摘要:
A radio receiving apparatus has a receiving section for receiving a radio signal, a local oscillating section for generating a first local oscillation signal and a second local oscillation signal, wherein the first local oscillation signal and the second local oscillation signal have each of a first frequency and a second frequency differing from a received frequency. The apparatus also has a frequency converting section for mixing the received signal output from the receiving section and the first local oscillation signal to output an intermediate frequency signal and an orthogonal converting section for orthogonal converting the intermediate frequency signal output with the second local oscillation signal.
摘要:
An antenna apparatus is disclosed which comprises: a printed circuit board; a first loop antenna, arranged along one side of the printed circuit board, wound more than one turn; a second loop antenna, arranged along the side, wound less than one turn, one end of the first loop antenna and one end of the second loop antenna being fixed to a first area on the printed circuit board near the side; and a capacitor, fixed to a second area of the printed circuit board remote from the first area near the side, having one end connected to another end of the first loop antenna and another end connected to another end of the second loop antenna. In the antenna apparatus, the first and second loop antennas may comprise conductive rods. In the antenna apparatus, the first and second loop antennas may comprise stripe conductive plates. In the antenna apparatus, the first area and second area are remote with a distance from 5 mm to 15 mm, or a distance more than 15 mm to 30 mm, favorably, or a distance more than 30, most favorably.
摘要:
A charge controller for a toner, containing a polymer of an ethylenically unsaturated monomer, where the polymer has a dielectric loss tangent (tan .delta.) at 100 kHz of 0.008 to 0.3 and a water absorbency of at most 10% by weight, and selected from the group consisting of: (1) a polymer (A1) having units resulting from a monomer (1) having an aromatic ring substituted with at least one electron-attracting group (X) selected from the group consisting of halogen, a nitro group and a cyano group; and (2) a copolymer (A2) of a monomer (2) having an organic acid group or salt thereof, with one or more copolymerizable monomers, a toner binder and toner containing the same are provided which give excellent properties with respect to electrostatic charge amount, charging rate and environmental stability, as well as providing an essentially colorless charge controller containing no metal and improved dispersing properties and transparency.
摘要:
Polymers, comprising block-wise or/and graft-wise linked (A) a polymer having amino group-containing monomer units and (B) at least one polymer such as styrenic polymers, olefinic polymers, polyesters, epoxy resins and polyurethanes, are useful as charge controllers for electrophotographic toners.
摘要:
A thermoplastic elastomer composition that exhibits excellent rubber elasticity, etc. is obtained by dynamically heating a polymer composition in the presence of the crosslinking agent, the polymer composition including an α-olefin thermoplastic resin (A), and an oil-extended ethylene copolymer (B) that includes an ethylene copolymer that satisfies given conditions, and 50 to 150 parts by mass of a first mineral oil-based softener based on 100 parts by mass of the ethylene copolymer, the content of the oil-extended ethylene copolymer (B) being 30 mass % or more based on the total amount (=100 mass %) of the polymer component including the α-olefin thermoplastic resin (A) and the oil-extended ethylene copolymer (B).
摘要:
A ZrO2—Al2O3 composite ceramic material having excellent wear resistance, hardness, strength and toughness is provided. This ceramic material comprises a ZrO2 phase composed of 90 vol % or more of tetragonal ZrO2, and containing 10 to 12 mol % of CeO2 as a stabilizer, and an Al2O3 phase. An amount of the Al2O3 phase in the ceramic material is in a range of 20 to 70 vol %, and preferably 40 to 70 vol %. In the composite ceramic material, Al2O3 grains each having a fine ZrO2 grain therein are dispersed. Some of the Al2O3 grains each having the fine ZrO2 grain therein are trapped within ZrO2 grains to form composite grains. A ratio of the number of the Al2O3 grains each having the fine ZrO2 grain therein relative to the number of the entire Al2O3 grains dispersed in the composite ceramic material is 10% or more, and preferably 50% or more.
摘要翻译:提供了具有优异的耐磨性,硬度,强度和韧性的ZrO 2 -Al 2 O 3复合陶瓷材料。 该陶瓷材料包括由90质量%以上的四方晶ZrO 2构成的含有10〜12摩尔%的作为稳定剂的CeO 2和Al 2 O 3相的ZrO 2相。 陶瓷材料中的Al 2 O 3相的量为20〜70体积%,优选为40〜70体积%。 在复合陶瓷材料中,分散有ZrO 2颗粒微小的Al 2 O 3粒子。 一些具有细ZrO 2颗粒的Al 2 O 3颗粒被捕获在ZrO 2晶粒内以形成复合晶粒。 每个具有细ZrO 2颗粒的Al 2 O 3颗粒的数量相对于分散在复合陶瓷材料中的整个Al 2 O 3颗粒的数量的比例为10%以上,优选为50%以上。
摘要:
A slidable-type portable terminal has a first enclosure; a second enclosure; a first board arranged in the first enclosure; a second board arranged in the second enclosure; an antenna electrically connected to the first board; a connecting unit that electrically connects together the first board and the second board; a plurality of sliding units that slidably connects the first enclosure to the second enclosure; and a conductor for electrically connecting the connecting unit to one of the plurality of sliding units. The one of the plurality of sliding units is electrically connected to a ground of the connecting unit by means of the conductor.
摘要:
A wireless communication device is equipped with a first housing having a first circuit board; a second housing that is provided at one end of the first housing so as to freely open and close with respect to the first housing and that has a second circuit board and an audio input section; and a third housing that is provided at the other end of the first housing so as to be reclosably open with respect to the first housing and that has a third circuit board and an audio output section. A portion of the second housing overlaps a portion of the first housing while the second housing remains open with respect to the first housing. The first housing has a first conductive terminal disposed at a position on the first circuit board that overlaps a portion of the second housing while the second housing remains open with respect to the first housing. The second housing has a second conductive terminal, which is electrically connected to the first conductive terminal while the second housing remain open, at a position on the second circuit board that overlaps a portion of the first housing while the second housing remains open with respect to the first housing. The first circuit board has a power feeding section. The first circuit board and the second circuit board makeup a dipole antenna when the second housing is opened with respect to the first housing.
摘要:
A method for producing an α,β-unsaturated carboxylic acid ester is provided in which an alcohol (A) is caused to react with an α,β-unsaturated carboxylic acid or a lower alkyl ester (B) of the α,β-unsaturated carboxylic acid in the presence of a sulfonic acid group-carrying inorganic porous material (α), and an α,β-unsaturated carboxylic acid ester obtained by the above-described method is provided that contains not more than 50 ppm of sulfur atoms based on a weight of the α,β-unsaturated carboxylic acid ester, not more than 2 mol % of by-product etherification products and not more than 1 mol % of by-product addition products based on the mole number of the α,β-unsaturated carboxylic acid ester. Such methods are a method for producing an α,β-unsaturated carboxylic acid ester that does not involve generation of a large amount of waste products and a method for producing a high-purity α,β-unsaturated carboxylic acid ester that causes only a smaller amount of by-products to be generated, and a high-purity α,β-unsaturated carboxylic acid ester is provided that contains only a smaller amount of catalyst residues and exhibits less metal corrosion behavior.
摘要:
Provides is a compound semiconductor substrate about which the thickness of its nitride semiconductor single crystal layer can be made large while the generation of cracks, crystal defects or the like is restrained in the nitride semiconductor single crystal layer. The substrate has a first intermediate layer 110 formed on a Si single crystal substrate 100 having a crystal plane orientation of {111}. In the layer 110, a first metal compound layer 110a made of any one of TiC, TiN, VC and VN, and a second metal compound layer 110b made of any one of compounds which are different from the compound of the first metal compound layer out of TiC, TiN, VC and VN are laminated in this order alternately each other over the Si single crystal.