摘要:
Provided are a conductive structure for a high gain antenna and an antenna. A plurality of conductive patterns (512) of the conductive structure are formed on top and bottom surfaces of a dielectric substrate (511) positioned above the antenna and separated from an antenna body (500). A conductive upper structure of the antenna (510) is positioned above the antenna opposite to a ground plane (530) to which the antenna body is fed, separated from the antenna body. A conductive unit structure comprising a plurality of conductive patterns (512) formed on top and bottom surfaces of the dielectric substrate (511) is arranged in a plurality of layers. The conductive structure for a high gain antenna and the antenna can be readily produced by using low cost printed circuit board (PCB) technology, and a gain of the antenna can be increased regardless of a resonance distance between the ground plane of the antenna and the conductive structure disposed above the antenna.
摘要:
Provided is an unlimited single-layer metamaterial structure having negative permittivity and negative permeability in a frequency bandwidth desired by a user. The metamaterial structure includes: a dielectric having a single layer structure having a permittivity or a multi-layer structure in which at least one layer has a different permittivity; and a single conductor disposed in the dielectric, wherein the metamaterial structure has a permittivity, a permeability, and a refractivity that have 0 or a negative value in a predetermined frequency band.
摘要:
Provided is a planar meta-material (100) having negative permittivity, negative permeability, and a negative refractive index through a simple structure using a general conductor and a dielectric material (130), a planar meta-material structure including a planar meta-material (100), and a lens realized by using the planar meta-material structure or an antenna system, which has high efficiency and high gain, by including the planar meta-material structure. The planar meta-material includes: a planar dielectric material (130) having a single layer structure with single permittivity or a multilayer structure having at least two permittivities; a first conductor unit (110), which is disposed on a top surface of the planar dielectric material and includes a first conductor (110a, 110b) having a loop shape; and a second conductor unit (120), which is disposed on bottom surface of the planar dielectric material and includes a second conductor (120a, 120b) having the same shape as the first conductor, wherein permittivity, permeability, and a refractive index of the planar meta-material have zero or a negative value in a predetermined frequency domain.
摘要:
Provided are a tag antenna for wireless identification and a wireless identification system including the tag antenna. The tag antenna includes: a substrate formed of a first dielectric; a conductive ground layer formed underneath the substrate; an AMC layer formed on the substrate; and a wireless identification chip adhered onto the AMC layer.
摘要:
Provided are a tag antenna for wireless identification and a wireless identification system including the tag antenna. The tag antenna includes: a substrate formed of a first dielectric; a conductive ground layer formed underneath the substrate; an AMC layer formed on the substrate; and a wireless identification chip adhered onto the AMC layer.
摘要:
Double-stranded and single-stranded RNA molecules, and their use in methods for inducing interferon are provided. The interferon induction provides anti-viral and other medically useful effects, such as anti-cancer effects. Also provided are methods for reducing or inhibiting interferon induction exhibited by such molecules, particularly siRNA and shRNA molecules produced in vitro.
摘要:
The present application describes a method of making concatenated RNA comprising, mixing a single stranded DNA template with a RNA transcription reagent and allowing transcription reaction to occur, and use of the RNA for anti-viral and anti-cancer purposes.
摘要:
The invention is directed to compositions and methods for selectively reducing the expression of a gene product from a desired target gene in a cell, as well as for treating diseases caused by the expression of the gene. More particularly, the invention is directed to compositions that contain double stranded RNA (“dsRNA”), and methods for preparing them, that are capable of reducing the expression of target genes in eukaryotic cells. The dsRNA has a first oligonucleotide sequence that is between 25 and about 30 nucleotides in length and a second oligonucleotide sequence that anneals to the first sequence under biological conditions. In addition, a region of one of the sequences of the dsRNA having a sequence length of at least 19 nucleotides is sufficiently complementary to a nucleotide sequence of the RNA produced from the target gene to trigger the destruction of the target RNA by the RNAi machinery.
摘要:
A gravity power and desalination technology system is provided, including a heat storage apparatus, an inner tube portion, a hot-air and vapor generator, and venting holes, a corrugated tube portion, an outer tube portion, an updraft wind power generator, and an artificial hydro power generator. The heat storage apparatus is provided in a lower portion and configured. The inner tube portion has an inner vent portion inside and disposed vertically over the heat storage apparatus. The hot-air and vapor generator is disposed between the heat storage apparatus and the inner tube portion. The venting holes are bored through the inner tube portion obliquely outwards. The corrugated tube portion is provided on a top portion of the outer tube portion. The updraft wind power generator and the artificial hydro power generator are installed in the lower portions of the inner vent portion and the outer vent portion, respectively.
摘要:
The invention is directed to compositions and methods for selectively reducing the expression of a gene product from a desired target gene in a cell, as well as for treating diseases caused by the expression of the gene. More particularly, the invention is directed to compositions that contain double stranded RNA (“dsRNA”), and methods for preparing them, that are capable of reducing the expression of target genes in eukaryotic cells. The dsRNA has a first oligonucleotide sequence that is between 25 and about 30 nucleotides in length and a second oligonucleotide sequence that anneals to the first sequence under biological conditions. In addition, a region of one of the sequences of the dsRNA having a sequence length of at least 19 nucleotides is sufficiently complementary to a nucleotide sequence of the RNA produced from the target gene to trigger the destruction of the target RNA by the RNAi machinery.