42 results about "Dipole mode" patented technology

RF-optical metamaterials with (±∈, ±μ) figures-of-merit of interest are constructed from coupled magnetic and dielectric multi-resonant multi-disks (finite-size cylinders) or multi-sphere lattices arranged in a periodic or a random fashion to offer tailored magnetic and electric dipole moments. The present metamaterials include embedded particles arrays that provide coupled magnetic and electronic modes equivalent to L (inductor) and C (capacitor) circuit models. Novel arrangements of these dipole modes (L and C) tailor the transfer function to the physics of interest.

The invention discloses a topological bulk laser based on an energy band inversion light field limiting effect and a method, being characterized in that a topological state photonic crystal which generates a dipole mode and a quadrupole mode near the center of a Brillouin zone and generates energy band reversing and a topological moderate state photonic crystal which does not generate energy bandreversing are adopted; the spliced boundary can generate reflection and limitation effects of a light field, and the boundary encircles to form a closed curve, so that a laser resonant cavity is formed in the boundary. According to the topological bulk laser based on an energy band inversion light field limiting effect and the method, single-mode vertical laser emission with high directivity, lowthreshold, narrow linewidth and high side-mode rejection ratio can be realized; the process difficulty and the preparation cost are reduced; the problems of heat dissipation and electric injection areimproved; the stability of components is improved, and the service life is prolonged; after copying to an electric injection active material system, the topological bulk laser based on an energy bandinversion light field limiting effect can obtain the vertical emitting laser with controllable size, high directivity, low threshold, narrow linewidth and high side mode rejection ratio; and the topological bulk laser based on an energy band inversion light field limiting effect can be applied to the fields of optical communication, solid-state lighting, laser radar, substance detection, medicaldiagnosis and the like.

A radio frequency identification (RFID) system for discs such as CDs, DVDs or minidiscs includes a special RFID transponder and antenna configuration. The discs normally include an outer metallized annular zone where information is stored, a central hole, and an inner annular zone between the hole and the outer annular zone. The transponder may be located in the inner annular zone, with antenna elements coupled to the transponder extending in opposite directions part way across the outer annular zone. Multilayer labels with a recess for the transponder chip, and antenna elements formed by conductive material may be employed to apply the RFID assembly to the discs. A monopole or dipole mode of antenna operation, prominently involving the metallized disc layer, results from the antenna configuration, and serves to more than double the range of the system.

An antenna and multi-antenna system are provided. Each antenna of the system is a mirror image and comprises first and second conductive elements each having a first end and a second end portion, the second end portions being capacitively coupled to each other. Each antenna can be operated as a lower-frequency folded dipole having a series capacitive gap which facilitates electrical lengthening of the antenna, or as a higher-frequency monopole antenna having a parasitic element which facilitates improved bandwidth. The antennas' feedpoints may be placed at opposite corners of a ground plane, and separated by a distance which is less than one quarter of an operating wavelength of the dipole but greater than one quarter of an operating wavelength of the monopole. Locating the feedpoints at the ground plane corners facilitates orthogonal polarization of the two antennas at least in dipole mode. The antennas thus provided exhibit good isolation.

An inventive antenna comprises two antenna elements forming a planar slotline antenna. The antenna furthermore comprises absorber elements surrounding the antenna elements on two layers. The absorber elements are shaped to partially cover the antenna elements and partially not cover the antenna elements. Moreover, they are shaped to dampen at least a dipole-mode of the antenna elements and not to dampen a slotline-mode of the antenna elements.

A method and system for beam deflection. The method and system for beam deflection comprises a compact superconducting RF cavity further comprising a waveguide comprising an open ended resonator volume configured to operate as a trapped dipole mode; a plurality of cells configured to provide a high operating gradient; at least two pairs of protrusions configured for lowering surface electric and magnetic fields; and a main power coupler positioned to optimize necessary coupling for an operating mode and damping lower dipole modes simultaneously.

A polarizing reflector for broadband antennas includes a flat dielectric substrate, a patch array layer formed by a bi-dimensionally periodic lattice of thin metallic patches along first and second perpendicular directions x, y, and a ground layer. All the patches have a same shape elongated along the second direction y and form electric dipoles when electrically excited along the second direction y. For each row the patches of the said row are interconnected by an elongated metallic strip oriented along the first direction x and having a width c. The geometry of the patch array, the thickness h and the dielectric permittivity εr of the substrate, and the width c of the elongated metallic strips are tuned so that the patch array including the elongated metallic strips induces a fundamental aperture mode and a complementary fundamental dipolar mode along two orthogonal TE and TM polarizations within a single operating frequency band or two separate operating frequency bands, and the differential phase between the two fundamental modes over the single or the first and second frequency bands being equal to +90° or to an odd integer multiple of ±90°. The polarizing reflector can comprise also a curved substrate and a patch array layer formed by a bi-dimensionally lattice of metallic patches along first curvilinear rows and second curvilinear columns.

The invention discloses a surface-enhanced infrared substrate based on a metamaterial and a molecular detection method thereof. The infrared substrate is sequentially provided with a supporting substrate, a uniform surface plasmon thin film and a periodic array; by regulating the period of the periodic array, the infrared The uniform surface plasmon thin film of the substrate is coupled with the electric dipole mode, so that the resonance wavelength of the latter changes, and the near-field electric field strength is enhanced; when the molecules to be measured are adsorbed or prepared on the infrared substrate, through the external infrared The spectroscopic equipment can be used to obtain the surface-enhanced infrared absorption spectrum of the molecule to be tested. The uniform surface plasmon thin film is made of a metal material or a dielectric material with a negative real part of the dielectric constant, and its thickness is greater than 200 nm. The detection methods are: (1) experimental test spectrum acquisition; (2) theoretical simulation spectrum acquisition; (3) evaluation function construction; (4) inversion solution; (5) result analysis.