Abstract: An antenna apparatus includes a ground substrate, a feeding point provided on the ground substrate, a first loop antenna of which one end is electrically connected to the feeding point and of which another end is electrically connected to the ground substrate and moreover which operates at a first frequency, and a second loop antenna of which both ends are respectively connected to a first end point and a second end point of the first loop antenna and which operates at a second frequency. A space between the first end point and the second end point forms a gap with a range in which the first loop antenna is capable of resonating at the first frequency.

Abstract: An antenna device includes a substrate ground having a planar surface, a planar radiation element disposed in parallel and opposite to a planar portion of the substrate ground, a power feeding point connected to the planar radiation element, and a ground portion forming a stacked body in which, on a radiation surface side, ground patterns made of a conductive material are stacked from the radiation surface in a radiation direction perpendicular to the radiation surface. The ground pattern in each of layers of the stacked body is formed inwardly of a portion immediately overlying the ground pattern in another layer located on the radiation surface side, non-ground portions in which the conductive material is not disposed being formed in a portion immediately overlying the radiation surface, and the non-ground portions in the individual layers are formed to be gradually enlarged in the radiation direction.

Abstract: A printed circuit board includes a dielectric substrate which is formed in a plate-like shape, ground conductor layers which are respectively provided on a top surface and a back surface of the dielectric substrate, a signal line which is provided on a side surface of the dielectric substrate, and transmits a high frequency signal, and a plurality of connection conductors which are provided in the dielectric substrate, connects the ground conductor layer provided on the top surface and the ground conductor layer provided on the back surface, and are aligned and disposed along the signal line.

Abstract: An antenna device includes a substrate ground having a planar surface, a planar radiation element disposed in parallel and opposite to a planar portion of the substrate ground, a power feeding point connected to the planar radiation element, and a ground portion forming a stacked body in which, on a radiation surface side, ground patterns made of a conductive material are stacked from the radiation surface in a radiation direction perpendicular to the radiation surface. The ground pattern in each of layers of the stacked body is formed inwardly of a portion immediately overlying the ground pattern in another layer located on the radiation surface side, non-ground portions in which the conductive material is not disposed being formed in a portion immediately overlying the radiation surface, and the non-ground portions in the individual layers are formed to be gradually enlarged in the radiation direction.

Abstract: An antenna apparatus includes a ground substrate, a feeding point provided on the ground substrate, a first loop antenna of which one end is electrically connected to the feeding point and of which another end is electrically connected to the ground substrate and moreover which operates at a first frequency, and a second loop antenna of which both ends are respectively connected to a first end point and a second end point of the first loop antenna and which operates at a second frequency. A space between the first end point and the second end point forms a gap with a range in which the first loop antenna is capable of resonating at the first frequency.

Abstract: An antenna apparatus includes a ground substrate, a feeding point provided on the ground substrate, a first conductor device of which one end is electrically connected to the feeding point and which has a plate shape being parallel to the ground substrate, a second conductor device which is arranged between the first conductor device and the ground substrate, of which one end is electrically connected to the ground substrate, and which has a plate shape being parallel to the ground substrate and a connecting portion which electrically connects another end of the first conductor device and another end of the second conductor device to each other. A width of the first conductor device is wider than a width of the second conductor device. Lengths of the first conductor device and the second conductor device are ½ of a wavelength of a radio wave for operating the antenna apparatus.

Abstract: Provided is an example of a technology capable of accurately controlling impedance. Provided is a substrate including a first through hole that penetrates a substrate from a first face to a second face of the substrate, and is electrically connected to a transmission line through which a signal is transmitted, a second through hole that is provided adjacent to the first through hole in plan view of the substrate, penetrates the substrate from the first face to the second face, and is electrically connected to a ground, and an adjustment unit that adjusts a distance between the first through hole and the second through hole in plan view of the substrate to adjust an impedance of a connection end of the first through hole with the transmission line.

Abstract: There is provided an antenna device configured to be shaped as a sheet. The antenna device includes an antenna portion provided on one surface of the sheet and configured to implement at least one of transmission of a transmission wave and reception of a reflected wave from a target, and an absorption unit provided on the other surface of the sheet and configured to absorb spurious.

Abstract: There is provided an antenna device configured to be shaped as a sheet. The antenna device includes an antenna portion provided on one surface of the sheet and configured to implement at least one of transmission of a transmission wave and reception of a reflected wave from a target, and an absorption unit provided on the other surface of the sheet and configured to absorb spurious.