Abstract: An antenna includes antenna elements provided one by one on the respective sides of a substantially rectangular conductor plate. Each of the antenna elements includes a feeding wire and a split ring conductor having a shape in which a ring is partially cut by a split part. The feeding wire is electrically connected to the split ring conductor and extends in a direction across a region formed inside the split ring conductor. Two antenna elements provided on two arbitrary sides facing each other of the conductor plate among the four antenna elements are each supplied with power through the feeding wire included in each antenna element so as to have substantially the same direction of an electric field in a polarization direction.

Abstract: A split ring resonator includes a first conductive member having a split ring shape, a second conductive member, and a third conductive member. The second and third conductive members have a split therebetween and are electrically connected with different ends of the first conductive member. The second conductive member includes a first portion belonging to a first layer substantially parallel to a plane to which the first conductive member belongs, a second portion belonging to a second layer substantially parallel to the plane and facing the first layer, and a third portion electrically connecting the first and second portions. The third conductive member includes fourth and fifth portion respectively belonging to the first and second layers, and a sixth portion electrically connecting the fourth and fifth portions. At least parts of the first and fifth portions face each other in a direction substantially perpendicular to the plane.

Abstract: An antenna device comprises a plurality of antennas. The antennas include first antennas which form a first array and second antennas which form a second array. The first antennas include two first predetermined antennas arranged along a first line. A longitudinal direction of one of the first predetermined antennas and another longitudinal direction of a remaining one of the first predetermined antennas intersect with each other and define a horizontal plane. Each first antenna mainly radiates a horizontally polarized wave which is in parallel to the horizontal plane. Each second antenna mainly radiates a vertically polarized wave which is perpendicular to the horizontal plane. The second antennas include two second predetermined antennas arranged along a second line. When the first and second lines are projected onto the horizontal plane along a direction perpendicular to the horizontal plane, the first and second lines intersect with each other.

Abstract: A transmission line having, for example, a first frequency-selecting surface.

Abstract: Antenna has a split ring resonator. Moreover, the antenna is provided with a first conductor and a second conductor which form, at least in part, an open stub or a short stub which has a predetermined electrical length. With this structure, the antenna can have a plurality of operating frequencies.

Abstract: A split-ring resonator comprises a first ground terminal which is separated from a ground pattern.

Abstract: Provided is a conductor, for example, equipped with a split-ring resonator, and an opening, wherein a split in the split-ring resonator and the opening are spatially continuous.

Abstract: An antenna includes a split-ring conductive portion and a ring-inside conductive portion. The split-ring conductive portion is positioned outside a region and is positioned in an area which extends along an outline of the region except for a split. The ring-inside conductive portion is positioned inside the region. The ring-inside conductive portion is continuous with one of parts of the split-ring conductive portion, the split being put between the parts of the split-ring conductive portion. At least a part of the ring-inside conductive portion is bent so as to extend parallel to the split-ring conductive portion.

Abstract: An object is to advantageously control a phase of an electromagnetic wave with high efficiency at target operational frequency band. A phase control device (10) comprising a two-dimensional array of three-dimensional units (101) and configured to shift a phase of an electromagnetic wave passing through the three-dimensional units (101). The two nearest three-dimensional units (101) having same phase shift coverage are configured such that the distance difference from phase center of the phase control device (10) to the units (101) is a wavelength of a reference frequency fk, and the reference frequency fk is higher than center frequency fc of operational frequency band and not higher than the highest frequency fh of the operational frequency band.

Abstract: A multi-resonant antenna is provided with a main antenna and an additional radiation element. The main antenna is provided with a main portion, which forms a split ring, and a feeding portion, which branches off from the main portion. The additional radiation element extends outward of the main antenna from the main antenna.

Abstract: An antenna comprises a split ring resonator. The antenna has a main portion, a feeding portion and at least one radiation element. The main portion forms a split ring. The feeding portion is provided on the main portion. The radiation element extends from the main portion.

Abstract: An antenna includes antenna elements provided one by one on the respective sides of a substantially rectangular conductor plate. Each of the antenna elements includes a feeding wire and a split ring conductor having a shape in which a ring is partially cut by a split part. The feeding wire is electrically connected to the split ring conductor and extends in a direction across a region formed inside the split ring conductor. Two antenna elements provided on two arbitrary sides facing each other of the conductor plate among the four antenna elements are each supplied with power through the feeding wire included in each antenna element so as to have substantially the same direction of an electric field in a polarization direction.

Abstract: The present invention provides a phase control plate including n layers (n?4) of overlapping admittance sheets (10-1 to 10-6) each of which includes a plurality of plane unit cells, in which an admittance of a first plane unit cell included in an admittance sheet in a layer a (1?a?n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1?b?n and b?a) and overlapping the first plane unit cell are different from each other.

Abstract: An antenna includes a conductor plate, for example. The conductor plate has a slot and a branch slot, wherein the branch slot has one end connected to the slot and another end which, when viewed from the one end, extends along the slot in an antinode direction of an electric field at the lowest-order resonant frequency of the antenna, and is closed in the conductor plate.

Abstract: A split ring resonator includes a first conductive member having a split ring shape, a second conductive member, and a third conductive member. The second and third conductive members have a split therebetween and are electrically connected with different ends of the first conductive member. The second conductive member includes a first portion belonging to a first layer substantially parallel to a plane to which the first conductive member belongs, a second portion belonging to a second layer substantially parallel to the plane and facing the first layer, and a third portion electrically connecting the first and second portions. The third conductive member includes fourth and fifth portion respectively belonging to the first and second layers, and a sixth portion electrically connecting the fourth and fifth portions. At least parts of the first and fifth portions face each other in a direction substantially perpendicular to the plane.

Abstract: Provided is an antenna element resistant to loss of electrical performance even when water droplets become attached thereto. The antenna element of the present invention is provided with a conductor portion and is characterized in that, at a location on a surface of the conductor portion in which the field intensity during operation is stronger than in other locations, a first dielectric having a thickness of not less than 0.005? is formed, wherein ? is the vacuum wavelength of the electromagnetic waves of an antenna operation frequency.