摘要:
A slot array antenna is provided, which has a high gain and a high efficiency, is controllable of side lobes, and is adaptable to various polarized waves. The slot array antenna includes a radiation waveguide 30 having a first conductor plane in which a slot array is two-dimensionally arrayed and a second conductor plane in parallel thereto, and an introduction waveguide 20 formed with a slot array, for introducing electromagnetic waves in a waveguide space of the radiation waveguide. Each slot of the slot array of the introduction waveguide 20 is provided at an ½ wavelength or odd-number multiple of ½ wavelength of a wavelength inside the waveguide with respect to a direction of propagating the electromagnetic waves in the introduction waveguide 20, and the slots are tilted in the same direction, and thereby exciting electromagnetic waves in a high-order mode of a TE-mode in the radiation waveguide 30. Slots 31L and 31R are formed in the radiation waveguide 30 such that they cut off a guide-wall current occurred due to the high-order mode, and a primary direction of the radiated electric field is oriented, for example, to the direction of propagating the electromagnetic waves in the radiation waveguide 30.
摘要:
It is an object of the invention to provide an antenna with small side-lobe while narrowing the beam width to a desired one without the antenna increased in weight. Besides, it is also an object of the invention to decrease the manufacturing process less than ever before and reduce the cost. Furthermore, it is also an object of the invention to improve stability when the antenna is turned.In order to solve the above-mentioned problems, the antenna of the invention is characterized by comprising a radiator which is configured to radiate electromagnetic wave inside of an antenna housing, at least one dielectric which is configured to be contributory to directivity angle of the electromagnetic wave in the vertical direction, and characterized in that the dielectric is attached to the antenna housing ahead of the radiator.
摘要:
A process for producing a periodic structure comprises the steps of preparing a working object, the property of which changes in view of a photoreaction caused by an exciting energy, generating a light having a photonic energy of intensity of one fraction of natural number divisions of the exciting energy by each of the light sources of light-source groups arranged regularly in a two-dimensional arrangement, and concentrating the light emitted from the light source group at each of the light-concentrating points arranged at regular intervals in the working object to cause a photoreaction at and around the light-concentrating point to form a periodic structure comprised of regions each of which has a changed property in the working object.
摘要:
A method and an apparatus for easily making a continuous oriented structure of a polymer are provided. In making a polymer assembly, single crystals are bonded to each other, an external force, such as an electrical field or a magnetic field, is applied to the single crystals, or a solution of the polymer is applied on a substrate such that the applied solution is linear in shape.
摘要:
A compound represented by formula (I) wherein the symbols in the formula are the same meanings as those in specification, salts thereof, solvates thereof, or prodrugs thereof binds to DP receptor and shows antagonistic activity for DP receptor. Thus, it is useful for prevention and/or treatment of diseases such as allergic disease (e.g., allergic rhinitis, allergic conjunctivitis, atopic dermatitis, bronchial asthma and food allergy), systemic mastocytosis, disorders accompanied by systemic mast cell activation, anaphylaxis shock, bronchoconstriction, urticaria, eczema, diseases accompanied by itch (e.g., atopic dermatitis and urticaria), diseases (e.g., cataract, retinal detachment, inflammation, infection and sleeping disorders) which is generated secondarily as a result of behavior accompanied by itch (e.g., scratching and beating), inflammation, chronic obstructive pulmonary diseases, ischemic reperfusion injury, cerebrovascular accident, chronic rheumatoid arthritis, pleurisy, ulcerative colitis, etc. Since it specifically binds to DP receptor and binds weakly to other prostaglandins receptors, they can be pharmaceuticals having little side effect.
摘要:
An exposure apparatus includes a light-emitting portion arranged so as to be opposite to a photosensitive member at a position for exposure. A part of the light-emitting portion is smaller in width than a wavelength of light from the light-emitting portion.
摘要:
In a self-servo writing method, servo data is re-recorded, and thereby, servo data having worsened recording quality is rewritten. According to the method, the servo data is recorded in an entire range on a disk medium, and thereafter, the servo write direction is switched to re-record the servo data in a range to an intermediate circumferential area on the disk medium. In this way, the servo data is re-recorded to correct servo data having worsened recording quality.
摘要:
Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.
摘要:
A perpendicular magnetic recording disk drive is discloses which performs a head positioning control operation effectively against a hard easy transition shift (HETS) phenomenon. In the disk drive, a CPU performs an offset correcting operation in positioning control mode after a seek operation, using an offset value set on the basis of the HETS phenomenon from a memory when data is recorded.
摘要:
An information recording and/or reproducing apparatus for recording and/or reproducing information to/from a recording medium in a scanning probe microscope comprises a circuit to reproduce recording bits formed on the recording medium on the basis of a physical amount such as tunnel current, interatomic force, electrostatic force, or magnetic force which occurs between the probe and the recording medium, a sensor to detect a state such as film thickness or film quality of the recording medium on the basis of the physical amount before the recording bits are reproduced, and a correcting circuit to correct reproducing conditions such as a magnitude of a voltage which is applied between the probe and the medium on the basis of the detected state of the medium.