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264results about How to "Less deformation" patented technology

Phased array antenna

There is provided a phased array antenna having variable phase shifters constituted by using a variable dielectric-constant dielectric substance whose dielectric constant varies according to an applied electric field, which antenna can dispense with a DC blocking element that causes mismatch, and reduce deformation of the beam shape even when beam tilt occurs, in the case where the variable phase shifters are divided into those for right-side tilt and those for left-side tilt and the phase shift amounts thereof are independently controlled.The phased array antenna is provided with a feeding phase shift unit (130) having a laminated structure obtained by laminating at least a ground conductor layer (117), an insulator layer (118), a main conductor layer (119), a variable dielectric-constant dielectric layer (120), and a sub conductor layer (121) in this order, and a propagation characteristic variable line (105) having a line on the sub conductor layer in an area which planarly overlaps a line on the main conductor layer is provided on the feeding phase shift unit. By applying a bias voltage between the main conductor layer and the sub conductor layer, the dielectric constant of the variable dielectric-constant dielectric substance in the propagation characteristic variable line area is varied to control the propagation characteristics. Thereby, a DC blocking element to be inserted in series into the feeding line can be dispensed with.
Owner:PANASONIC CORP

Fiber-reinforced composite hollow structure, method for production thereof, and apparatus therefor

Center cores are formed by extrusion-molding ABS resin. Seven pieces of the center cores, which are juxtaposed to each other in the horizontal direction, are supplied by a pultruder, and reinforcing long-fibers impregnated with an unsaturated polyester resin are allowed to pass through dispersion guides and squeezing nozzles, to thus squeezing-mold a fiber-reinforced composite hollow structure having FRP made legs. A final squeezing nozzle is disposed in a cross head die through a cooling jacket, and the hollow structure thus molded is allowed to pass therethrough to be covered with the ABS resin in a state in which the outer periphery of the hollow structure is heated. The hollow structure thus covered is subjected to cooled-sizing through a plurality of horizontal and vertical pairs of rollers, and then cured in a hot curing tank. The surface covered with the ABS resin is subjected to a surface-treatment of imparting irregularities for giving an antislipping function to the surface. A thermoplastic resin-made protective cap is fitted to an end of the center core. The apparatus for manufacturing a composite hollow structure has a plurality of pairs of rotatable and heat-resisting sizing rollers. The plurality of pairs of the sizing rollers are disposed in the pultruding direction while being gradually cooled in the order from those positioned on the upstream side to those positioned on the downstream side for sizing the softened outer layer covering the outer periphery of the intermediate layer.
Owner:UBE NITTO KASEI CO LTD
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