9 results about "Circular polarization" patented technology

Curved lenses configured to decode three dimensional content and method of fabricating the same. The lenses comprise a polyvinylalcohol polarizer film laminated with triacetate on both sides, wherein the polarizer film has a polarizing efficiency equal to or exceeding 99% and a transmittance percentage equal to or exceeding 35% and a retarder film (e.g., norbornene copolymer resin) laminated on a front surface of the polyvinylalcohol polarizer film laminated with triacetate and aligned to produce a desired circular polarization responsive to specified retardation wavelengths.

The invention discloses a light circular-polarization modulator, including a light input coupler, a light output coupler and at least a birefringent regulable crystal, where the crystal can change the shape or major axis orientation of its refractive index ellipsoid under the action of electric, magnetic, temperature and light fields or force, by this characteristic, able to modulate levorotary and dextral circularly-polarized lights, thus realizing the convenient and practical effect, and mainly applied to chiral substance detection and identification, communication coding and optical teaching.

This invention discloses an optical system design, which is used in a liquid crystal display apparatus. The optical system design at least comprises a light generation module, a circular polarization module and a liquid crystal light valve, wherein the light generation module is used to generate a light, the circular polarization module is used to modulate the polarization state of the light to a circular polarization state, and the liquid crystal light valve is used to modulate the polarization state of the light, so as to modulate the intensity of the light to show the image. The optical system design is able to solve the problem of fringing-field effects.

The present invention provides a dual-band circular polarization selector and a preparation method thereof. The dual-band circular polarization selector comprises a dielectric substrate, a dielectricplate arranged on the dielectric substrate, a metal split resonant ring arranged on the surface of the dielectric plate, and a metal antenna arranged on the dielectric substrate, wherein an included angle is between the planes where the dielectric substrate and the dielectric plate are located. The dual-band circular polarization selector is a dual-band and miniaturized circular polarizer, the degree of integration is high, and the range of operating frequency is wide.

The invention discloses a magnetoelectric dipole broadband polarization torsion lens antenna and a phase compensation method thereof. The lens antenna comprises a transmitting antenna and a receiving antenna, wherein the transmitting antenna is composed of a top metal layer, a first dielectric layer, a second metal layer, a first bonding layer, a second dielectric layer and a third metal layer, and the receiving antenna is composed of a fourth metal layer, a third dielectric layer, a third bonding layer, a fifth metal layer, a fourth dielectric layer and a bottom metal layer. A conical medium coating layer is arranged at the upper end of the transmitting antenna and is mainly used for increasing the phase adjusting range; the surface of the top metal layer is provided with an electric dipole, and a magnetic dipole and a central feed structure are also arranged. The conversion from linear polarized waves to circularly polarized waves is flexibly realized by adopting a sequential rotation scheme on a transmitting antenna layer, and a super 2-bit phase compensation scheme is specifically provided, so that relatively wide 3-dB gain and AR overlapping bandwidth (47%) are realized, and only sub-wavelength profile height is realized.

The invention discloses a microwave power amplifier capable of realizing polarization mode selection, which comprises a power divider, a first amplification branch consisting of a first phase shift control module and a first amplifier module, a second amplification branch consisting of a second phase shift control module and a second amplifier module, and a 90-degree bridge, a first signal and a second signal which are respectively generated by the power divider output to the first amplification branch and the second amplification branch are input to the 90-degree bridge, and radio frequency signal output is carried out by the horizontal polarized antenna and the vertical polarized antenna which are connected with the 90-degree bridge. The working states of the first amplifier module and the second amplifier module are controlled by controlling the phase shift quantity output of the first phase shift control module and the second phase shift control module, so that output control of circularly polarized waves, horizontal polarization, vertical polarization, linear polarization, left-hand circular polarization and right-hand circular polarization is realized, low-cost multi-polarization selection is realized, and the multi-polarization selection is realized. The problem of power loss during horizontal polarization and vertical polarization is solved.

The invention discloses a circularly polarized patch antenna. The antenna is designed on a dielectric substrate of any dielectric constant. One side of the dielectric substrate is a metal ground, andthe other side of the dielectric substrate is a fan-shaped radiation patch. A radius side of the radiation patch is connected to the metal ground through a short-circuit wall. The surface of the patchis connected to the metal ground through a short-circuit nail. Further, a rectangular groove is disposed on the surface of the radiation patch. The circularly polarized patch antenna can maintain aninherent low-profile property, has a good circular polarization characteristic and has a certain angle between the maximum radiation direction and the vertical plane of the antenna, that is, exhibitsa tilted circularly polarized beam radiation characteristic. The antenna uses coaxial feeding, has the advantages of simple structure, small volume, low profile and high bandwidth, and can achieve good oblique beam circular polarization performance.

The invention belongs to a sum-difference network, and provides a dual-circular-polarization sum-difference network in order to solve the technical problem that in an existing sum-difference network structure, modules are connected through cables, and the debugging difficulty is increased. Comprising a first dielectric plate, a first bonding plate, a second dielectric plate, a second bonding plate, a third dielectric plate, a third bonding plate and a fourth dielectric plate which are sequentially stacked, metal grounding structures are printed on the two sides of the first dielectric plate, the side, close to the second bonding plate, of the second dielectric plate, the side, close to the second bonding plate, of the third dielectric plate and the two sides of the fourth dielectric plate, and a levorotation sum-difference network structure is printed on the surface, close to the first bonding plate, of the second dielectric plate. A right-handed rotation sum-difference network structure is printed on the surface, close to the third bonding plate, of the third dielectric plate, feed holes are formed in the left-handed rotation sum-difference network structure on the second dielectric plate, and feed through holes which are communicated with one another are formed in the positions, corresponding to the feed holes, of the second bonding plate, the third dielectric plate, the third bonding plate and the fourth dielectric plate.