42 results about "Dipole mode" patented technology

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.

RF-optical metamaterials with (±ε, ±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.

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 chip-like printed antenna in which an open end is formed by at least two antenna conductors separated from each other is mounted on a printed-circuit board. A ground required by one or plural other modules is disposed and mounted on the printed-circuit board so as to surround a remaining area of a surrounding area of the printed antenna except a partial area as indicated by oblique line parts. By this, in the printed-circuit board , a radiation electric field does not come to have a dipole mode, but is formed into a balloon shape and is radiated in one direction as indicated by a broken line.

The invention mainly belongs to the technical field of while-drilling logging, and specifically relates to a while-drilling azimuth acoustic logging device and a measurement method. The device is sequentially provided with a centering guide, a transmitting circuit, a transmitting transducer, a sound insulator, a receiving transducer array, a supersonic transducer and a receiving circuit on a drillcollar from a transmitting end to a receiving end. The device can work in a dipole mode or a polarized mode, and employs a fixed time interval measurement mode or an alternating time interval measurement mode according to the relation between the measurement time interval and the rotating speed of the device, so as to cover all fan regions around a well, and achieve the while-drilling azimuth acoustic measurement. The device solves the problems that all fan regions cannot be completely covered under the specific conditions of the fixed time interval measurement mode, rotating speed and measurement time interval, and the azimuth acoustic measurement cannot be achieved.

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 ε_r 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 embodiment of the invention provides an RFID label antenna with a metal-resisting characteristic. The RFID label antenna is characterized by comprising an artificial magnetic conductor structure floor, an antenna substrate and an antenna body, wherein the antenna body is attached above the antenna substrate, the antenna substrate is located above the artificial magnetic conductor structure floor, and a printed dipole mode is adopted for the antenna structure.

The invention discloses a dielectric resonator based on equivalent local area type surface plasmon polaritons and a working method thereof. The dielectric resonator comprises a dielectric column, a metal patch and metal wires, the metal wires are periodically arranged along the side surface of the dielectric column, the metal patch is attached to the upper and bottom surfaces of the dielectric column and is connected with the metal wires. The main mode of the dielectric resonator is an electric dipole mode of the effective surface plasmon polariton, when the electromagnetic wave is incident onthe resonator at a certain frequency, the effective localized surface plasmon polaritons can be generated on a junction surface of the dielectric column and the external air under the induction of the metal wires, so that effective localized surface plasma resonance is generated. The resonant frequency of the main mode of the dielectric resonator in the invention changes along with the change ofthe height of the resonator and the dielectric constant of the medium, but the resonant frequency of the main mode is not sensitive to the change of the diameter of the resonator. Therefore, the volume of the dielectric resonator in the invention can be multiple times smaller than that of the traditional dielectric resonator.

The invention provides an ultra-wideband planar antenna array applied to a millimeter wave communication system. The planar antenna array is composed of a plurality of antenna units arranged at equal intervals and a microstrip feed network. The antenna unit sequentially comprises a radiation patch, a first dielectric substrate, a bonding layer, a metal ground, a second dielectric substrate and a microstrip feeder line from top to bottom; the radiation patch is connected with the metal ground through four metal holes penetrating through the first dielectric substrate and the bonding layer; according to the design, the antenna unit can work in a dipole mode besides working in a patch mode. In the array environment, due to the mutual coupling effect between the units, another new medium resonance mode is excited at the same time. Therefore, the antenna unit provided by the invention can work in three resonant modes at the same time, so that the planar antenna array can realize ultra-wide working bandwidth, and the radiation in the working band is stable.

The invention provides a refractive index sensor based on an asymmetric nanostructure perfect absorber, a sensing test device and a sensing test method. The refractive index sensor comprises a substrate, a gold film, a spacing layer and a nanometer meniscus array, the gold film is evaporated on the substrate and is used for eliminating transmission; the spacing layer is arranged on the gold film and is used for spacing the gold film and the nano meniscus array; the nanometer meniscus array is arranged on the spacing layer, and when light irradiation and the nanometer meniscus array resonate, a local surface plasmon resonance dipole mode or a high-order mode is excited. According to the invention, by controlling and changing the polarization of incident light, different high-order local surface plasmon resonance modes are selectively excited by using the asymmetric nanometer meniscus perfect absorber, and the high-order plasmon resonance modes have relatively small radiation; and due to the perfect absorption property, the refractive index sensor utilizes inevitable loss in daily life, and transmission is reduced, so that the refractive index sensor has relatively high absorption, and the purposes of obtaining a narrow-band spectrum and improving the detection sensitivity of the sensing device are achieved.

The embodiment of the invention discloses a method and device for imaging an adjoining well by acoustic logging. The method comprises the following steps of collecting dipole longitudinal wave data infour orientations when a dipole sound source is excitated, wherein the dipole sound source is in an orthogonal dipole mode; obtaining dipole longitudinal wave data in a plurality of geographic orientations through vector rotation according to the collected dipole longitudinal wave data in four orientations; carrying out deconvolution filtering processing on the obtained dipole longitudinal wave data in each orientation to obtain filtered sound wave data; carrying out wave field separation on the filtered sound wave data to obtain separated upstream reflective longitudinal wave data and downstream reflective longitudinal wave data; carrying out migration imaging processing on the upstream reflective longitudinal wave data and the downstream reflective longitudinal wave data obtained by separating the wave field in each geographic orientation to obtain imaging data of a borehole of the adjoining well. According to the scheme, the adjoining well can be imaged by means of acoustic logging.

The invention discloses a super-structured material-based surface-enhanced infrared substrate and a molecule detection method thereof. The infrared substrate is sequentially provided with a support substrate, a uniform surface plasmon film, and a periodic array. By regulating the period of the periodic array, the uniform surface plasmon film of the infrared substrate and an electric dipole mode are coupled to each other, so that the resonance wavelength of the latter changes, and the near-field electric field strength increases. When a molecule to be measured is absorbed or prepared on the infrared substrate, a surface-enhanced infrared absorption spectrum of the molecule to be measured can be tested through external infrared spectroscopic equipment. The uniform surface plasmon film is made of a metal material or a dielectric material whose real part of the dielectric constant is negative, and the thickness is greater than 200nm. The detection method comprise the following steps of (1)acquisition of an experimental test spectrum; (2) acquisition of a theoretical simulation spectrum; (3) construction of an evaluation function; (4) inversion solution; and (5) result analysis.

The invention discloses a graphene-based light operation-control system. The system comprises a target particle at a target position and a wave beam generating apparatus; the target particle is a core-shell structure, and comprises core-layer graphene and shell-layer graphene; and the wave beam generating apparatus is used for generating a first-order Bessel wave beam to illuminate the target particle, so that respective electric dipole modes of the core-layer graphene and the shell-layer graphene are coupled with respective electric quadrupole modes to form Fano resonances, a light pulling force directed to the wave beam generating apparatus is applied to the target particle, and the target particle is moved to the wave beam generating apparatus. By illumination of the first-order Besselwave beam, forward scattering can be promoted while backward scattering can be suppressed, so that a relatively large negative optical force is obtained, movement of the target particle by pulling thetarget particle along a direction of the wave beam generating apparatus is realized, a distance between the target particle and the wave beam generating apparatus is shortened, and thereby movement of the target particle is realized. The invention also provides a light operation-control method which has the above beneficial effects.

The invention discloses a compact 5G dual-band millimeter wave linear array antenna based on SIW feed, which is applied to 5G millimeter wave communication and comprises a multi-layer SIW power divider and a dipole slot combined dual-band antenna. In the power division network, a transverse seam is formed in a metal layer of the SIW and used for cutting surface current, so that electromagnetic wave energy conducted internally can be coupled to the upper layer through the seam. The basic structure of the power division network is similar to that of a T-shaped power divider, and the eight antenna units are fed in a three-stage cascade mode. A low-frequency dipole mode and high-frequency slot mode composite dual-frequency antenna is designed as an antenna unit by comprehensively considering loss and matching. Miniaturization and compactness of the linear array antenna structure are realized.