44 results about "Aperture coupling" patented technology

A dual-polarized microstrip patch antenna structure comprising: a dual microstrip feed line circuitry underneath a bottom dielectric substrate; a ground plane layer overlying the bottom dielectric substrate, the ground plane layer having coupling apertures etched to the ground plane layer; a middle metallized patch layer stacked over a middle dielectric substrate; a top metallized patch layer stacked underneath a top dielectric substrate; and an air layer between the middle dielectric substrate and the top dielectric substrate separating the middle metallized patch layer and the top metallized patch layer. The microstrip feed line circuitry is configured to utilize corner-feeding techniques for enabling diagonal modes of the patch layers, and the coupling apertures of the ground plane layer are provided with a non-resonant bow-tie shape for enabling aperture coupling between the microstrip feed line circuitry and the patch layers.

A miniaturized, low power RF transmitter with a dual mode active on-chip antenna/inductor is disclosed in which antenna also serves as the oscillator inductor. Also disclosed is a miniaturized low power RF receiver with an on-chip antenna; and a RF transmitter system wherein an on-chip antenna is wirelessly coupled to an off chip patch antenna are disclosed. Advantageously, the TX chip is housed in a low loss, e.g. Low Temperature Co-fired Ceramic (LTCC) package with a patch antenna to provide a System-on-Package implementation comprising electromagnetic coupling between a RF TX chip comprising an integrated on-chip antenna and a package antenna. The on-chip antenna feeds the LTCC patch antenna through aperture coupling, thus negating the need for RF buffer amplifiers, matching elements, baluns, bond wires and package transmission lines, and significantly increases the gain and range of the module with respect to the on-chip antenna alone, without deterioration of the circuit performance and power consumption. Exemplary embodiments are disclosed which may be fabricated using standard CMOS technology, for operation in the 5 GHz U-NII band for applications such as miniaturized, low cost, low power wireless devices and sensor systems.

Provided is a radio frequency identification (RFID) sensor tag antenna using an aperture coupling feeding method, including: a radiation patch for determining a resonance frequency of the RFID sensor tag antenna, which is disposed in an uppermost portion of the RFID sensor tag antenna; a first dielectric layer disposed on a bottom surface of the radiation patch and interposed between the radiation patch and a ground layer disposed to be parallel with the radiation patch; and a slot formed in a side of the ground layer and coupling RF signals to the RFID sensor tag antenna. Thus, the RFID sensor tag antenna can separately adjust resistance and reactance components of input impedance. As a result, the RFID sensor tag antenna can be matched with an RFID sensor tag board without an additional matching circuit.

A microwave antenna apparatus comprises a semiconductor element and an antenna element embedded into a mold layer, which is covered by a redistribution layer. The antenna element is preferably configured as SMD component so that it can be handled by a standard pick and place process. The coupling between semiconductor element and antenna element is provided either by a metal layer or aperture coupling within the redistribution layer. The microwave antenna apparatus may be coupled to a PCB arrangement thus forming an embedded wafer-level ball grid array (eWLB) or embedded micro-wafer-level-packaging (emWLP) package.

The invention discloses a surface-enhanced Raman scattering substrate based on a surface plasmon polariton local-field coupling effect and a preparation method of the surface-enhanced Raman scattering substrate, and relates to a molecular detection and recognition technique and a preparation method of a metal micro/nano structure. The surface-enhanced Raman scattering substrate consists of the metal micro/nano structure with nano-scale gaps. The surface plasmon polariton local-field coupling effect exists in the gaps. The specific types of the surface-enhanced Raman scattering substrate comprises an Ag nano particle and Ag membrane coupling system, an Ag nano particle and Ag nano aperture array coupling system, and an Ag nano sphere cap and Ag nano aperture coupling system. The preparation method comprises a wet chemical method and a vacuum thermal evaporation deposition method. The preparation method of the surface-enhanced Raman scattering substrate is safe, simple and convenient, complex equipment is not required, the cost is low, the structure is stable and controllable, the repeatability is high and high enhanced factors can be provided at the same time.

This invention relates to a microstrip array antenna, especially a broad-band dual-polarized microstrip array antenna having parallel feeding structure whose consist of two parts power supplying layers each of which generates its own polarization respectively. And the broad-band dual-polarized microstrip array antenna according to the present invention arranges transmission paths for two separate linear polarization on a different layer each other in order to minimize an interference effect and a proximity feeding method and an aperture coupled method are used in order to get two separate polarization.

The invention provides an LTCC aperture coupling array antenna, belongs to the technical field of antennas and aims at overcoming the defects of an existing micro-strip array antenna in the aspect of giving consideration to miniaturization, broadband and high gain. The LTCC aperture coupling array antenna comprises upper and lower layer radiation metal patch units, upper, middle and lower layer dielectric substrates, a grounded metal layer, resonance apertures and a micro-strip feed network, wherein the upper layer radiation metal patch units are arranged in triangular lattices, and the lower radiation metal patch units are arranged in rectangular lattices. Compared with regular micro-strip patch array antennas based on organic media or ceramic substrates, the LTCC aperture coupling array antenna is capable of obtaining a larger antenna bandwidth under the same size limit and giving better consideration to the performance requirements of miniaturization, broadband and high gain of the patch antenna.

The invention discloses a broadband micro-strip antenna array coupling structure, and aims to provide a micro-strip patch antenna array, which is simple in structure, is conveniently and quickly debugged and can effectively reduce side-lobe levels of antennae. According to the technical scheme, a micro-strip patch antenna array body consists of a plurality of antenna radiation units longitudinally arranged on a dielectric support, wherein a coupling groove is formed below a radiation patch of each antenna radiation unit; the length of the coupling groove of each antenna radiation unit is progressively decreased from middle to two ends, so that a gradually variable coupling groove length aperture coupling form is achieved; the antenna radiation units with the coupling grooves which are equal in length are arranged in pairs on the array body; the lengths of the coupling grooves which are symmetrically formed in pairs from left to right are equal; the patch of each antenna radiation unit feeds through a unit feeder perpendicularly passing through the corresponding coupling groove. According to the broadband micro-strip antenna array coupling structure, the lengths of the coupling grooves are progressively decreased from middle to two ends, so that excitation current for the coupling of the feeders to the patches is changed, and the side-lobe levels of the antennae are reduced.

The present invention discloses an aperture coupled feeding broadband patch antenna with dual-polarization performance. The aperture coupled feeding broadband patch antenna comprises a radiation layer, an aperture coupling layer and a feeding layer; the radiation layer is fitted on the aperture coupling layer; the feeding layer is fitted beneath the aperture coupling layer; the upper surface of the radiation layer is provided with a circular radiation patch for widening antenna bandwidth; the upper surface of the aperture coupling layer is provided with an annular coupling patch; a copper-plated metal surface is laid on the upper surface of the feeding layer; a first feeding slot, a second feeding slot and an isolation slot are formed in the copper-plated metal surface through etching; and the lower surface of the feeding layer is provided with a first feeder line and a second feeder line which are perpendicular to each other, the joint of the length edges of the first feeder line and the second feeder line is provided with a first port, the joint of the width edges of the first feeder line and the second feeder line is provided with a second port, and therefore, the dual-polarization performance of the antenna can be realized. According to the antenna of the invention, the isolation slot of which the tilt angel is 45 degrees is formed in the copper-plated metal surface of the feeding layer, and therefore, the isolation degree of the antenna is improved.

An aperture coupled microstrip-to-waveguide transition (“ACMWT”) is disclosed that includes a plurality of dielectric layers forming a dielectric structure and an inner conductor formed within the dielectric structure. The plurality of dielectric layers includes a top dielectric layer that has a top surface. The (“ACMWT”) further includes a patch antenna element (“PAE”) formed on the top surface, a bottom conductor, an antenna slot within the PAE, a coupling element (“CE”) formed above the inner conductor and below the PAE, and a waveguide. The waveguide includes at least one waveguide wall and a waveguide backend, where the waveguide backend has a waveguide backend surface that's a portion of the top surface of the top dielectric layer and where the waveguide backend surface and the at least one waveguide wall form a waveguide cavity within the waveguide. The PAE is a conductor located within the waveguide cavity at the waveguide backend surface.

The invention discloses a low-profile broadband wide-angle tight coupling antenna unit and array, and belongs to the technical field of radar and communication. The antenna unit comprises a wide-anglematching layer, a coupling layer, an antenna layer and a feed layer, wherein the whole structure is processed by adopting a multi-layer printed board process. The antenna array is formed by arrangingantenna units according to a specified unit spacing rule. According to the antenna unit, a multi-layer printed board processing technology is adopted, so that the assembling and welding difficulty ofthe tightly coupled antenna array in the later period is greatly reduced, and the reliability of the antenna array is also improved; and the antenna array adopts a microstrip line aperture coupling feed structure, so that the design of a broadband balun of a traditional dipole tight coupling array antenna is omitted, and the design difficulty of the tight coupling array antenna is greatly simplified.

An microstrip antenna is provided. A microstrip antenna includes a first substrate with a first surface and a second surface paralleled to each other, a metal ground plane with an aperture deposed on the first surface and exposed parts of the first substrate via the aperture and a metal feed line deposed on the second surface, the metal feed line has at least two intersections with the aperture on a horizontal projection plane, in order to feed a signal received or transmitted by the microstrip antenna.

An antenna structure (200) includes a counterpoise ground plane (202) with a pair of opposing inverted-F elements (204, 206). Each of the F elements has a closed end (208, 210) that is impedance-coupled to the ground plane. A conductive cross member (216) coupled the closed ends together, and a feed point (218) is located on the cross member.

The invention discloses a plasma filter with an embedded rectangular cavity based on an MIM waveguide. The plasma filter belongs to the field of micro-nano optoelectronics. The filter of a metal-dielectric-metal rectangular waveguide is constructed by adopting an aperture coupling method. According to the plasma filter, a metal thin film is made of a metal silver material, the overall prepared metal thin film is square, and an incident waveguide, a rectangular aperture and a rectangular resonant cavity are formed in the metal thin film in a hollowed manner. The plasma filter adopts the rectangular resonant cavity to realize resonance coupling of surface plasmon polaritons SPP and the resonant cavity through connection of the rectangular aperture and the optical waveguide. The plasma filterhas the advantage of being capable of realizing frequency selection property of the filter through adjusting the length and width of the rectangular resonant cavity, the width of the rectangular aperture and the like.

A photon concentrator includes an imaging photon concentrator concentrating photons from a source to an image point and a non-imaging photon concentrator. The non-imaging photon concentrator (NIPC) has an entry aperture coupling to the imaging photon concentrator near the image point. The NIPC also includes an exit aperture wherein the entry aperture is larger than the exit aperture.

The invention relates to an antenna with high isolation and low cross polarization level, a base station and a terminal. The antenna comprises at least one radiation layer, a feed layer and an aperture coupling layer arranged between the radiation layer and the feed layer, and the aperture coupling layer comprises a metal sheet. The metal sheet is provided with a first feed gap, a second feed gap and a middle gap, and the middle gap is located between the first feed gap and the second feed gap and located in a weak electric field area of the metal sheet. By arranging the middle gap between the first feed gap and the second feed gap of the metal sheet, the boundary condition of the antenna can be changed under the condition that the radiation electric field of the antenna is not changed due to the existence of the middle gap, so that on one hand, the current in the cross polarization direction generated on the antenna is weakened, and the cross polarization level is reduced; and on the other hand, the energy coupling phenomenon of the antenna is effectively weakened, so that the isolation of the antenna is remarkably improved.

An apparatus for generating high frequency electromagnetic radiation includes a whispering gallery mode resonator, coupled to an output waveguide through a coupling aperture. The resonator has a guiding surface, and supports a whispering gallery electromagnetic eigenmode. An electron source is configured to generate a velocity vector-modulated electron beam, where each electron in the velocity vector-modulated electron beam travels substantially perpendicular to the guiding surface, while interacting with the whispering gallery electromagnetic eigenmode in the whispering gallery mode resonator, generating high frequency electromagnetic radiation in the output waveguide.

The invention discloses a stepped aperture coupling broadband antenna with a double-layer non-uniform metasurface structure. The antenna comprises a dielectric plate a and a dielectric plate b which are arranged in parallel along the horizontal direction, and an air cavity is formed between the dielectric plate a and the dielectric plate b; rectangular radiation patches a without four corners areuniformly placed on the top surface of the dielectric plate a; rectangular radiation patches b without four corners are uniformly placed on the top surface of the dielectric plate b; the bottom surface of the dielectric plate b is provided with a coplanar waveguide and a stepped coupling aperture, and the coplanar waveguide is coupled in the stepped coupling aperture. According to the invention, the characteristics of low gain and narrow band of the microstrip antenna are improved, and the characteristics of miniaturization, high gain and broadband of the antenna are realized.

An aperture array comprises apertures arranged over one or more dimensions. Each aperture is configured to receive a respective portion of a received optical wavefront. Each aperture is coupled to a respective optical mixer that coherently interferes the respective portion of the received optical wavefront with a respective local oscillator optical wave. A processing module is configured to process electrical signals detected from outputs of the optical mixers, including: for each optical mixer, determining at least one phase/amplitude information from at least one electrical signal detected from at least one output of that optical mixer, determining direction-based information, associated with a subset of the field of view, based on phase/amplitude information derived from at least two optical mixers of the plurality of optical mixers, and determining distance information from the direction-based information.

The invention relates to a device for coupling spatial light with an optical fiber. The device comprises a recessed samarium cobalt magnet. The samarium cobalt magnet is provided with a mounting trough. The bottom of the mounting trough is provided with a glue guiding trough. The mounting trough is internally provided with a single-order isolator. A coupling lens is arranged above the single-order isolator. The single-order isolator is a hexahedron. The side surface of the single-order isolator contacts with two inner walls of the mounting trough. The coupling lens comprises a spherical surface and a flat surface. An included angle between the top surface of the single-order isolator flat surface and an included angle between the bottom surface of the single-order isolator and the flat surface are 6-8 DEG. The spherical surface is next to the side of the single-order isolator. The single-order isolator does not contact with the top point of the spherical surface of the coupling lens. The physical aperture of the coupling lens at the spherical surface side is smaller than the optical aperture of the single-order isolator. The lens center of the coupling lens is coaxial with the optical center of the single-order isolator. The device provided by the invention has advantages of small size, effective process simplification and effective random error reduction. An optical isolating function and a coupling function are integrated in the device with total thickness which does not exceed 1.4mm, thereby satisfying requirements of maximal coupling efficiency and smallest size.