a first turning waveguide connected with the first Chebyshev transition waveguide through a first T-shaped junction, and a second Chebyshev transition waveguide connected with the second input interface. The second turning waveguide is connected with the second Chebyshev transition waveguide through a second T-shaped junction; and the first turning waveguide and the second turning waveguide are connected with the square-round transition waveguide through a cross rotary junction. The dual-linear polarization feed source horn is simple in structure, small in size and wide in working bandwidth, and has good cross polarization performance.

The invention provides a compact low cross polarization microstrip antenna, which comprises a dielectric plate, a radiation sheet, a metal ground, a metallized hole and a feed interface, wherein the metal ground is arranged on the lower surface of the dielectric plate, the radiation sheet is arranged on the upper surface of the dielectric plate, and the metallized hole is formed in the radiation sheet and is connected with the metal ground; an outer conductor of the feed interface is connected with the metal ground, and an inner conductor of the feed interface penetrates through the dielectricplate and is connected to the radiation sheet; the radiation sheet is provided with two gaps, and the two gaps divide the radiation sheet into three parts, namely, a first radiation sheet, a second radiation sheet and a third radiation sheet; and the first radiation sheet and the third radiation sheet are in mirror symmetry about the symmetry axis of the second radiation sheet. According to the invention, the advantages of simple and compact structure are retained, and the cross polarization of the traditional short-circuit microstrip antenna can be greatly improved. Meanwhile, compared withthe traditional short-circuit microstrip antenna, the short-circuit microstrip antenna has a smaller size and is suitable for a radio frequency front-end antenna needing low cross polarization characteristic in a wireless communication system.

The invention discloses a wall-mounted antenna, and the antenna comprises a reflection board; a high-frequency oscillator which is disposed above the reflection board, is isolated from the reflection board, and can rotate through a certain angle in the horizontal direction; a low-frequency oscillator which is disposed above the reflection board, is isolated from the reflection board, is located at a side of the high-frequency oscillator, and is far from the high-frequency oscillator; and a feed system. The system comprises a feed board which is disposed below the low-frequency oscillator; a feed network which is disposed on the upper surface of the reflection board, and comprises a feed line equipped with at least two connection points, wherein one connection point of the feed line is connected with the feed board; and at least three coaxial cables, wherein each coaxial cable is connected with the high-frequency oscillator, the low-frequency oscillator, the feed network, and one or two combiners. According to the embodiment of the invention, the antenna is good in performance, is small in size, is stable in structure, and can meet the requirements of various types of polarization modes.

The application belongs to the technical field of antenna in the communication system comprehensive design, and particularly relates to a kind of omnidirectional broadband antenna based on multimode resonance, L-shaped folded dipole, rectangular loop, U-shaped branch and SMA joint are located at the lower surface of dielectric substrate, feed line is located at the upper surface of dielectric substrate, first metallized via hole and second metallized via hole in the up-down direction are opened on dielectric substrate, the outer conductor of SMA joint is connected with the right arm of L-shaped folded dipole, the inner conductor of SMA joint is connected with one end of feed line by passing through the right arm of L-shaped folded dipole and first metallized via hole, the other end of feed line is connected with the left arm of L-shaped folded dipole by passing through second metallized via hole, the application generates new resonance frequency by bending traditional dipole to form L-shaped folded dipole;rectangular loop is added around L-shaped folded dipole, two new resonance modes are introduced, and the bandwidth of antenna is further widened.

The invention discloses a dual-frequency feed horn including a metal ring, which includes a first frequency band feed horn, a second frequency band circular waveguide, and a metal ring for impedance matching. The first frequency band is lower than the second frequency band, and the second frequency band The circular waveguide is coaxially arranged in the cavity of the first frequency band feed horn, and the signal of the first frequency band passes through the first cavity formed between the outer surface of the second frequency band circular waveguide and the cavity side wall of the first frequency band feed horn Body transmission, the signal of the second frequency band is transmitted through the inner cavity of the circular waveguide of the second frequency band; the metal ring is coaxially arranged in the first cavity for transmitting the signal of the first frequency band. The advantage of this invention is that: since the feed speakers have different index requirements, in the coaxial feed technical solution, the first cavity realizes the effective radiation of electromagnetic waves in the first frequency band, and the circular waveguide in the second frequency band realizes the effective radiation of electromagnetic waves in the second frequency band. The innovative loading metal ring in the first cavity achieves good impedance matching, thus meeting the different index requirements of the feed speaker.

The invention discloses a miniaturized 5G base station antenna. The base station antenna comprises a base plate, a plurality of radiating units fixed on the base plate and spaced apart from each other, a feeding post penetratingly mounted on the base plate for feeding, and a feed network arranged on the base plate and electrically connected with the feeding post and each radiating unit. The base station antenna of the present invention has a low height, which saves the overall space of the antenna and reduces the cost; the cross polarization is good, and the gain is high.

The present invention provides a multi-frequency dual-polarized antenna, which includes a reflector, at least one low-frequency radiation unit disposed on the reflector, and at least one high-frequency radiation unit adjacent to the low-frequency radiation unit, the high-frequency radiation An isolation frame is arranged on the periphery of the unit, and at least one layer of suspension strips is arranged above the isolation frame. The multi-frequency dual-polarization antenna of the present invention adopts a new boundary structure, the consistency of high-frequency wave width is improved, the deformation is reduced, the cross-polarization is improved, and the cross-polarization of the high-frequency pattern is significantly improved.

The invention relates to a structure and method for improving the cross polarization discrimination rate of a dual-linear polarization base station antenna. The structure comprises a radiation unit, a folding arm, a parasitic patch unit, a feed balun structure, an SMA connector, a parasitic radiation unit and a supporting structure. The radiation unit comprises two pairs of rhombic half-wavelength metal radiators which are orthogonally arranged, are supported by a dielectric plate and are fed through a quarter-wavelength balun; the folding arms are formed by vertically folding the two ends of the two pairs of rhombic radiators; the parasitic patch unit is a metal plane on the dielectric plate and is fixed at a proper position through the dielectric plate; the feed balun structure is manufactured on the dielectric plate as a feeder and is connected with the SMA connector; the parasitic radiation unit is a metal plane, is supported by a dielectric plate, and is fixed at a specific position through a dielectric bracket. The parasitic radiation element is loaded around the original antenna, so that the phenomenon that the cross polarization discrimination of the original antenna becomes poor along with the increase of the frequency is improved on the premise that other performances of the original antenna are not influenced.

The invention discloses a dual-polarized broadband antenna array with high isolation suspension microstrip line balanced feed. The antenna array mainly consists of an antenna body and a feed network for feeding the antenna body. The antenna body is composed of The antenna unit is arranged, and the antenna unit includes an upper dielectric board, a middle dielectric board, a lower dielectric board, a first polarized coaxial probe and a second polarized coaxial probe, and the upper surface of the upper dielectric board is printed A radiation patch is prepared and connected to the first polarized coaxial probe and the second polarized coaxial probe, and a ground reflection plate is printed on the lower surface of the lower dielectric board. Compared with the prior art, the invention has high isolation, high gain and wide impedance bandwidth.

The invention discloses an antipodal conical slot ultra-wideband antenna. The antenna comprises an upper-layer metal floor, an upper-layer dielectric substrate, a radiation patch, a lower-layer dielectric substrate and a lower-layer metal floor which are sequentially stacked from top to bottom, wherein the radiation patch, the upper-layer metal floor and the lower-layer metal floor all comprise oval metal parts, and the oval metal part of the radiation patch and the oval metal part of the lower-layer metal floor are distributed in an axial symmetry mode in the length direction of the dielectric substrate; and the elliptical metal part of the radiation patch and the elliptical metal parts of the upper and lower metal floors are respectively provided with three open slots. The traditional antipodal conical slot antenna is improved by slotting and introducing the additional metal ground, and the design of the high-gain ultra-wideband antenna is realized.

The invention discloses a differential Quasi-Yagi antenna with a filtering function. The differential Quasi-Yagi antenna with the filtering function comprises a substrate, wherein the substrate comprises an upper layer, a lower layer and a middle layer, the upper layer and the lower layer are both formed by microwave medium chips, and the middle layer is formed by prepregs. The differential Quasi-Yagi antenna with the filtering function further comprises a director (11), a radiating element (12), a reflector (13), a filter (14) and a transition structure (15). The differential Quasi-Yagi antenna with the filtering function has the advantages that the filtering function and the radiating function are integrated on the premise that the original size of the antenna is not increased, the structure is compact, cross polarization performance is high, and loss is low.

The invention relates to the technical field of suspension surface improvement methods, and discloses an adjustable axial ratio circular polarization decoupling improvement method for a suspension surface, and the method comprises the following steps: S1, selecting a dual circularly polarized antenna array; s2, reducing the array element spacing d; s3, formulating a same / different polarization hybrid decoupling scheme and corresponding design parameter indexes; s4, axial ratio adjustable improvement and corresponding design parameter indexes are formulated; s5, building a circular polarization decoupling suspension surface with the adjustable axial ratio; and S6, selecting an air dielectric plate as a support plate, setting the distance h between the suspension surface and the antenna array, and setting the length wpx of the reflective metal patch. According to the invention, the hybrid decoupling capability is improved, the axial ratio and the cross polarization are improved, the miniaturization and integration design is supported, the adaptability of broadband and multi-band operation, the communication efficiency and the system reliability are improved, the large-scale array scanning and satellite communication are supported, and the processing and cost challenges are reduced.