80results about How to "Inhibition of cross polarization" patented technology

The invention relates to a broadband differential feed microstrip filtering antenna, and aims at overcoming that a traditional microstrip antenna is narrowband and incapable of gain selection. The antenna in the invention comprises three dielectric substrates, an air layer between the upper and middle dielectric substrates, a main radiation patch positioned in the upper surface of the middle dielectric substrate, a parasitic patch positioned in the lower surface of the upper dielectric substrate, the floor with a pair of slits, and a feed microstrip line positioned in the lower surface of thelower substrate and provided with a pair of branches and resonance slits; and the main radiation patch and the parasitic patched covered by the medium generate resonance, the broadband and high-gain radiation passband are provided, and a zero gain point in the edge of the passband is generated. The radiation characteristic of the antenna is further improved via a differential feed technology, andminiaturized and integrated design is easy to realize. The antenna provided by the invention is simple in structure, wider in bandwidth, high in selectivity, can be processed via PCB technology, low in processing cost and capable of large-scale production.

The invention belongs to the technical field of spatial filtering and discloses a light-controlled polarization reconfigurable frequency selective surface unit structure and a radar communication radome. The light-controlled polarization reconfigurable frequency selective surface unit structure comprises an intermediate three-layer dielectric substrate, two layers of patches with different structures on the upper and lower sides of the dielectric substrate, two light-controlled microwave switches on a lower layer patch, and a metal pillar which is connected to the upper and lower layer patchesand passes through the dielectric substrate, wherein an I-shaped slit is formed at the right side of a metal layer according to an upper layer patch structure, two mutual perpendicular T-shaped slitsare formed in the metal layer, two light-controlled microwave switches are loaded to the two T-shaped slits, and the ON and OFF of the light-controlled microwave switches are controlled by introducing laser with fibers. According to the invention, on one hand, the effect of spatial filtering can be achieved, and on the other hand, the 0-degree and 90-degree polarization reconfigurable functions of the antenna can be achieved.

The invention discloses a double-reflecting surface antenna with a special shape guided wave dielectric rod feeding. The antenna includes a circular waveguide, a guided-wave dielectric rod, a taperedsecondary reflecting surface, a parabolic reflecting surface, and a metal ring, wherein the guided-wave dielectric rod is located between the tapered secondary reflecting surface and the circular waveguide, the guided-wave dielectric rod is inserted to the inner cavity of the circular waveguide, the guided-wave dielectric rod located in the inner cavity portion of the circular waveguide is dividedinto a plurality of coaxial circular tables, and the radius of the circular tables decreases progressively in a direction from the tapered secondary reflecting surface to the parabolic reflecting surface; the circular waveguide is located at the center of the main reflecting surface, the axis of the circular waveguide and the diameter of the antenna point to the same direction, and a microwave signal is introduced by the circular waveguide, sent to the tapered secondary reflecting surface by the guided-wave dielectric rod and reflected to the parabolic reflecting surface, and finally emittedby the parabolic reflecting surface in parallel. The invention effectively improves the reflection coefficient S11 of the double-reflecting surface antenna, is capable of effectively suppressing the cross polarization, reducing the ohmic loss, reducing the sidelobe level, and improving the radiation efficiency, and is symmetrical in structure, compact and simple, and easy to implement.

A three-polarized half-slot antenna with coaxial feeding capacitance loaded with step impedance by a grid slot relates to a slot antenna, which is composed of three single-polarized antennas (13); each antenna (13) includes a dielectric substrate (1 ), metal ground (2) and radiation slots (3), coaxial feeder (4) on the dielectric substrate (1); radiation slots (3) and multiple parallel grid slots (6) on the metal ground (2) One end of the radiation slot (3) is short-circuited, and the other end is open; the radiation slot (3) has several capacitors (7) connected in parallel across its edge to form a low-resistance slot (8) near the open-circuit end; the radiation slot ( 3) The remaining part is a high-resistance slot (9), the outer conductor (5) of the coaxial feeder (4) is connected to the metal ground (2), and the inner conductor (12) at the end of the coaxial feeder (4) crosses the high-resistance slot (9) At its edge (11), it is connected to the metal ground (2). The antenna operates in multiple bands, allowing for reduced antenna size, cross-polarization, shadowing, and improved isolation.

A slot antenna of gate slot ground coaxial feed metal via hole stepped-impedance relates to a slot antenna, and comprises a dielectric substrate (1), a metal ground and a radiation slot (3) which are arranged on the dielectric substrate (1) and a coaxial feeder line (4). The radiation slot (3) and a plurality of parallel gate slots (6) are arranged on the metal ground (2), and the two ends of the radiation slot (3) are in short circuit. Two rows of metallization via holes (7) at the middle part of the radiation slot (3) are in array arrangement to form a low-resistance slot (8), and the rest part of the radiation slot (3) is a high-resistance slot (9). A conductor (5) outside the coaxial feeder line (4) is connected with the metal ground (2), a conductor (12) in the tail end of the coaxial feeder line (4) spans the high-resistance slot (9) and is connected with the metal ground at the edge (11) of the high-resistance slot (9). The antenna is in multi-frequency band work, enables the size and the shelter to be reduced and the isolation to be improved, and restrains the cross polarization.

The invention discloses a coaxial feed low-resistance side wall stepped impedance type tri-polarization slot-slit antenna, and relates to a slot antenna. The antenna comprises three perpendicularly-placed single-polarized antennas (13), wherein each antenna (13) comprises a dielectric substrate (1), and a metal ground (2) and a radiation slot slit (3) on the dielectric substrate (1), and a coaxial feeder line (4); the radiation slot slit (3) is formed in the metal ground (2); the two ends (6) of the radiation slot slit (3) are in short circuit; a low resistance slot slit (8) formed by two metalized side walls (7) is formed in the middle of the radiation slot slit (3); a high resistance slot slit (9) is formed in the rest part of the radiation slot slit (3); the outer conductor (5) of the coaxial feeder line (4) is connected with the metal ground (2); and the inner conductor (12) at the tail end of the coaxial feeder line (4) crosses over the high resistance slot slit (9), and is connected with the metal ground (2) on the edge (11) of the high resistance slot slit (9). The antenna is in multi-band operation, so that the antenna dimensions, and the conditions of crossed polarization and shielding can be reduced, and isolation among ports can be improved.

The invention relates to a coaxial feed slot antenna with metal through holes of step impedance. The antenna comprises a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3) and a coaxial feed line (4); the radiation slot (3) is arranged in the metal ground (2); the two ends of the radiation slot (3) are shorted; two rows of metal through hole (7) arrays in the middle portion of the radiation slot (3) for a low-resistance slot (8); residual part of the radiation slot (3) is a high-resistance slot (9); and an outer conductor (5) of the coaxial feed line (4) is connected with the metal ground (2), and an internal conductor (12) at the tail end of the coaxial feed line (4) is connected with the metal ground (2) by crossing edges (11) of the high-resistance slot (9). The antenna works in a multiband manner, the size of the antenna is reduced, cross polarization and shielding are realized, and isolation is improved.

The invention provides a metasurface antenna with rectangular patch arrays arranged in a staggered mode. Theantenna comprises a metal grounding plate, a dielectric substrate, a metasurface and a feed probe. The metasurface is arranged on the upper surface of the dielectric substrate, the metal grounding plate is arranged on the lower surface of the dielectric substrate, the metasurface comprises a rectangular patch arrays arranged in a staggered mode, a rectangular patch in the center of the metasurface serves as a driving unit, other rectangular patches serve as coupling units, and the feed probe longitudinally penetrates through the metasurface and the dielectric substrate and is connected with the rectangular patch in the center. According to the metasurface, a similar microstrip patch technology is adopted, the metasurface is easy to integrate and machine, and a profile is low; and by introducing the metasurface, the structure not only can generate the broadband characteristic of double resonant frequency points, but also improves a gain of the traditional patch antenna. Meanwhile, the structure realizes suppression of cross polarization on a vertical plane.

The invention relates to a miniaturized broadband tri-polarized antenna, and belongs to the technical field of antennas. The antenna comprises a dielectric cavity placed on a metal bottom plate,wherein an antenna vertical radiator part is printed on the surface of the dielectric cavity; a radiation cover plate which is arranged right above the dielectric cavity, wherein an antenna horizontal dual-polarized radiator part is printed on the upper surface of the radiation cover plate; two microstrip dielectric plates which are arranged in the dielectric cavity in a crossed manner, wherein microstrip lines are printed on the front surfaces of the microstrip dielectric plates, metal ground planes with gaps are printed on the back surfaces of the microstrip dielectric plates, the upper edges of the metal ground planes are connected with the antenna horizontal dual-polarization radiator part, and the lower edges of the metal ground planes are connected with the metal bottom plate; and a feed substrate which is arranged in the dielectric cavity, wherein an equal power division microstrip matching circuit is printed on the upper surface of the feed substrate. The antenna provided by the invention realizes the broadband and miniaturization of a tri-polarized antenna, and can be used as a base station antenna and an antenna in a mobile communication system to improve the spectrum utilization rate, increase the communication capacity and the like.

A slot antenna with a coplanar waveguide feeding capacitor loaded with a step impedance relates to a slot antenna, the antenna comprises a dielectric substrate (1), a metal ground (2) on the dielectric substrate (1), a radiation slot (3), a common Surface waveguide feeder (4); a radiation slot (3) is arranged on the metal ground (2); both ends (6) of the radiation slot (3) are short-circuited; there are several capacitors (7) in the middle of the radiation slot (3) Connected in parallel at its edge to form a low-resistance slot (8); the rest of the radiation slot (3) is a high-resistance slot (9); the coplanar waveguide feeder (4) the outer conductor (5) and the metal ground (2) ) is connected, and the inner conductor (12) at its end crosses the high-resistance slot (9) at its edge (11), and is connected with the metal ground (2). The antenna is multi-band operation to reduce antenna size, cross-polarization, shading and improve isolation.

The triple-polarized half-slot antenna with dual-frequency capacitor-loaded step impedance relates to a slot antenna, which is composed of three mutually perpendicularly placed single-polarized antennas (13); each antenna (13) includes a dielectric substrate (1) , the metal ground (2) and the radiation slot (3) on the dielectric substrate (1), and the microstrip feeder (4); the radiation slot (3) is on the metal ground (2); the radiation slot (3) is short-circuited at one end , the other end (6) is open; the radiation slot (3) near the open end has several capacitors (7) connected in parallel across the edge of the radiation slot (3) to form a low-resistance slot (8); the radiation slot (3) The rest is a high-resistance slot (9), one end of the microstrip feeder (4) is the antenna port (10), and the other end of the microstrip feeder (4) is open-circuited across the high-resistance slot (9) and short-circuited at the edge (11) Pin (12) is connected with metal ground (2). The antenna operates in multiple bands, allowing for reduced antenna size, cross-polarization, shadowing, and improved isolation.

The invention relates to an implementation method and system of a Ku frequency band ultralow cross polarization multi-beam antenna. The antenna is based on a single-aperture multi-beam antenna technology and comprises a reflector, a polarization grid plate and a feed source array. The multi-beam antenna and the polarization grid plate are combined, various parameters of the polarization grid plateare optimally designed, the maximum efficiency transmission of main polarization and the highest suppression of cross polarization are ensured, the cross polarization isolation (XPD) of the multi-beam antenna is greatly improved, and high-gain coverage of a specified area is also ensured.

The invention discloses a semi-slot antenna with gate gap ground coaxial feed capacitor-loaded step impedance, which relates to a slot antenna. The antenna comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) on the dielectric substrate (1) and a coaxial feed line (4), wherein the metal ground (2) is provided with the radiation slot (3) and multiple parallel gate gaps (6); one end of the radiation slot (3) is short-circuited and the other end is open-circuited; the part, close to the open-circuited end, of the radiation slot (3) is provided with a plurality of capacitors (7) in parallel bridge connection onto the edge to form a low-impedance slot (8); the rest part of the radiation slot (3) is a high-impedance slot (9); an outer conductor (5) of the coaxial feed line (4) is connected with the metal ground (2); and the tail inner conductor (12) of the coaxial feed line (4) passes across the high-impedance slot (9) to be connected with the metal ground (2) at the edge (11). The antenna works under multiple frequency bands, the antenna size, cross polarization, and shielding are reduced, and isolation is improved.

The invention discloses a three-polarization slot antenna with coplanar waveguide feed metal via hole step impedance, which relates to a slot antenna. The antenna is composed of three single-polarization antennas (13) placed vertically mutually. Each antenna (13) comprises a dielectric substrate (1), a metal ground (2) and a radiation slot (3) on the dielectric substrate (1) and a coplanar waveguide feed line (4), wherein the metal ground (2) is provided with the radiation slot (3); two ends (6) of the radiation slot (3) are short-circuited; the middle of the radiation slot (3) is provided with an array of two rows of metal via holes (7) to form a low-impedance slot (8); the rest part of the radiation slot (3) is a high-impedance slot (9); an outer conductor (5) of the coplanar waveguide feed line (4) is connected with the metal ground (2), and the tail inner conductor (12) passes across the high-impedance slot (9) to be connected with the metal ground (2) at the edge (11). The antenna works under multiple frequency bands, the antenna size, cross polarization, and shielding are reduced, and isolation is improved.

Dual -frequency electrical capacity loaded steering -oriented groove antenna involves a gap antenna, which includes the medium substrate (1), the metal land (2) on the medium substrate (1), and the radiation slot (3), the micro -band feed line (4); there is a radiation slot seam (3) on the metal field (2); the two ends of the radiation slot (3) (6) short circuit; in the middle of the radiation slot (3), there are several capacitors (7) in parallel to the radiationSlot joint (3) The edge of low -resistance grooves (8); radiation grooves (3) the rest are high -resistance grooves (9), micro -band feed line (4) one end is antenna port (10), micro -band feed line (4) The other end opens through the high -resistance slot (9) on the edge (11) to connect to the metal land (2) through a short -circuit needle (12).The antenna is a multi -frequency band work, which can reduce the size of the antenna, cross polarization, cover and improve isolation.

The invention provides a coaxial feed capacitance-loaded triple-polarized slot antenna, and relates to a slot antenna. The antenna comprises three single-polarized antennas (11), which are perpendicular to each other, wherein each antenna (11) comprises a dielectric substrate (1), a metal ground plane (2), a radiation slot (3) and a coaxial feeder line (4); each metal ground plane (2) and each radiation slot (3) are arranged on the corresponding dielectric substrate (1); each radiation slot (3) is formed in the corresponding metal ground plane (2); two ends of each radiation slot (3) are short-circuited; a plurality of capacitors (7) are arranged in each radiation slot (3) and are bridged to the edge of the radiation slot (3) in parallel; an antenna port (8) is arranged at one end of each coaxial feeder line (4); and an inner conductor (9) at the other end of each coaxial feeder line (4) strides across the corresponding radiation slot (3), is located at the edge (10) of the corresponding radiation slot (3) an d is connected with the corresponding metal ground plane (2). According to the antenna, the antenna dimension, cross polarization and shielding can be reduced, and isolation can be improved.