69 results about "Electric dipole moment" patented technology

The invention belongs to the field of satellite mobile communication and relates to a circularly polarized antenna design, in particular to a circularly polarized dipole antenna for satellite communication. The circularly polarized dipole antenna has the advantages of wide band, wide wave beam and good low-elevation angle circular polarization performance. The circularly polarized dipole antenna comprises a dielectric substrate, a metal reflecting plate, four dipole antenna radiation arms, four parasitic patches, four metal conductive walls and a coaxial feeder; the conductive walls capable ofbroadening lobes are applied to the circularly polarized crossed dipole antenna in a combined manner; the metal reflecting ground plate, the conductive walls and the parasitic patches jointly form magnetic dipole antennas; lobe broadening is carried out on the basis of the complementation of the radiation patterns of the magnetic dipoles and the electric dipoles, so that gain at a low elevation angle can be improved; and thus, the circularly polarized dipole antenna for satellite communication has the advantages of wide band, wide wave beam, low elevation angle, good circular polarization performance, simple structure and easiness in installation, and is more suitable for satellite communication.

An electronic device may include a poled superlattice comprising a plurality of stacked groups of layers and having a net electrical dipole moment. Each group of layers of the poled superlattice may include a plurality of stacked semiconductor monolayers defining a base semiconductor portion and at least one non-semiconductor monolayer thereon. The at least one non-semiconductor monolayer may be constrained within a crystal lattice of adjacent base semiconductor portions, and at least some semiconductor atoms from opposing base semiconductor portions may be chemically bound together through the at least one non-semiconductor monolayer therebetween. The electronic device may further include at least one electrode coupled to the poled superlattice.

A method of use of an ionic liquid for sorption of a gas having an electric multipole moment is provided, wherein the ionic liquid comprises an anion and a non-aromatic cation. In particular, the electric multipole moment may be an electric dipole moment and/or an electric quadrupole moment. The sorption may be an adsorption or an absorption. The ionic liquid may be a pure ionic liquid, i.e. a liquid substantially only containing anions and cations, while not containing other components, e.g. water. Alternatively a solution containing the ionic liquid and a solvent or further compound, e.g. water, may be used.

A method for producing an organic semiconductor device (110) having at least one organic semiconducting material (122) and at least two electrodes (114) adapted to support an electric charge carrier transport through the organic semiconducting material (122) is disclosed. The organic semiconducting material (122) intrinsically has ambipolar semiconducting properties. The method comprises at least one step of generating at least one intermediate layer (120) which at least partially is interposed between the organic semiconducting material (122) and at least one of the electrodes (114) of the organic semiconductor device (110). The intermediate layer (120) comprises at least one thiol compound having the general formula HS—R, wherein R is an organic residue. The thiol compound has an electric dipole moment pointing away from the SH-group of the thiol compound. The electric dipole moment has at least the same magnitude as the electric dipole moment in 4-Phenylthiophenol. By the intermediate layer (120) an ambipolar charge carrier transport between the electrodes (114) is suppressed in favor of a unipolar charge carrier transport.

The invention brings forward an optical nanometer antenna with dual unidirectivity, and a design method thereof. A basic unit of the optical nanometer antenna is composed of a metal-dielectric-metal sandwich type structure, and under excitation of incident planar waves, the structure excites two different surface plasma resonance modes, i.e., electric dipolar resonance and magnetic dipolar resonance. Through a multistage decomposition method, a generalized Kerker condition (i.e., an electric dipole and a magnetic dipole are equivalent) for forward scattering and backward scattering is given. Besides, the influence of the nanometer antenna on far-field radiation of an electric dipole source is also argued, and for an array type metal-dielectric-metal nanometer structure, the excitation position of a dipolar radiation source plays a crucial role in deciding whether the antenna has dual unidirectivity. A theoretical base and a reference standard are provided for design of a nanometer optical device.

The present invention provides a base station antenna and base station radio frequency equipment, including an antenna unit, the antenna unit includes: an electric dipole, including N centrosymmetric radiation pieces, each of the radiation pieces is provided with a notch structure, wherein Said N is an even number greater than 4; the magnetic dipole includes a short-circuit wall for grounding and located on the first side of the plane where the electric dipole is located, and the short-circuit wall is coupled to the radiation sheet; the power feed part includes N/2 Feeding probes in the shape of "ㄇ" and overlapping at the symmetrical center of the electric dipole, each feeding probe part is coupled with the electric dipole, and the two ends of each feeding probe are from where the electric dipole is located. The plane extends toward the first side; and the resonant plate is arranged in the space enclosed by the "ㄇ"-shaped feeding probe. The invention enables the overall translation of the frequency band of the antenna, further reduces the height of the antenna, greatly reduces the volume of the antenna, realizes the miniaturization of the low profile of the antenna, and reduces the production cost of the antenna at the same time.

A method for generating electromagnetic waves in the ELF/ULF comprising the steps of using a ground-based Horizontal Electric Dipole (HED) antenna to send electromagnetic pulses upwardly in the E-region of the ionosphere to form an oscillatory or pulsed electric field; allowing said pulsed electric field to interact with magnetized plasma of the lower ionosphere to generate a pulsed horizontal and vertical current which have associated Horizontal and Vertical Electric Dipole moment; and allowing them to radiate.

A document verification scheme embeds in or deposits on a substrate/document a random distribution of dielectric particles that effectively create a unique electronically detectable signature. The dielectric constant of the particles is sufficiently larger than that of the substrate/document, so as to exhibit molecular level electric dipole moments, which cause a detectable modification of an external electric field passing through the substrate. Electronic signature verification is effected by comparing the digitized output of an electric field modification sensor with a digital code that has been stored previously in the data base. As long as the substrate containing the dielectric particle signature has not been altered, its randomly distributed capacitance characteristic will remain unchanged, and the two digital signatures seen by the comparator will effectively match one another, verifying authentication of the substrate. However, alteration of the substrate and thereby the particle distribution will modify the capacitance characteristic associated with the randomly distributed particles and cause the comparator to be presented with two diverse digital signatures—indicating tampering.

The invention discloses a cathode interface modification material, and a solar cell as well as a preparation method and application thereof. The cathode interface modification material is prepared from poly [9,9-bis(3'-(N,N-dimethylamino) propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN) and/or derivatives of the PFN. The organic thin film solar cell comprises a top electrode layer, a cathode interface modification layer, a light absorption active layer, a hole transport layer and a bottom electrode which are sequentially arranged in the set direction, wherein the cathode interface modification layer is prepared from the cathode interface modification material. The cathode interface modification material provided by the invention adopts the PFN with a permanent electric dipole moment to modify the interface of a cathode of the organic thin film solar cell, namely, a suitable electron transport layer is inserted into the organic thin film solar cell, so that a built-in electricfield is effectively enhanced, carrier transport is further improved, and recombination loss is reduced; the cathode interface modification material can reduce the cathode work function, reduce the electron injection barrier and improve the electron injection efficiency, thereby greatly improving the luminous efficiency, service life and stability of the device, and further increasing the cell efficiency.

The embodiment of the invention discloses a nonlinear nanoantenna scattering directivity control method, device and equipment, and a computer readable storage medium. The method comprises the steps: adding a plane electromagnetic wave to a dimer nanoantenna which is formed in a manner that first dielectric material particles and nonlinear graphene wrap second dielectric material particles, and calculating dynamical nonlinear equations for describing the electric dipole moment of the dimer nanoantenna; calculating the dipole scattering intensity of the dimer nanoantenna according to the nonlinear equations; Adjusting the geometric parameters of the dimer nanoantenna and the conductivity parameter of graphene to enable the dipole scattering of the dimer nanoantenna to be in a bistable stateunder the preset frequency of the plane electromagnetic wave, adjusting the electric field amplitude of the plane electromagnetic wave applied to the dimer nanoantenna, so as to enable the scatteringstate of the dimer nanoantenna to be switched between a first directional scattering state and a second directional scattering state. According to the invention, the method achieves the controllable operation of the scattering direction of a nonlinear optical nanoantenna in a time evolution process.

The invention relates to an underwater target tracking method based on electromagnetic field feature multi-information fusion. The method comprises the steps of arranging a plurality of magnetic fieldsensors and electric field measurement electrodes in an array mode, obtaining the three-direction coordinate position initial solution of an underwater target, a magnetic dipole moment and an electric dipole moment through the calculation of a gradient positioning algorithm, establishing a state equation and an observation equation of the underwater target based on the underwater target electromagnetic field model, and performing nonlinear state estimation of the underwater target by adopting a particle swarm filtering algorithm to realize dynamic tracking of the underwater target. The methodis suitable for the field of underwater safety alert, and is good in algorithm adaptability and high in tracking precision.

The invention relates to an underwater target detection and positioning method based on array arrangement of electric field electrodes. According to the method, the electric field electrodes are arranged in an arc array, the electric field electrodes meeting a certain condition are combined to a detection array group, underwater target positioning parameters are respectively computed by differentdetection array groups through adopting an electric field positioning algorithm, and finally, the plurality of groups of underwater target positioning parameters are fused to obtain an accurate underwater target three-direction coordinate position and an electric dipole moment. The method is suitable for the field of underwater safety warning and has good algorithm adaptability and high positioning precision.

A modeling method for ship corrosion electric field based on DC point current source array model. Its characteristics are: select the DC point current source as the basic calculation unit to construct the data equation of the ship corrosion electric field model, part of the DC point current source is arranged at the position of the propeller and the auxiliary anode, and the other part is arranged at the underwater part of the ship at even intervals Both sides of the centerline. The effect and benefit of the present invention are that, compared with the electric dipole, the DC point current source can physically reflect the characteristics of the ship corrosion electric field source, can improve the stability of the ship corrosion electric field model, and can ensure the depth of the ship corrosion electric field , The accuracy of distance conversion.

The far zone “airwave” that arises when surveying subsea formations is greatly diminished by deployment of the transmitter combining mutually orthogonal horizontal electric and magnetic dipoles with the electric and magnetic dipole moments being locked in a special relationship. At each of the operating frequencies, the amplitude and phase characteristics of the transmitter electric and magnetic dipole moments are determined either from a supplementary measurement earned out using natural and/or controlled field sources, or by minimization of the vertical magnetic field at a remote receiver. Similar results can be obtained when data acquired in two independent surveys—one with the horizontal electric dipole transmitter pointing in one direction and another with a horizontal magnetic dipole transmitter pointing in the orthogonal direction and towed over the same or close positions—are linearly combined to minimize the vertical component of the combined magnetic field at remote receivers.

The invention discloses a huyghens source antenna. The huyghens source antenna comprises a dielectric substrate, a magnetic dipole, an excitation source, an electric dipole and a coaxial cable, wherein the dielectric substrate comprises a first surface and a second surface which are opposite to each other, the magnetic dipole is in contact with the first surface of the dielectric substrate, the excitation source is in contact with the second surface of the dielectric substrate, the electric dipole is arranged at one side of the second surface of the dielectric substrate, is arranged in parallel to the dielectric substrate and is separated from the dielectric substrate, and the coaxial cable is arranged in a groove hole formed in the electric dipole in a penetrating way and is connected with the excitation source. The huyghens source disclosed by the invention has the characteristics of low profile and favorable end emission radiation, is simple and compact in structure and is easy to process and fabricate, and the problems of relatively high profile, relatively low radiation efficiency and the like of an existing antenna are solved.