79 results about "Artificial dielectrics" patented technology

A useful energy product created by a process where a chemical species flow passes through a macroscopic artificial dielectric structure for a gas-permeable susceptor having (a) first regions in the structure that are primarily transparent to applied electromagnetic energy and (b) second regions in the structure that are not primarily transparent to applied electromagnetic energy.

A method of locally concentrating an applied electric field to promote chemical reaction having a dispersion of individual field concentrators on the surface of a substrate, embedded on a substrate, and embedded on the surface of a substrate, in which the individual field concentrators consists of shaped material and the shape and material are capable of producing a locally concentrated electric field in the vicinity of the field concentrator from interaction between the field concentrator and the applied electric field.

Apparatuses and systems for emulating electrical characteristics of a material having a known dielectric constant are disclosed for standardizing and calibrating of electromagnetic devices. The emulator apparatus can include an electrically non-conductive layer having a dielectric constant less than the material dielectric constant and an electrically conductive layer adjacent the non-conductive layer. Artificial dielectrics for emulating the dielectric constant of a material are also disclosed including a substrate matrix having a dielectric constant less than the material dielectric constant and an additive combined with the substrate, the additive having a dielectric constant higher than the material dielectric constant.

Graded artificial dielectrics using nanostructures, such as nanowires, are disclosed. The graded artificial dielectric includes a material (typically a dielectric) with a plurality of nanostructures, such as nanowires, embedded within the dielectric material. One or more characteristics of the nanostructures are spatially varied from a first region within the dielectric to a second region within the dielectric to produce permittivity of the graded artificial dielectric that is spatially varied. The characteristics that can be varied include, but are not limited to, nanostructure density, nanostructure length, nanostructure aspect ratio, nanostructure oxide ratio, and nanostructure alignment. Methods of producing graded artificial dielectrics are also provided. A wide range of electronic devices such as antennas can use graded artificial dielectrics with nanostructures to improve performance.

The invention provides an artificial dielectric cylindrical lens-based multi-beam antenna of covering a high building. The artificial dielectric cylindrical lens-based multi-beam antenna is formed byhighly integrating a plurality of antenna elements through an artificial dielectric cylindrical lens as a carrier. The artificial dielectric cylindrical lens-based multi-beam antenna comprises a cylindrical lens 1, antenna element groups 2 and a metal bottom plate 3, wherein the cylindrical lens 1 is made of an artificial dielectric material; the multi-beam antenna comprises two same antenna element groups 2; each antenna element group 2 comprises a plurality of antenna elements; the antenna elements are individuals and are fixed on the metal bottom plate 3 to form a whole body; and the two antenna element groups 2 are distributed at the same side of the cylindrical lens 1 and are uniformly arranged into upper and lower lines along the semi-circumference of the cylindrical lens 1. The pitch plane diagram of the antenna has double beams which turn up and incline downwards separately, so that a complicated electric tuning mechanism can be omitted, the problem that the high building cannot receive a mobile signal is solved, and the artificial dielectric cylindrical lens-based multi-beam antenna is especially suitable for intensive user and large data traffic business areas.

The invention discloses a sectored multi-beam antenna based on an artificial dielectric cylindrical lens. The sectored multi-beam antenna is formed by highly integrating a plurality of antenna units by taking the artificial dielectric cylindrical lens as a carrier. The sectored multi-beam antenna comprises the artificial dielectric cylindrical lens 1, an antenna unit group 2 and metal base plates3, wherein the antenna unit group 2 comprises the plurality of antenna units, each antenna unit is an independent unit and is fixed on one metal base plate 3 to form a whole, and the antenna units areevenly arranged in a row along the semi-circumferential surface of the cylindrical lens at equal heights. The sectored multi-beam antenna can achieve 180-degree full coverage in the horizontal plane,a vertical plane actual measurement directional diagram of each beam is 2-3 times wider than that of the conventional electrically-tuning antenna, and the field strength in a covered region is dominant, thus an electrically-tuning mechanism is not needed. The sectored multi-beam antenna based on the artificial dielectric cylindrical lens can effectively avoid the phenomenon ''that a signal dead end occurs in the surrounding area below a tower'' which is prone to occur in traditional antennas, is especially suitable for dense user and large data traffic service areas, can improve the capacityexponentially by means of multiple beams, and can adapt to the requirement of current and future information transmission outbreaks.

A new antenna includes a rectangular slot element provided on a conducting plate and covered by a special substrate portion. The substrate portion includes stacked layers of capacitively-loaded conducting ring elements, arranged in the form of an (e.g., periodic) array in each layer. The slot antenna element is excited by a parallel-plate waveguide, which is fabricated below the conducting plate on which the slot antenna is made. The antenna design, when used in the form of a single antenna element, would produce ideally uniform power radiation over all directions in the upper hemi-spherical space. A large periodic array of such ideally isotropic antenna elements permits electronic beam scanning and has a performance of power coupling from signal sources at the antenna inputs which is independent of the azimuth (Φ) scanning direction, dependent only on one spatial variable (elevation angle, θ) of scanning. Such performance from an antenna array normally can not be achieved using conventional designs. Such an antenna array may be used in communications and radars.

A volume hologram for modifying a characteristic of an input microwave beam and a method for manufacturing thereof are disclosed. The hologram is fabricated from a multi-layer artificial dielectric wherein each layer is made of a dielectric material and includes a lattice of inclusions, for example metal disks disposed on one side thereof, and wherein a pre-determined three-dimensional grating pattern of dielectric perturbations is induced by spatial modulating the lattice of the inclusions. The hologram can be designed for efficiently steering, reshaping, combining or splitting microwave beams.