Abstract: An antenna device includes: a ground portion including a front surface; and a first element located on a side of the front surface, the first element supporting a predetermined frequency band, the first element including a main body portion spaced apart a predetermined distance from the ground portion in a direction normal to the front surface, the main body portion facing the ground portion, and an extending portion extending from the main body portion toward the ground portion, the extending portion having one end part located on a side of one end part of the main body portion, and another end part having no contact with the front surface.

Abstract: An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

Abstract: An antenna device mounted on a base plate includes an antenna element. The antenna device further includes a base composed of metal, the base being mounted on the antenna device with the antenna element. The antenna device further includes a magnetic body configured to be disposed between the base and the base plate.

Abstract: A multiple-input multiple-output (MIMO) antenna device for spatial multiplexing transmission and that includes: a front side dipole antenna arranged on a front side surface; and a rear side dipole antenna arranged on a rear side surface which faces the front side surface. The front side dipole antenna and the rear side dipole antenna have a same frequency band. The front side dipole antenna includes a front side bowtie antenna, and the rear side dipole antenna includes a rear side bowtie antenna. The front side bowtie antenna or the rear side bowtie antenna includes, at a side surface defined between the front side surface and the rear side surface of the MIMO antenna device, a side surface element portion for adjusting antenna performance which extends from the front side bowtie antenna or the rear side bowtie antenna.

Abstract: An antenna device includes: a patch antenna; and a ground portion at which the patch antenna is disposed, the ground portion having an external form obtained by forming a cutout portion in a rectangle, the cutout portion overlapping with at least a part of the patch antenna, in side view. Further, a first center of the patch antenna is shifted toward a long side of the rectangle having the cutout portion formed therein, relative to a second center of the rectangle.

Abstract: An antenna device comprising: a ground part; and an antenna provided at an end portion of the ground part, the antenna including a feeding portion and a first element extending from the feeding portion, the antenna supporting at least a first frequency band, wherein the ground part includes an arm portion defined by an outer edge of the ground part and a slit having an open end located at the outer edge and a closed end located inside the ground part, and the feeding portion is provided at the arm portion.

Abstract: An antenna comprises a substrate; and a first conductor part and a second conductor part formed on the substrate wherein the first conductor part is connected to a signal wire, the second conductor part is connected to a ground wire, and the first conductor part and the second conductor part operate as a sleeve dipole antenna.

Abstract: An antenna device (10) includes a substrate (100) including a first surface (102), a first antenna (200) provided on the substrate (100), a second antenna (300) provided on the substrate (100), and a third antenna (400) provided on the first surface (102) of the substrate (100), and a center point (CP) of the third antenna (400) is positioned on the same side as an end portion (EP2) of the second antenna (300) furthest from the first antenna (200), relative to a center line (CL) passing through a center of a line (L) connecting an end portion (EP1) of the first antenna (200) furthest from the second antenna (300) and the end portion (EP2) of the second antenna (300) furthest from the first antenna (200), or relative to a center line (CL) of the first surface (102) of the substrate (100).

Abstract: An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

Abstract: A slotted patch antenna includes a dielectric substrate, a radiation electrode which is provided on a major surface of the dielectric substrate, and a ground conductor which is disposed on a surface that is opposite to the major surface. The radiation electrode is formed with a slots having at least one of a meandering portion, a curve portion, or a folded portion. An external shape of the radiation electrode is a square, and totally two pairs of slots are formed inside the square, each of the slots being along respective sides of the square. Each of the slots is arranged so as to be line-symmetrical with respect to an axis of symmetry that is parallel with one of the sides of the square and passes through a center of the square, and to be point-symmetrical with respect to the center of the square.

Abstract: An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

Abstract: A first conductive plate (110) is located at a first surface (302) side of a substrate (300) away from the first surface (302) of the substrate (300). The first conductive plate (110) has an opening (112). A first conductive part (120) electrically connects the first conductive plate (110) and the substrate (300) to each other. A second conductive plate (210) is located at the first surface (302) side of the substrate (300) away from the first surface (302) of the substrate (300). A second conductive part (220) electrically connects the second conductive plate (210) and the substrate (300) to each other. The second conductive plate (210) is located inside the opening (112) of the first conductive plate (110).

Abstract: A patch antenna includes: a radiating element having a flat-plate shape; and a parasitic element provided at a position spaced away from the radiating element in planar view in which the radiating element is seen from a direction perpendicular to a plate surface of the radiating element. A longitudinal direction of the parasitic element is oriented along a direction of a line segment connecting a center of the radiating element and a feeding point in the planar view.

Abstract: A patch antenna includes: a radiating element having a flat-plate shape; and a parasitic element provided at a position spaced away from the radiating element in planar view in which the radiating element is seen from a direction perpendicular to a plate surface of the radiating element. A longitudinal direction of the parasitic element is oriented along a direction of a line segment connecting a center of the radiating element and a feeding point in the planar view.

Abstract: An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

Abstract: An antenna device includes: a pair of first elements that are arranged on a first plane; and a pair of second elements that are arranged on a second plane parallel to the first plane such that a polarized wave direction of the pair of second elements is orthogonal to that of the pair of first elements. Each element of the pair of first elements and the pair of second elements includes a portion that acts as a self-similarity antenna or an antenna that acts based on similar operating principle to the self-similarity antenna. In one embodiment, each element of the pair of first elements and the pair of second elements includes two arms that extend in a direction away from each other from a proximal end portion to which a feed point is connectable.

Abstract: An antenna device (10) includes a substrate (100) including a first surface (102), a first antenna (200) provided on the substrate (100), a second antenna (300) provided on the substrate (100), and a third antenna (400) provided on the first surface (102) of the substrate (100), and a center point (CP) of the third antenna (400) is positioned on the same side as an end portion (EP2) of the second antenna (300) furthest from the first antenna (200), relative to a center line (CL) passing through a center of a line (L) connecting an end portion (EP1) of the first antenna (200) furthest from the second antenna (300) and the end portion (EP2) of the second antenna (300) furthest from the first antenna (200), or relative to a center line (CL) of the first surface (102) of the substrate (100).

Abstract: A patch antenna includes a flat-plate radiating element; and a metal wall provided outside a peripheral edge of the radiating element, such that a wall surface of the metal wall intersects a line connecting a center of the radiating element and a feeding point. An antenna device for a vehicle includes: the patch antenna; a housing installed in a predetermined orientation at a predetermined position of the vehicle; and a support supporting the patch antenna such that the patch antenna is used for vertically polarized waves when the housing is installed in the predetermined orientation at the predetermined position.

Abstract: A first conductive plate (110) is located at a first surface (302) side of a substrate (300) away from the first surface (302) of the substrate (300). The first conductive plate (110) has an opening (112). A first conductive part (120) electrically connects the first conductive plate (110) and the substrate (300) to each other. A second conductive plate (210) is located at the first surface (302) side of the substrate (300) away from the first surface (302) of the substrate (300). A second conductive part (220) electrically connects the second conductive plate (210) and the substrate (300) to each other. The second conductive plate (210) is located inside the opening (112) of the first conductive plate (110).

Abstract: A slotted patch antenna includes a dielectric substrate, a radiation electrode which is provided on a major surface of the dielectric substrate, and a ground conductor which is disposed on a surface that is opposite to the major surface. The radiation electrode is formed with a slots having at least one of a meandering portion, a curve portion, or a folded portion. An external shape of the radiation electrode is a square, and totally two pairs of slots are formed inside the square, each of the slots being along respective sides of the square. Each of the slots is arranged so as to be line-symmetrical with respect to an axis of symmetry that is parallel with one of the sides of the square and passes through a center of the square, and to be point-symmetrical with respect to the center of the square.