摘要:
In an antenna that has high sensitivity to frequencies of narrow bands and over a wide band and that can be small-sized, and in a wireless module, wireless unit and wireless apparatus using this antenna, the antenna is comprised of a transmission line, and variable capacitance means connected to this transmission line, and the variable capacitance means controls the resonant frequency.
摘要:
A flat-plate antenna having thinner shape and excellent productivity, reducing labor for installation in an electrical apparatus or on a wall, and exhibiting desired antenna characteristics stably is provided. The flat-plate antenna comprising a conductive flat-plate, a slit portion formed through said conductive plat-plate with width proportional to frequency band width, a radiating element portion disposed one side of said slit portion, a ground portion disposed other side of said slit portion, and a power supply line having a first conductor connected to said radiating element and a second conductor connected to said ground portion.
摘要:
Hybridization between a sample nucleic acid and a probe nucleic acid with an assay having the probe nucleic acid bound on the surface of a carrier, in which a liquid is fed to the surface of the carrier and the state of the thus-fed liquid is detected. The liquid may, for example, be a hybridization liquid containing the ample nucleic acid, or it may be a washing liquid for flushing byproducts and/or reactants away from the carrier in preparation for detection of hybridization results. Because the state of the liquid is detected, accuracy of hybridization assays is improved, since it becomes possible to detect and avoid difficulties encountered during hybridization and wash processing, such as formation of bubbles and incomplete washing.
摘要:
An objective lens for use with an information storage disk comprises a three-group three-element lens system including a first group composed of a positive-meniscus lens having a convex side directed toward a light source, a second group composed of a negative-meniscus lens having a concave side directed toward the light source, and a third group composed of a positive-meniscus lens having a convex side directed toward the light source. The objective lens satisfies the following requirements:(1) 1.8F 25F(3) 1.2F
摘要:
An objective system for a video disc comprising four lenses grouped into four lens components. The first lens component is a positive meniscus lens, the second lens component is a positive meniscus lens, the third lens component is a positive meniscus lens having a relatively long focal length or a negative meniscus lens, and the fourth lens component is a positive meniscus lens. The objective system satisfies the following conditions:(1) 1.7F>F.sub.1,2 >1.4F(2) 1.35>F.sub.1 /F.sub.2 >0.75(3) 1.0>F.sub.1,2 /F.sub.1,2,3 >0.8(4) 1.1F>d.sub.5 >0.4F(5) d.sub.6 >0.5F(6) N.sub.4 >1.7where F is the resultant focal length of the objective lens assembly, F.sub.1 is the focal length of the first lens component, F.sub.2 is the focal length of the second lens component, F.sub.1,2 is the resultant focal length of the first and second lens components, F.sub.1,2,3 is the resultant focal length of the first, second and third lens components, r.sub.i is the radius of curvature of the i-th surface, d.sub.i is the lens thickness or air gap of the i-th lens surface and the adjacent lens surface, and N.sub.i is the refractive index of the i-th lens.
摘要:
A miniaturized telephoto camera lens assembly comprises a first positive lens, a second negative lens, and a third positive meniscus lens having a higher object side curvature. These lenses are disposed close together, and relatively remote from closely spaced fourth and fifth positive and negative meniscus lenses, respectively, each having higher object side curvatures. The optical parameters of the lens assembly are chosen to satisfy seven specified conditions relating to composite focal distances, spacing distances, Abbe numbers, and refractive index to optimize miniaturization while still achieving a high level of optical performance.
摘要:
A differential signal transmission cable property evaluating mechanism includes a substrate having a signal line pad to be connected with a signal line conductor of a differential signal transmission cable and a ground pad to be connected with a shield conductor of the differential signal transmission cable, a pressing member for pressing the signal line conductor to the signal line pad, a shield conductor holding sheet including an elastic insulating sheet and a metal foil provided over one side of the elastic insulating sheet, the shield conductor holding sheet provided for indirectly connecting the shield conductor and the ground pad to each other by contacting the metal foil with the shield conductor and the ground pad, and a clip for fixing the shield conductor holding sheet.
摘要:
A shielded flat ribbon cable includes a plurality of insulated conductors being spaced parallel to each other, the insulated conductors each including an inner conductor and an insulation coating the inner conductor; an outer conductor bundling the insulated conductors together, the outer conductor including a first shell and a second shell in association with each other to sandwich the insulated conductors therebetween, each of the first shell and the second shell including a plurality of grooves covering outer surfaces of the insulated conductors, and a plurality of edge portions integral with both sides of the grooves, and gap formation-suppressing means for suppressing formation of gaps between the edge portions of the first shell and the edge portions of the second shell, respectively.
摘要:
A differential signal transmission cable has a pair of insulated wires, a first tape and a second tape. Each of the first and second tapes is made of a base material having an electrical insulating property and an electrical conductive film formed on at least one surface of the base material. The first tape is spirally wound around the insulated wires such that the electrical conductive film is provided outside. The second tape is spirally wound around the first tape such that the electrical conductive film of the second tape contacts with the electrical conductive film of the first tape. Among angles made by an upper edge of the insulated wires and an edge of the first tape in a side view, a first angle made on one end side of the insulated wires is an acute angle in the first tape.