Abstract: A planar antenna includes a planar radiation conductor 11, a common ground conductor 32, a first strip conductor 21 located between the planar radiation conductor 11 and the common ground conductor 32 and extending in a direction in parallel to a first axis in a first right rectangular coordinate system including first, second, and third axes, a second strip conductor 22 located between the planar radiation conductor and the common ground conductor and extending in a direction orthogonal to a direction of extension of the first strip conductor, and at least one pair of passive conductors 12 to 15 each including a side at an angle of 45±3° or ?45±3° with respect to the first axis and opposed to the planar radiation conductor.

Abstract: A multi-band antenna is capable of transmitting/receiving electromagnetic waves at least in a first wavelength band of a first center wavelength ?1 and a second wavelength band of a second center wavelength ?2, which is shorter than the first center wavelength ?1, the multi-band antenna including at least one antenna unit, wherein the at least one antenna unit includes: a first radiation conductor; and a first ground conductor spaced apart from the first radiation conductor with a dielectric having a relative dielectric constant ?r interposed therebetween, wherein: the first radiation conductor and the first ground conductor each have a planar shape having a pair of opposing first sides; and a distance Lrf1 between the pair of opposing first sides of the first radiation conductor and a distance Lg1 between the pair of opposing sides of the first ground conductor satisfy expressions below: 0.2?1/?r1/2?Lrf1?0.7?1/?r1/2; and 0.7?2/?r1/2?Lg1?1.75?2/?r1/2.

Abstract: A planar antenna includes a planar radiation conductor 11, a common ground conductor 32, a first strip conductor 21 located between the planar radiation conductor 11 and the common ground conductor 32 and extending in a direction in parallel to a first axis in a first right rectangular coordinate system including first, second, and third axes, a second strip conductor 22 located between the planar radiation conductor and the common ground conductor and extending in a direction orthogonal to a direction of extension of the first strip conductor, and at least one pair of passive conductors 12 to 15 each including a side at an angle of 45±3° or ?45±3° with respect to the first axis and opposed to the planar radiation conductor.

Abstract: A multi-band antenna is capable of transmitting/receiving electromagnetic waves at least in a first wavelength band of a first center wavelength ?1 and a second wavelength band of a second center wavelength ?2, which is shorter than the first center wavelength ?1, the multi-band antenna including at least one antenna unit, wherein the at least one antenna unit includes: a first radiation conductor; and a first ground conductor spaced apart from the first radiation conductor with a dielectric having a relative dielectric constant sr interposed therebetween, wherein: the first radiation conductor and the first ground conductor each have a planar shape having a pair of opposing first sides; and a distance Lrf1 between the pair of opposing first sides of the first radiation conductor and a distance Lg1 between the pair of opposing sides of the first ground conductor satisfy expressions below: 0.2?1/?r1/2?Lrf1?0.7?1/?r1/2 ; and 0.7?2/?r1/2?Lg1?1.75?2/?r1/2.

Abstract: A planar antenna includes a multilayer ceramic body 10 having an upper surface and a lower surface, and including a plurality of ceramic layers stacked together, at least one radiation conductor 31 positioned at one of interfaces between the plurality of ceramic layers in the multilayer ceramic body or on the upper surface of the multilayer ceramic body, a ground conductor 32 positioned at another one of the interfaces between the plurality of ceramic layers in the multilayer ceramic body or on the lower surface of the multilayer ceramic body, and a low-dielectric-constant region 115 positioned in the multilayer ceramic body between the radiation conductor and the ground conductor, and having a plurality of hollow portions.

Abstract: A planar antenna includes: a multilayer ceramic structure 10 having an upper surface and a lower surface and including a plurality of ceramic layers stacked with each other; at least one radiation conductor 31 located at one of interfaces between the ceramic layers 10; and a ground conductor 32 located on the lower surface of the multilayer ceramic structure or at one of the interfaces between the ceramic layers that is on a lower surface side of the radiation conductor.

Abstract: The purpose of the present invention is to provide a base fabric for airbags with excellent deployment speed, internal pressure retention and workability, and an airbag using the same. The inventive base fabric for airbags has resin arranged in at least one surface of the cloth which comprises synthetic fibers, and is characterized in that the amount of resin adhered is from 10 to 50 g/m2 and, further, the weaving thread's filaments is exposed on the resin surface, and the weaving thread's filaments exposure rate is from 1 to 25%.

Abstract: The purpose of the present invention is to provide a base fabric for airbags with excellent deployment speed, internal pressure retention and workability, and an airbag using the same. The inventive base fabric for airbags has resin arranged in at least one surface of the cloth which comprises synthetic fibers, and is characterized in that the amount of resin adhered is from 10 to 50 g/m2 and, further, the weaving thread's filaments is exposed on the resin surface, and the weaving thread's filaments exposure rate is from 1 to 25%.

Abstract: An object of the present invention is to provide a base fabric suitable for the production of a general-purpose airbag having a higher airtight performance with reduced air permeability, a high pressure resistance in the boundary portion between the inflating part and the non-inflating part, and a high impact absorption for an occupant, and a base fabric for an airbag of the present invention comprises a woven fabric formed of a multifilament synthetic fiber having a total fineness of 200 to 550 dtex and a single filament fineness of 2.0 to 7.0 dtex, wherein the elongation is, on average of warp and weft, from 5 to 15% and from 15 to 30% under loads of 50 N/cm and 300 N/cm, respectively, and the pullout resistance of the constituent yarn is from 50 to 200 N/cm/cm on average of warp and weft.

Abstract: An object of the present invention is to provide a base fabric suitable for the production of a general purpose airbag having a higher airtight performance with reduced air permeability, a high pressure resistance in the boundary portion between the inflating part and the non-inflating part, and a high impact absorption for an occupant, and a base fabric for an airbag of the present invention comprises a woven fabric formed of a multifilament synthetic fiber having a total fineness of 200 to 550 dtex and a single filament fineness of 2.0 to 7.0 dtex, wherein the elongation is, on average of warp and weft, from 5 to 15% and from 15 to 30% under loads of 50 N/cm and 300 N/cm, respectively, and the pullout resistance of the constituent yarn is from 50 to 200 N/cm/cm on average of warp and weft.