1410 results about "Circular polarization" patented technology

The invention discloses a broadband high-efficiency 1bit circularly polarized reconfigurable transmission unit and an array antenna. The reconfigurable transmission unit comprises a circularly polarized wave receiving patch, an upper-layer dielectric substrate, an upper-layer metal ground plane, a middle dielectric substrate, a DC bias line, a lower-layer metal ground plane, a lower-layer dielectric substrate and a radiation patch which are sequentially arranged from top to bottom, and can directly realize two unit phases of 0 degree and 180 degrees of circularly polarized transmission waves; the equivalent rotation phase is free of dispersion; the state of each unit in the transmission array is controlled through the FPGA, + / -60-degree large-angle scanning of circular polarization transmission beams can be achieved, the beam performance is good, and high circular polarization purity is achieved. The array antenna provided by the invention has the advantages of wide axial ratio bandwidth and high aperture efficiency, and has relatively high application potential and value in scenes requiring real-time electric control circular polarization beam scanning antennas, such as application of long-distance radar detection, communication systems and the like.

The invention discloses a compact dual-frequency dual-circularly-polarized satellite-borne common-caliber antenna array, which belongs to the technical field of antennae, and comprises a plurality of basic sub-arrays, each basic sub-array comprises a low-frequency receiving antenna, a high-frequency transmitting antenna, a metal cavity, a transmitting-receiving antenna differential feed phase-shift network and an antenna supporting structure which are sequentially connected from top to bottom; the transmitting antenna is fixed on the metal cavity, the metal cavity is connected with a feed probe insulator, a metal probe in the middle of the feed probe insulator is connected with feed coupling branches of the receiving antenna and the transmitting antenna in a spot welding mode, the metal cavity is provided with an open slot, and the open slot is communicated with the feed probe insulator. The receiving antenna is inserted into the transmitting antenna and the open slot in a plug-in manner; wherein the receiving antenna and the transmitting antenna both adopt an antenna form of differential feed and inverted-L-shaped probe adjacent coupling feed. According to the array, through reasonable arrangement of the receiving antenna, the transmitting antenna, the metal cavity, the transmitting and receiving antenna differential feed phase shift network and the antenna supporting structure, the requirements of low cost, integration, light weight and multi-band application of the satellite-borne phased array are met.

The invention discloses a radiation-receiving type low-profile dual-beam array antenna and a folding decoupling design method. The low-profile dual-beam array antenna is composed of a transmission metasurface, a polarization conversion metasurface and a horn feed source. The transmission metasurface is formed by periodically extending and arranging m * m radiation-receiving units in a plane at equal intervals, and efficient transmission and spin decoupling focusing phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The radiation-receiving unit is composed of three layers of metal and two layers of dielectric plates. The polarization conversion metasurface is formed by periodically extending and arranging n * n polarization conversion units in a plane at equal intervals, and efficient reflection, polarization conversion and wave beam non-mirror image deflection phase regulation and control of electromagnetic waves of a specific frequency band are achieved. The polarization conversion unit is composed of two layers of metal and a layer of dielectric plate. The low-profile dual-beam array antenna provided by the invention can generate two independently regulated orthogonal circularly polarized waves through spin decoupling under the excitation of a circularly polarized wave feed source, and has the remarkable advantages of high aperture efficiency, low profile and the like.

Provided is an optical laminate that includes solidified liquid-crystal oriented layers and is capable of suppressing specific display unevenness when applied to an image display device. An optical laminate according to an embodiment of the present invention comprises: a polarizing plate including a polarizer; and a retardation layer that is laminated on the polarizing plate with a first adhesive layer therebetween. The retardation layer includes, in order from the polarizing plate side, a first solidified liquid-crystal oriented layer and a second solidified liquid-crystal oriented layer laminated on the first solidified liquid-crystal oriented layer with a second adhesive layer therebetween. The retardation layer has a circular polarization function or an elliptical polarization function over the entirety thereof and has a relationship Re(450) < Re(550) < Re(650). The thickness of at least one of the first adhesive layer and the second adhesive layer is 300 nm or less.

The utility model discloses a double-frequency circularly polarized fusion antenna with a large frequency ratio, which comprises a first dielectric plate and a second dielectric plate, the first dielectric plate is positioned above the second dielectric plate, and the lower surface of the first dielectric plate is a copper-clad layer serving as a grounding plate. And a first metal radiator, a second metal radiator, a third metal radiator and a fourth metal radiator are arranged on the upper surface of the antenna. One end, close to the center of the dielectric plate, of the radiator is loaded with a metal column and connected with the grounding plate, and one end, away from the center of the dielectric plate, of the radiator is loaded with a millimeter wave metal probe. A microwave feed network and four 180-degree phase difference power dividers are arranged on the lower surface of the second dielectric plate, an output port of the microwave feed network is connected with the four microwave metal probes, and output ports of the 180-degree phase difference power dividers are connected with the eight millimeter wave metal probes. The dual-frequency circular polarization antenna has a dual-frequency circular polarization characteristic, can effectively reduce the influence of a multipath effect, and achieves the multiplexing of the radiator, thereby reducing the demands for the space resources of communication equipment.

The invention provides an adjustable power distribution circuit capable of realizing any polarization mode, the adjustable power distribution circuit is positioned between a radio frequency circuit and at least one antenna assembly, the adjustable power distribution circuit comprises an input signal part, at least two signal control parts, a processing unit and at least one orthogonal coupling circuit, the input signal part can convert a radio frequency signal from the radio frequency circuit into a plurality of corresponding input signals and transmit the input signals to each signal control part, each signal control part can convert the input signals into corresponding control signals according to a processing instruction of the processing unit and then transmit the control signals to the orthogonal coupling circuit, and the orthogonal coupling circuit transmits the control signals to the radio frequency circuit. And the orthogonal coupling circuit generates two output signals with a phase difference of 90 degrees, and transmits the output signals to the antenna assembly. Therefore, the adjustable power distribution circuit can enable the antenna assembly to form a linear polarization mode, a circular polarization mode or an elliptical polarization mode in any direction according to actual requirements of products.

The invention relates to the technical field of optical devices, and provides a tunable metasurface structure, an imager and a target recognition method, the tunable metasurface structure comprises a first electrode layer, a second electrode layer, a liquid crystal layer and a metasurface layer; voltage is applied to the first electrode layer and the second electrode layer to control the turning direction of liquid crystal molecules in the liquid crystal layer so as to adjust the polarization state of light in an incident image; the metasurface layer performs different responses on light rays in different polarization states through polarization multiplexing, a left-hand circular polarization state and a right-hand circular polarization state are used for encoding positive and negative values of weights, and a multi-channel A * A light spot matrix is generated through spatial multiplexing, so that an emergent feature image is determined through the light spot matrix; different light spot brightness in the light spot matrix is used for representing different convolution kernel weights. The metasurface and the liquid crystal are combined to obtain a tunable structure, various coding information can be processed, and therefore the object recognition accuracy and robustness are improved.

The invention relates to a double-pump light semi-transparent and semi-reflective miniaturized triaxial SERF atom magnetometer device, which is characterized in that single pump light is guided into a probe by a polarization maintaining optical fiber; and then one beam of pump light is divided into two beams of circular polarization pump light with the same light intensity by using a half-wave plate, a polarization splitting prism, a right-angle reflector and a quarter-wave plate, and then the two beams of circular polarization pump light vertically pass through the same alkali metal gas chamber. After the pump light penetrating through the air chamber passes through the semi-transparent and semi-reflective flat beam splitter, one half of the pump light is detected by the photoelectric detector and used for extracting magnetic field information, and the other half of the pump light returns to the original path and passes through the alkali metal air chamber for the second time. According to the invention, high-sensitivity simultaneous measurement of a three-axis magnetic field of the miniaturized three-axis SERF atom magnetometer is realized, the atomic spin polarizability is enhanced, the uniformity of the atomic spin polarizability in the air chamber is improved, and the technical problem of spin polarizability uniformity in miniaturized application of the SERF atom magnetometer is solved; and the application of the array type triaxial SERF atom magnetometer in the fields of magnetocardiography, brain magnetism and the like is facilitated.

The invention relates to the technical field of artificial electromagnetic metasurfaces, in particular to a full-space multifunctional terahertz metasurface. The metasurface is composed of a plurality of metasurface units arranged periodically, and each metasurface unit sequentially comprises a first metal structure layer, a first middle dielectric layer, a grating layer, a second middle dielectric layer and a second metal structure layer from top to bottom. The first metal structure layer and the second metal structure layer are the same in structure and each comprise two C-shaped metal rings, and the two C-shaped metal rings are connected in a staggered mode to form a disconnected and staggered S shape. The first intermediate dielectric layer and the second intermediate dielectric layer are consistent in thickness; the grating layer comprises vanadium dioxide and copper which are alternately arranged, and multifunctional dynamic regulation and control of transmission, reflection and the whole space are achieved by controlling phase change of the vanadium dioxide. The metasurface provided by the invention can respectively realize the functions of polarization conversion, linear-circular polarization wave conversion, circular dichroism, asymmetric transmission and the like in different states.

The invention specifically discloses a circular polarization selection type wavefront shaping device of a terahertz wave band and a use method, and relates to the technical field of terahertz application. The device comprises a dielectric substrate layer and a dielectric cylinder microstructure layer, wherein the dielectric cylinder microstructure layer is arranged at the top of the dielectric substrate layer; the dielectric cylinder microstructure layer is composed of supramolecular dielectric cylinders arranged in an array mode, and each supramolecular dielectric cylinder is composed of a first dielectric cylinder superatom and a second dielectric cylinder superatom which are different in size. The first dielectric cylinder superatoms and the second dielectric cylinder superatoms are of sub-wavelength structures, and the distances between the dielectric cylinder superatoms in the adjacent rows and between the dielectric cylinder superatoms in the adjacent columns are smaller than the wavelength of incident terahertz waves. The first dielectric cylinder super atoms and the second dielectric cylinder super atoms and the corresponding substrates form geometric phase units respectively, and the dielectric cylinder rotation angles of the first dielectric cylinder super atoms and the second dielectric cylinder super atoms change along with coordinates. The device realizes selection and wavefront shaping of right-handed or left-handed circularly polarized terahertz waves, and can be widely applied to the fields of terahertz polarization spectrum measurement and imaging.

The invention discloses a wide-angle scanning transmit-receive duplex common-aperture phased-array antenna, and belongs to the technical field of spaceborne antennas. The phased-array antenna is formed by periodically arranging and expanding a plurality of basic common-aperture units to form a dual-band dual-circular polarization structure. Each basic common-caliber unit comprises a receiving antenna unit, a transmitting antenna unit and a short-circuit grounding pi-type decoupling network. The transmitting-receiving common-caliber phased array antenna has the advantages of high unit isolation and large array scanning angle, and can meet the requirements of satellite communication, remote sensing and telemetering, mobile phone direct connection satellite communication and the like on a wide-angle scanning transmitting-receiving duplex common-caliber phased array.

The invention discloses a dual-beam dual-circularly-polarized wide-angle scanning phased-array antenna, and belongs to the field of wireless communication. The antenna is composed of an antenna unit group. The antenna unit comprises a bottom metal floor, a fifth substrate, a 3dB bridge, a fourth substrate, an antenna metal floor, a third substrate, a second rectangular feeder line, a second substrate, a first rectangular feeder line, a first substrate and a radiation patch layer which are arranged from bottom to top; wherein the 3dB bridge is used for realizing signal transmission, and the two rectangular feeder lines have the same size and are orthogonally arranged; the radiation patch layer comprises four square metal patches and two feed discs; the square metal patches are separated through the L-shaped gaps and are connected with the antenna metal floor through the short circuit columns respectively, and the feed disc is connected with the rectangular feed line through the metal probe and connected to the output end of the 3dB bridge. The antenna unit adopts an equivalent magnetoelectric dipole form, the wide-angle scanning characteristic of the phased-array antenna is achieved, communication with two satellites can be achieved at the same time, and the overall communication efficiency is improved.

The invention provides a metasurface based on spin decoupling and a preparation method thereof. The metasurface comprises a substrate layer and a plurality of rectangular nano columns located on the substrate layer. Wherein the lengths, the widths and the rotation angles of the rectangular nano-columns are different, and the rectangular nano-columns have high transmittance and [0, 2pi] all-phase coverage and meet the conditions of a half-wave plate; the plurality of rectangular nanorods regulate and control the left-handed circularly polarized light and the right-handed circularly polarized light through a preset phase, so that a preset function is realized; the preset phase comprises a propagation phase and a geometric phase. According to the metasurface provided by the invention, the substrate layer and the rectangular nanorod array with various sizes and different rotation angles are fused, so that accurate and independent phase regulation and control on the circular polarization state of incident light are realized, and the constraint of mutual interference of spinning states in a traditional optical element is thoroughly eliminated; different circularly polarized light signals can be distinguished and independently processed under a single wavelength, and the optical regulation degree of freedom is shown.

The invention discloses a millimeter wave circular polarization ridge gap waveguide antenna. The waveguide antenna comprises a feed waveguide layer, a waveguide gap layer, a grating lobe suppressor, a polarization converter and a radiation cavity layer which are sequentially stacked from bottom to top. The waveguide antenna adopts an interdigital ridge structure, so that electromagnetic wave leakage radiation can be effectively inhibited, the stability of the working mode of the antenna unit is ensured, and the isolation of the antenna in a large-scale array is enhanced; the feed waveguide layer and the waveguide slot layer are spliced to form the interdigital ridge structure, the production and assembly process is simple, the welding process is omitted, and the production cost is reduced; left-hand circular polarization or right-hand circular polarization can be switched on the polarization converter by changing the orientation of the cross-type gap. By feeding from the two ends of the feed waveguide layer, a dual-circular-polarization working mode can also be realized; by adjusting the size of each slot on the waveguide slot layer, the flexibility of grating lobe suppression can be improved, and the side lobe level of the antenna can be reduced. The invention relates to the technical field of antennas.

The invention discloses a dual circularly polarized common aperture phased array antenna applied to low orbit satellite communication, comprising M * N antenna array sub-arrays, the M * N antenna array sub-arrays are uniformly distributed in M rows and N columns, each antenna array sub-array comprises four antenna units, the four antenna units are uniformly distributed in 2 rows and 2 columns, any antenna unit can completely coincide with the other three antenna units when rotating by a certain angle with the central axis of the antenna array sub-array as the rotating axis, and the first antenna unit comprises a combined radiation layer, a first copper plate, a coupler layer and a second copper plate which are arranged from top to bottom. The coupler layer adopts an orthogonal coupler realized based on a short-circuit three-branch structure to convert an external radio-frequency signal into two radio-frequency signals with a phase difference of 90 degrees, and the two radio-frequency signals are transmitted to the combined radiation layer; the combined radiation layer adopts a linear dipole radiator with separated upper and lower parts to realize broadband design; the broadband wide-angle scanning device has the advantages of being capable of achieving wide-angle scanning, wide in frequency band, simple in overall structure and low in manufacturing cost.

The invention discloses an ultra-compact near-infrared circularly polarized photoelectric detector, which comprises an upper metal electrode plating layer, a lower metal electrode plating layer, a semiconductor substrate, a hexagonal close packing array substrate and a chiral super-surface layer, and can realize rapid and high-responsivity near-infrared circular polarization dependent light detection, and light signals can be directly converted into visible electric signals under zero bias voltage; different photoelectric signal conversion effects can be generated from different directions under irradiation of light with different wavelengths, and reference is provided for preparation of a multi-mode near-infrared circularly polarized photoelectric detector. The invention also discloses a preparation method of the ultra-compact near-infrared circularly polarized photoelectric detector, the preparation method is simple and convenient, the cost is relatively low, batch preparation can be realized, and the produced ultra-compact near-infrared circularly polarized photoelectric detector has the characteristics of high light absorbance, quick response and ultrahigh integration level.

The invention discloses a multi-mode circularly polarized OAM (orbital angular momentum) filtering antenna based on an artificial surface plasmon. According to the antenna, the SSPP leaky-wave antenna and the HMSIPW filter are integrated, so that efficient emission of multi-mode OAM beams is realized, and the antenna has low axial ratio, high gain and good directional diagram matching performance; the SSPP leaky-wave antenna is composed of an Archimedes spiral line type SSPP waveguide and annularly distributed patches, wherein the SSPP waveguide realizes accurate regulation and control of dispersion characteristics through the combination of periodic sawtooth comb lines and uniform spiral lines; the HMSIPW filter is composed of a dielectric substrate layer, a metalized through hole and a gradient rectangular structure, impedance matching of a micro-strip and double lines is achieved, insertion loss is reduced, and radiation performance is improved. Compared with a traditional design, a filtering function is integrated, higher harmonic radiation and low-purity high-mode OAM are inhibited through the overall design, and selectivity and radiation energy uniformity are improved.

The invention relates to the technical field of electroluminescent photoelectric devices, in particular to a photoelectric device based on electro-circular polarization luminescence of a single chiral rare earth complex molecule and a preparation method of the photoelectric device. A spin Hall effect detection layer of the photoelectric device comprises a platinum film and a non-magnetic metal detection electrode; the non-magnetic metal detection electrode is arranged on the side edge of the platinum film in the length direction; the graphene point electrode is arranged on the side edge of the upper surface of the insulating layer in the width direction, the two ends of the molecular heterojunction are connected with the graphene point electrode through amido bonds to form a graphene point electrode-molecular heterojunction array, and the magnetic metal electrode is arranged on the outer side edge of the upper surface of the graphene point electrode in the width direction. According to the photoelectric device, the excellent photoelectric property of the rare earth complex is combined with the molecular electronics technology, the detection sensitivity of the photoelectric device on the single molecule level is improved, the preparation method is mild in reaction condition and easy to operate, and application and popularization of the photoelectric device are facilitated.

The invention relates to a high-efficiency near-ultraviolet heat exciton compound with circular polarization property and application of the high-efficiency near-ultraviolet heat exciton compound in preparation of a circular polarization organic electroluminescent device, and belongs to the technical field of organic photoelectric materials. The organic electroluminescent material is a high-efficiency near-ultraviolet heat exciton compound with circular polarization property, nine pairs of near-ultraviolet enantiomers are successfully designed and synthesized by combining chiral group binaphthol with fluorene with high luminous efficiency, and the nine pairs of near-ultraviolet enantiomers all show obvious circular polarization luminous property and high fluorescence quantum yield. The electroluminescent devices prepared based on the nine pairs of near ultraviolet enantiomers all show near ultraviolet emission, and the external quantum efficiency is 3.9%, 3.1%, 4.5%, 7.5%, 6.3%, 5.0%, 10.3%, 9.2% and 11.6% respectively. A new visual angle is provided for developing a near ultraviolet heat exciton material with circular polarization luminescence and high efficiency at the same time, and 3D and wide color gamut display can be directly achieved in the future.

The invention provides a functional composite one-dimensional metal cavity slot array antenna, which belongs to the field of antennae, and comprises a feed cavity and a cover plate located at the top of the feed cavity, a plurality of groups of periodic intermediate-frequency anti-interference metal blocks and high-frequency anti-interference metal blocks are arranged in the feed cavity, and a radiation slot is formed in the cover plate. The polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open manner to form an undulating shape; an antenna array is also provided. An anti-interference periodic structure is embedded in the feed cavity, the antenna is endowed with anti-interference capacity in multiple different frequency bands, the polarization conversion structures are arranged on the two sides of the radiation slot in a stepped and open mode to form an undulating shape, an electromagnetic signal is input into the feed cavity, linearly polarized electromagnetic waves are radiated outwards through the radiation slot, and the antenna is formed. Linear polarization electromagnetic waves are decomposed into a group of orthogonal components with the same amplitude after passing through the polarization conversion structure, a 90-degree phase difference exists between the two components, circular polarization is formed to radiate towards the space, the polarization conversion structure is simple in structure and convenient to process, and the scattering characteristic of the antenna is improved.

The invention discloses a low-profile dual-circularly polarized wave beam scanning folding reflection array antenna. The low-profile dual-circularly polarized wave beam scanning folding reflective array antenna comprises a lower reflective array antenna and an upper circularly polarized selection metasurface. A circular polarization plane feed source is integrated in the middle of the reflective array antenna, and beam deflection is achieved. The circular polarization selection metasurface introduces opposite phase gradients to a left-hand circular polarization wave beam and a right-hand circular polarization wave beam through spin decoupling, and then introduces opposite wave beam deflection angles. Meanwhile, due to the polarization selection function of the circular polarization selection metasurface, the profile height of the antenna is half of the focal length of a traditional reflective array. By rotating the lower-layer reflective array antenna and the upper-layer circular polarization selection metasurface, the antenna can realize simultaneous + / -42-degree pitch angle scanning and 360-degree azimuth angle scanning of left-hand circular polarization and right-hand circular polarization dual beams, and the aperture efficiency, the axial ratio, the scanning loss and other performances are good. The low-profile dual-circularly-polarized wave beam scanning folding reflection array antenna provided by the invention can realize simultaneous scanning of two circularly-polarized wave beams, and is low in profile, compact in structure, low in cost and novel in function.

The invention discloses an ultra-low profile broadband circularly polarized microstrip patch antenna array and a design method thereof, the antenna array is constructed on a single-layer thin dielectric substrate, and an antenna unit is formed by combining a substrate integrated waveguide resonant cavity and a microstrip patch resonator embedded in the center of the substrate integrated waveguide resonant cavity. On the premise that the antenna size is not increased, the combination of the double resonators is realized. The adjacent antenna units are arranged at zero intervals and share the metal columns surrounding the edge of the substrate integrated waveguide resonant cavity. Two pairs of polarization orthogonal degenerate modes with similar resonance characteristics are introduced by utilizing a central gap, an annular gap and four symmetrical gaps connected with the central gap and the annular gap, so that four resonance points with similar radiation characteristics and similar resonance frequencies and two axial ratio zero points are formed, and synchronous broadening of impedance bandwidth and axial ratio bandwidth is realized. In addition, a radiation zero point is generated at the position close to the upper edge of the passband along the radiation counteracting effect on the two sides of the annular gap, and therefore the out-of-band rejection performance of the antenna is improved.

The invention relates to the technical field of organic and inorganic hybrid functional materials, in particular to a doped chiral metal halide material with light-induced circular polarization luminescence and a preparation method and application of the doped chiral metal halide material, the chemical formula of the doped chiral metal halide material is L2BnC1-nX4, and the value of n is 0 lt; n is less than 1. The fluorescence quantum yield of a film sample is remarkably improved by using a transition metal ion or rare earth ion doping method. According to the invention, the plug splitting energy in the chiral metal halide is adjusted, so that the chiral optical property of the film material is remarkably improved. The preparation process of the chiral metal halide thin film is simple, the thin film does not need to be prepared after a single crystal material is obtained through a harsh single crystal preparation method, and the material composition and the doping proportion can be easily adjusted according to the requirements of material properties. The invention provides a feasible way for regulating and controlling the chiral optical property of the chiral metal halide by doping transition metal ions or rare earth ions.

The present invention discloses a broadband 1-bit reconfigurable circularly polarized reflectarray antenna based on a multi-resonant structure, which includes a reconfigurable circularly polarized reflection functional layer, a circularly polarized horn antenna, and an acrylic bracket. The reconfigurable circularly polarized reflection functional layer is composed of M×N circularly polarized reflectarray antenna elements with the same structure, which are periodically arranged at an interval of 0.4125λ0. The circularly polarized reflectarray antenna element consists of a radiation layer and a DC bias layer. The radiation layer includes a circuit pattern designed based on a multi-resonant structure, PIN diodes, a radiation dielectric layer, and a reflection bottom plate. The DC bias structure includes a DC bias dielectric layer and a DC bias circuit. By controlling the on-off states of four PIN diodes, 1-bit regulation of the unit reflection phase can be achieved. By adjusting the states of each circularly polarized reflectarray antenna element, a beam scanning function of ±60° can be realized, and it can be applied in wireless communication and satellite communication systems.

The embodiments relate to the technical field of optoelectronic devices and to a circular polarization-resolved photonic artificial synapse (CPL-resolved PAS) device and a preparation method therefor. The CPL-resolved PAS device includes a heterostructure based on a helical chiral perovskite (H-PVK) and a single-wall carbon nanotube (SWNT). The heterostructure includes a H-PVK layer and a SWNT layer. The H-PVK layer and the SWNT layer contact and overlap, and a heterojunction is formed between the H-PVK layer and the SWNT layer. Using the chiral optoelectronic response characteristics of the H-PVK and the carrier conduction characteristics of the SWNT, the heterostructure is able to achieve nano-ampere-level distinguishable photocurrent response for circular-polarization UV light with different chirality. The CPL-resolved PAS device obtained by the present disclosure has good stability and can be prepared on a large scale.

The invention discloses a low-profile and high-integration broadband dual-circularly-polarized transceiving common-aperture phased-array antenna, which adopts a multi-layer PCB (Printed Circuit Board) laminated structure, comprises a radiation patch layer, a quasi-rectangular patch layer, a metal reflection ground layer and a feed layer from top to bottom, and is combined with a metalized blind hole and a buried hole to form a complete coupling path. A U-shaped groove, a U-shaped metal strip and a C-shaped groove are integrated on a metal reflection ground, and a staggered groove is loaded on a quasi-rectangular patch, so that a K / Ka dual-band separated dual-coupled feed structure is realized, and dual circularly polarized radiation is obtained under the same aperture. The antenna is further provided with outer ring and inner ring plated-through hole arrays, the outer ring plated-through hole arrays are used for constructing an isolation area to improve the isolation degree between wavebands, and the inner ring plated-through hole arrays introduce a horizontal electric field component to improve the circular polarization purity and expand the axial ratio bandwidth. Wide impedance bandwidth and wide axial ratio bandwidth are realized in the K wave band and the Ka wave band, the isolation degree is high, the profile is low, the structure is compact, and the broadband phased array antenna is suitable for broadband phased array systems such as satellite communication terminals and mobile platforms.

The invention discloses an antenna unit radiator, a circularly polarized phased-array antenna unit and an antenna array, and belongs to the technical field of antennas. The circularly polarized phased-array antenna unit comprises an antenna unit radiator, a first dielectric layer, a metal patch, a second dielectric layer, a third dielectric layer and a metal ground layer which are arranged in sequence; two L-shaped microstrip probes which are orthogonally arranged are laid on the top of the third dielectric layer; the third dielectric layer is internally provided with feed metal columns in one-to-one correspondence with the L-shaped microstrip probes, the top ends of the feed metal columns are connected with the corresponding L-shaped microstrip probes, and the bottom ends of the feed metal columns are provided with feed ports. The antenna array is formed by the antenna unit array. The working bandwidth of the antenna can be expanded, the defect of the narrow-band characteristic of the microstrip antenna is overcome, the degree of freedom of design of the phased-array antenna is improved, impedance matching is facilitated, and the circular polarization performance of the phased-array antenna array is greatly improved.

The invention relates to a millimeter wave broadband circularly polarized filtering antenna, which belongs to the technical field of wireless energy transmission and comprises an upper dielectric substrate, a lower dielectric substrate, an upper metal floor, a middle metal floor, a lower metal floor, a top patch array, cavity columns and short circuit via holes. The bottom metal floor is arranged on the lower surface of the lower dielectric substrate; the middle-layer metal floor is arranged on the upper surface of the lower-layer dielectric substrate; the upper-layer metal floor is arranged on the lower surface of the upper-layer dielectric substrate; the top-layer patch array is arranged on the upper surface of the upper-layer dielectric substrate; the cavity column penetrates through the middle-layer metal floor, the lower-layer dielectric substrate and the bottom-layer metal floor to define an I-shaped SIW cavity; a feed hole is formed in the I-shaped SIW cavity; the short-circuit via hole penetrates through the top-layer patch array, the upper-layer dielectric substrate and the upper-layer metal floor; and two same rectangular coupling grooves are respectively etched in the middle parts of the upper-layer metal floor and the middle-layer metal floor.

The invention discloses an image acquisition method and system for a dual-wavelength circular polarization camera, and the method comprises the steps: setting two independent nanosecond pulse laser sources, and respectively transmitting lasers with different wavelengths; respectively carrying out left-hand circular polarization and right-hand circular polarization treatment on the two lasers; integrating the two nanosecond pulse laser beams subjected to circular polarization treatment into one beam, wherein the two beams are completely overlapped and are coaxial; the integrated nanosecond pulse laser beams are irradiated to a target object, and reflected light is collected through a double-spectrum camera to form two images with different wavelengths; and distributing weights for the image according to the importance of the polarization information, and generating a comprehensive image by adopting an image fusion technology. According to the image acquisition method and system of the dual-wavelength circular polarization camera, two independent nanosecond pulse laser sources are arranged to emit short-wavelength laser and long-wavelength laser respectively, the two beams of laser are subjected to left-handed and right-handed circular polarization processing and then integrated into one beam, and efficient imaging in a complex environment is achieved.

An electronic device is presented comprising: at least one basic block, and a control circuit. Each basic block comprises an active unit configured and operable to be responsive to one of circularly polarized electromagnetic field or circularly polarized spin current by a change in magnetization orientation in the active unit. The control circuit is configured and operable to carry out one of the following: (i) monitoring changes in at least one electrical property of the active unit to thereby monitor the change in magnetization orientation in the active unit in response to the circularly polarized electromagnetic field being applied to the active unit, or (ii) managing generation of the circularly polarized spin current in the active unit to thereby induce said change in the magnetization orientation in the active unit.