160results about How to "Improve Caliber Efficiency" patented technology

The invention relates to a planar horn antenna, in particular to a planar horn antenna for phase calibration. The antenna comprises a micro-strip feeder (1), a substrate integrated waveguide horn antenna (2) and a plurality of embedded plated-through holes (3) which are integrated on a dielectric substrate (4), the horn antenna (2) is composed of a first metal plane (8), a second metal plane (10) and two rows of plated-through hole horn side walls (11), the plated-through holes (3) are disposed in the horn antenna (2) and form a column or multiple columns of through hole linear arrays (12), each two adjacent columns of linear arrays (12) or one column of linear arrays (12), one row of horn side walls (11), the first metal plane (8) and the second metal plane (10) form a dielectric-filled waveguide (13), and one end of each dielectric-filled waveguide (13) is disposed in the horn antenna (2) while the other end thereof is disposed on an antenna aperture surface (14). In addition, the antenna is capable of increasing antenna gain.

The invention belongs to the technical field of antenna engineering, and discloses a strong mutual-coupling ultra-wideband wide-angle scanning dual-polarized conformal phased-array antenna. The strong mutual-coupling ultra-wideband wide-angle scanning dual-polarized conformal phased-array antenna comprises a conformal dielectric substrate, conformal dipole units, a circular metal patch, a conformal dielectric layer, a conformal dielectric impedance matching layer, a metal ground matching layer, an unbalance feeding structure, five grounding metallized through holes, a microwave coaxial cable and a metallized frustum-shaped carrier, wherein the conformal dipole units are printed on an upper layer of the conformal dielectric substrate, and placed in a vertical intersection way; the circular metal patch is printed on a lower layer of the conformal dielectric substrate; the conformal dielectric layer is positioned below the conformal dielectric substrate, and subjected to hole digging treatment; the conformal dielectric impedance matching layer is positioned above the conformal dielectric substrate; and the microwave coaxial cable is used for feeding the unbalance feeding structure. The weight of the novel antenna is only 70 percent that of a conventional phased array, so that the requirement on the load carrying of a carrier is lowered greatly. The metal ground matching layer is used, so that an original complex matching circuit is omitted; the machining difficulty is lowered greatly; and the machining cost of the antenna on engineering applications is lowered.

The invention discloses a broadband wire source for a planar waveguide CTS antenna feed device. The broadband wire source comprises an H-plane sectorial horn antenna, a bias parabolic reflection plane and a flat waveguide. The H-plane sectorial horn antenna and the bias parabolic reflection plane are arranged inside the flat waveguide, and the phase center of the H-plane sectorial horn antenna is arranged at the focus of the bias parabolic reflection plane. According to the invention, cylindrical waves are converted into plane waves, the plane waves are generated by using a reflector antenna principle, and the horn antenna is arranged at the focus of a paraboloid reflector so that a horn antenna radiation field passes through the reflector and generates the plane wave with equal amplitude and the same phase at the caliber surface of the reflector. The working frequency band is wide; the feed source shielding is eliminated and the caliber efficiency is enhanced through a bias; the structure is enclosed so that the edge diffraction effects of a conventional bias paraboloid are removed; and the structure is simple so that adjusting and assembling are easy, late use and maintenance are convenient, and the problem can be solved that the ideal wire source with equal amplitude and the same phase, generated by a conventional waveguide CTS antenna, cannot be realized in an actual project.

The invention discloses an air dielectric cylindrical lens antenna. The air dielectric cylindrical lens antenna comprises a metal disc-shaped parallel plate waveguide, a feed source antenna and arc-shaped metal support plates, wherein the metal disc-shaped parallel plate waveguide comprises an upper metal disc and a lower metal disc, the upper and the lower inner surfaces of the metal disc-shaped parallel plate waveguide are planes or arc-shaped surfaces, a central cavity of the metal disc-shaped parallel plate waveguide forms an air dielectric cylindrical lens, an annular boss is arranged below the edge of the upper disc of the metal disc-shaped parallel plate waveguide, the annular boss is arranged above the edge of the lower disc of the metal disc-shaped parallel plate waveguide, the feed source antenna is arranged between the two annular bosses, the feed source antenna is embedded in an arc-shaped groove between the arc-shaped metal support plates on the edges of the two metal discs, and the arc-shaped metal support plates are connected with the two metal discs through screws. The feed source antenna is a horizontal polarization gradient groove antenna or a horizontal polarization gradient groove antenna array.

A high-gain low-profile null feed array antenna comprises a metal cover plate, a metal side plate, a metal bottom plate and a feed source. The metal cover plate locates at the upper part, the metal bottom plate locates at the lower part and the metal side plate locates at the middle part; the metal cover plate, the metal bottom plate and the metal side plate are connected with each other to form a cavity in which the feed source is arranged; the metal cover plate is a metal flat plate which is provided with a group of gap units arranged periodically; the feed source comprises a feeding patch located in the middle of the housing and a group of passive parasitized patches around; the feeding patch and the parasitized patch are printed on the upper surface of a same dielectric substrate; the lower surface of the dielectric substrate is attached on the upper surface of the metal bottom plate; and the feeding patch is activated by a cable through a radio frequency coaxial joint. The antenna has the advantages of simple feeding, high gain of more than 20dBi, high caliber efficiency of more than 60 percent and low cost.

A rock surface fracturing microwave focusing radiator comprises a standard waveguide section, an impedance matching section and a compression radiation section. The standard waveguide section is used for allowing microwaves transmitted by a microwave source to be connected and is connected with the compression radiation section through the impedance matching section which forms impedance matching between the standard waveguide section and the compression radiation section. The compression radiation section radiates the focused microwaves outwards. The standard waveguide section and the compression radiation section both adopt uniform section rectangular metal cavities, and the impedance matching section adopts a variable section rectangular metal cavity. The wide edge sizes of the standard waveguide section, the impedance matching section and the compression radiation section are matched with the wave length of the microwaves transmitted by the microwave source. The longitudinal narrow edge size of the impedance matching section is in linear transition from large to small. The large size end of the impedance matching section is connected with the standard waveguide section, and the small size end of the impedance matching section is connected with the compression radiation section. The standard waveguide section has two microwave connection structure forms, the first microwave connection structure form is that the microwaves are connected through a rectangular waveguide or annular device, and the second microwave connection structure form is that the microwaves are connected through a coaxial converter and a coaxial cable.

The invention provides a dual polarization high gain MIMO antenna based on aperiodic artificial magnetic conductor structure, the antenna is formed by double-layer-stacked dielectric substrate and comprises a patch antenna which is printed on the upper surface of upper layer of the dielectric substrates, a metal floor which is printed on the lower surface of lower layer of the dielectric substrates, an artificial magnetic conductor reflective plate which is printed on the upper surface of lower layer of the dielectric substrates, four coaxial feed probes which insert into the artificial magnetic conductor reflective plate and the upper surface of the dielectric substrates from the lower surface of the lower layer of the dielectric substrates, wherein the probes are connected with the cross patch antenna; the patch antenna is a cross structure, the artificial magnetic conductor reflective plate is divided into a plurality of artificial magnetic conductor units which are in different sizes and is arranged in central symmetry, and each artificial magnetic conductor unit is a rectangular metal patch. The antenna can realize radiation characteristics of dual polarization, high gain, high efficiency and high isolation.

The invention provides a broadband beam scanning reflective array antenna, which is used for solving the technical problems of narrower bandwidth and low aperture efficiency in the prior art, and comprises a reflective array consisting of M * N reconfigurable reflective array units which are periodically arranged, a feed source fixed at the focus position of the reflective array, and a main control circuit board, the reconfigurable reflective array unit comprises a first dielectric substrate, a second dielectric substrate and a third dielectric substrate, wherein the first dielectric substrate and the second dielectric substrate are sequentially stacked from top to bottom and are equal in thickness. The square radiation patch is printed on the upper surface of the first dielectric substrate; the upper surface of the second dielectric substrate is printed with a double-side annular radiation patch; the upper surface of the third dielectric substrate is printed with a reflection floor etched with a choke ring, the lower surface of the third dielectric substrate is printed with a first rectangular microstrip line and a direct current bias line, and the first rectangular microstrip line is etched with a rectangular gap dividing the first rectangular microstrip line into two parts for loading a PIN diode; and the square radiation patch and the double-side annular radiation patch are connected in parallel through a first metalized via hole and then are connected in series with a PIN diode and a direct current bias line.

The invention provides a broadband low-sidelobe series-fed CTS (Continuous Transverse Stub) antenna, and aims to provide a CTS antenna which is high in gain and efficiency, good in standing wave, high in radiation capability and obvious in grating lobe suppressing effect. The broadband low-sidelobe series-fed CTS antenna is implemented according to the technical scheme that a radiation array (1) is provided with a plurality of hollowed-out air elongated slots (12) with a two-stage stepped transition structure, a split waveguide power divider (13) is arranged above a boundary step surface, and each waveguide power divider divides the corresponding air elongated slot into two identical two-stage stepped transition channels (14); and in operation, a feed waveguide cavity (2) at the bottom of the radiation array provides quasi-TEM waves through a hollowed-out inclined air cavity (22), and the quasi-TEM waves sequentially flow into each antenna radiation unit in the radiation array (1) from left to right and radiate into the natural space from the air elongated slot to the waveguide power divider and then to the two-stage stepped transition channels, thereby enabling an antenna directional pattern to realize low sidelobe within a broadband along a radiation unit distribution surface. The antenna provided by the invention is particularly suitable for acting as a broadband low-sidelobe series-fed array antenna.

The invention discloses a microwave energy receiving flat panel capable of absorbing a linearly polarized incident wave in a random direction. The microwave energy receiving flat panel is formed by continuation and arrangement of at least one sub-wavelength square array unit, wherein a square dual linearly polarized resonance structure is etched on a first thin metal layer; the first thin metal layer is formed by forming bar grooves at opposite corners and inside a patch; two metal via holes are formed in the patch; the two metal via holes pass through various middle layers and are connected with two power combining networks respectively; the two power combining networks are located in two layers of strip line structures respectively and are formed by cascading two-in-one power combining circuits; output ends of the two power combining networks are connected with two input ends of a directional coupler; two output ends of the directional coupler are connected with two rectifier circuits respectively; and the output ends of the rectifier circuits are connected in parallel such that a direct-current output is obtained. The microwave energy receiving flat panel achieves efficient receiving of linearly polarized incident electromagnetic wave energy in the random direction in the space, and can be widely applied to the fields of receiving and converting of microwave energy with various bands and power levels.

The invention discloses a planar-surface feed source transmitting and receiving integrated double ellipsoid lens antenna. The antenna includes a double ellipsoid lens antenna, a lens extension layer, a lens support, a pedestal, receiving feed source antenna arrays and transmitting feed source antenna arrays. The double ellipsoid lens antenna, the lens extension layer and the lens support are all made of medium. The lens support is a hollow cylindroid and the pedestal is a cylindroid. The upper surface of the pedestal is provided with the receiving feed source antenna arrays and the transmitting feed source antenna arrays. A one-dimensional scanning or a two-dimensional scanning array is formed according to the distribution way of the receiving feed source antenna arrays and the transmitting feed source antenna arrays. Each of the receiving feed source antenna arrays and the transmitting feed source antenna arrays includes a plurality of microstrip antennas. According to the invention, integration of a transmitting antenna and a receiving antenna is achieved; the design freedom is high; the aperture efficiency is high; the side beam is comparatively low; the directionality is good; and the weight is low. The antenna provided by the invention is easy to integrate to a planar circuit.

The invention discloses a flat plate array antenna for X frequency band, comprising a plurality of antenna array units. Each antenna array unit comprises a circularly-polarized cover, a tuning air cavity, a cross radiator slit, a waveguide mode type transmission cavity body, a square orthogonal mode coupler, a first strip line input terminal, and a second strip line input terminal. The tuning aircavity is disposed at the upper part of the cross radiator slit. Each slit of the cross radiator slit is arranged in a rotating manner at an interval of 90 D. The waveguide mode transmission cavity body is disposed at the lower part of the cross radiator slit. The square orthogonal mode coupler is disposed at the lower part of the waveguide mode transmission cavity body. The first strip line inputterminal is disposed at one side face of the square orthogonal mode coupler, and the second strip line input terminal is disposed at the other side face of the square orthogonal mode coupler, whereinthe two side faces are adjacent. The antenna array of the invention is advantageous in that efficiency is high, cross section is low, gain is high, wave beam is narrow, processing is easy.

The invention relates to an X-band low-grating-lobe circularly polarized antenna, which is composed of a long horn antenna and a separator plate polarizer. The long horn antenna adopts a multi-inner-cavity design of metal separator plates. The aperture field distribution is improved by filling a radiation aperture surface with a dielectric material, so that the antenna gain and aperture efficiencyare improved, narrower directional diagram zero-point width is ensured, and grating lobe suppression capability is improved. The long horn antenna is connected with the separator plate polarizer through a flange in a waveguide cascade mode. The separator plate polarizer is a square waveguide with a metal separator plate in the middle, and the square waveguide is divided into two rectangular waveguides through the metal separator plate, so that a transmitting channel and a receiving channel are formed; and coaxial waveguide conversion of guide openings of the two rectangular waveguides is achieved through a stepped impedance converter. The X-band low-grating-lobe circularly polarized antenna adopts the waveguide as a main body structure, so that the complexity of structural design is simplified, the link loss is reduced, the utilization efficiency of the aperture of an array surface is improved, and the later-period assembly production and equipment debugging efficiency is improved.

The invention discloses a design method of a to-earth ultralow side lobe. The method comprises the following realizing steps: 1. establishing a coordinate system, and determining a to-earth region according to the altitude of a satellite orbital; 2. determining the number of partitions to be subjected to an ultralow side lobe pattern synthesis, and determining an initial region of each partition;3. separately performing the ultralow side lobe pattern synthesis on the region of each partition by using an improved alternating projection algorithm, so as to obtain an array weighting value of each partition separately subjected to the ultralow side lobe pattern synthesis, and determining an actual action region of each ultralow side lobe pattern; and 4. selecting an appropriate array weighting value according to a scanning angle of the pitching direction of a main beam. The design method can quickly perform the ultralow side lobe pattern synthesis on the to-earth region through a large-scale planar array, has a relatively good suppression effect on side lobes in the to-earth region, effectively lowers the demand for the dynamic range of an attenuator, improves the aperture efficiencyof the array, reduces the gain loss, has short array synthesis time, and can meet the demand of a satellite-borne phased array for to-earth side lobe suppression.

The invention discloses a high-order mode single-pulse antenna based on substrate integrated waveguide. A feed network, an upper layer medium base plate and a substrate integrated waveguide cavity aresequentially arranged from top to bottom. The feed network comprises a difference port network and a port network respectively arranged at two ends of an antenna; the substrate integrated waveguide cavity is divided into four independent symmetrical sub waveguide cavities through a first metal through hole in a shape like a Chinese character 'tian'; the difference port network and the port network respectively correspond to two sub waveguide cavities and respectively correspond to one row of second metal through holes; 180-degree phase differences are formed in the sub waveguide cavity corresponding to the difference port network, so that difference beams are obtained; and sum beams are obtained in the sub waveguide cavity corresponding to the port network. The single-pulse antenna provided by the invention has the advantages of simple structure, high radiation efficiency and low profile. The feed network design of the single-pulse antenna is greatly simplified.

The invention discloses a vehicle-mounted millimeter-wave anti-collision radar antenna system comprising a back focus antenna. A lens unit is fixed to the opened end of the back focus antenna, and a microstrip antenna is fixed to the narrow end; the lens unit comprises an emitting lens and a receiving lens; the microstrip antenna includes an emitting antenna and a receiving antenna, and the receiving antenna irradiates the receiving lens through three microstrip pastes arrayed horizontally; the emitting antenna is connected to a power amplifier, a directional coupler, a pressure controlled oscillator and a linear modulator sequentially; the receiving antenna is connected to a low noise amplifier, a low pass filter and an intermediate frequency unit sequentially; the microstrip antenna adopts microstrip wire feed, the microstrip antenna array performs feed in a manner of mixing serial connection and parallel connection. The system is low in production cost and can be produced in batches; in the horizontal direction, the wave beams are narrow, the wave beam covering area is ideal, and the gain is high; the feed system consumption is low, irradiating efficiency is high, and the system can be widely applied to millimeter-wave radars of vehicles of low and medium grades.

The invention discloses a frequency scanning CTS flat panel array antenna, includes a radiation layer and a broadband line source layer arranged in order from top to bottom, the radiation layer includes a first radiation element and a second radiation element, a first radiating element is located above the second radiating element, the first radiation unit includes a first metal plate and 17 continuous transverse branches disposed on the first metal plate, the first metal plate is a rectangular plate, 17 consecutive transverse branch are uniformly spaced from left to right on that first metalplate. The second radiating unit comprises a second metal plate on which a non-uniform slow wave structure, a sixth rectangular waveguide cavity and a seventh rectangular waveguide cavity are sequentially arranged from left to right, and a broadband line source layer comprises a third metal plate, a single ridge waveguide feeding network and a single ridge waveguide. The second radiating unit comprises a second metal plate, wherein the second metal plate is provided with a non-uniform slow wave structure, a sixth rectangular waveguide cavity and a seventh rectangular waveguide cavity from leftto right Rectangular waveguide converter and quasi-TEM mode line source generator. The invention has the advantages of small size, high gain and high efficiency.

The invention belongs to the technical field of a microwave antenna and discloses a broadband high isolation double circularly polarized antenna based on a single layer artificial surface Plasmon. Theantenna includes a radiator, two vertically placed differential feed baluns and a metal reflector, wherein the radiator is located above the floor, upper ends of the two baluns are connected with theradiator, lower ends of the baluns penetrate through the metal floor and are connected with a feeding coaxial line, the radiator consists of four dipoles, two pairs of feeders and four parasitic metal rings, and the two pairs of feeders include a pair of coplanar strip lines and a pair of odd-mode artificial surface plasmon transmission lines. Full-wave electromagnetic simulation and processing tests are performed for the designed antenna, and that the antenna is capable of achieving broadband high isolation double circularly polarized radiation in the designed frequency band is verified. Theantenna is advantaged in that properties of high isolation, wide axial ratio bandwidth, high aperture efficiency and easy processing are achieved, and the application prospect is wide.

The invention discloses a three-dimensional packaged surface antenna capable of seam phase calibration and relates to a horn antenna. The antenna comprises a metallized vertical via hole feeder line (1), a horn antenna (2) and seams (3), which are integrated on a medium substrate (4), the medium substrate (4) is arranged on the uppermost surface of a three-dimensional package (5), one end of the metallized vertical vial hole feeder line (1) is connected with an internal circuit (8), the horn antenna (2) is composed of a bottom metal plane (6), a top metal plane (9) and a metallized via hole side wall (11), a plurality of seams (3) are arranged in the bottom metal plane (6) and the top metal plane (9), and several sub-horns (16) are formed in the substrate integrated waveguide horn antenna (2) by the seams (3), one ends of the seams (3) face the short-circuit side (15), and the other ends of the seams (3) are arranged on an antenna aperture surface (12). Electromagnetic wave energy in the antenna can reach the antenna aperture surface (12) by the same phase. By the antenna, antenna aperture efficiency and gains can be improved.

The invention discloses a single-layer microstrip dual-polarization transmission array antenna and a manufacturing method. The antenna is composed of a horn feed source and a Huygens metasurface microstrip dual-polarization transmission array. The horn feed source is composed of a waveguide and a horn opening, and the Huygens metasurface microstrip dual-polarization transmission array is composedof N * N metasurface transmission units. The metasurface transmission unit is composed of two layers of composite metal structures with biaxial symmetry on an xy plane and a single-layer dielectric plate, and the composite metal structure on the upper layer is formed by opening gaps on four sides of a square metal frame, and the composite metal structure on the lower layer is formed by removing four corners on a square metal frame. The dual-polarization transmission array antenna is manufactured based on a single-layer dielectric plate, through holes do not need to be punched, and the performance of the dual-polarization transmission array antenna meets the beneficial effects of low sidelobe, high gain, high aperture efficiency, enough bandwidth and the like, so that the dual-polarizationtransmission array antenna is easier to manufacture, lower in cost and easier to assemble and integrate under the condition that the same performance of a traditional transmission array antenna is achieved.