Nec Corporation

Japan Aviation Electronics Industry, Limited

Eiji Hankui

Hiroshi Toyao

Keishi Kosaka

Yasuhiko Matsunaga

Osamu Hashiguchi

Takashi Harada

Toshihide Kuriyama

Mingqi Wu

Hideki Sasaki

Takeshi Ebisawa

Yoshiaki Kasahara

Mariko Koyama

Naoki Kobayashi

Yukio Yokoyama

Shinya Nakamura

Muneo Fukaishi

Naoya Tamaki

Tomoya Kaneko

Takahide Yoshida

Koichiro Nakase

Takuya Kojima

Laurent Desclos

Kiyoshi Asao

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.

Antenna device

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.

Antenna, board and communication device

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.

Split ring resonator and communication device

Antenna

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

Split-ring resonator, board and connector

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.

Conductor, antenna, and communication device

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

Phase control device, antenna system, and phase control method

The present invention provides a phase control plate including n layers (n&#x2265;4) of overlapping admittance sheets (-to-) 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&#x2264;a&#x2264;n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1&#x2264;b&#x2264;n and b&#x2260;a) and overlapping the first plane unit cell are different from each other.

Phase control plate

The present invention provides a polarization control plate including n layers (n&#x2265;4) of overlapping admittance sheets (-to-) 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&#x2264;a&#x2264;n) and an admittance of a second plane unit cell being included in an admittance sheet in a layer b (1&#x2264;b&#x2264;n and b&#x2260;a) and overlapping the first plane unit cell are different from each other, and an admittance of the plane unit cell in an x direction and an admittance of the plane unit cell in a y direction are different from each other.

Polarization control plate

It has been difficult to suppress electromagnetic wave that propagates within a suspended substrate. The structure according to the present invention is provided with: a first conductor plane and a second conductor plane that are disposed parallel to each other; a dielectric plane that is disposed between the first and second conductor planes via a hollow region so as to be parallel to the first and second conductor planes; a first transmission line disposed on a surface that is of the dielectric plane and that opposes the first conductor plane; and a second transmission line disposed on a surface that is of the dielectric plane and that opposes the second conductor plane, wherein the first transmission line and the second transmission line are electrically connected to each other.

Structural body, laminated structure of structural body, and antenna structure

To provide a compact antenna capable of corresponding to a plurality of frequency bands. In a first frequency characteristic adjustment unit, the susceptance thereof varies according to a frequency of an input signal. A second frequency characteristic adjustment unit is connected to the first frequency characteristic adjustment unit and the reactance thereof varies according to the frequency of the input signal. A third frequency characteristic adjustment unit is connected to the second frequency characteristic adjustment unit, the susceptance thereof varies according to the frequency of the input signal. A feeding unit is configured to input a signal of any frequency in a plurality of different frequencies to the second frequency characteristic adjustment unit. A sign of the reactance of the second frequency characteristic adjustment unit at the frequency of the signal input from the feeding unit is the same as those of the susceptances of the first frequency characteristic adjustment unit and the third frequency characteristic adjustment unit.

Antenna and wireless communication device

A noise suppression structure for suppressing an undesired high-frequency current in a transmission line (i.e. a sleeve) of a short-circuited termination type includes a conductor base encompassing the periphery of the transmission line and a conductor short-circuiting part which is connected to the transmission line at the opposite side to an open end of the conductor base and whose inductance is greater than that of the conductor base. It is possible to increase an inductance by modifying the shape of the terminal end of the sleeve, equivalent to a quarter wavelength of an undesired high-frequency current which occurs in a wireless circuit of a mobile wireless terminal and flows through a ground layer, thus reducing the entire length and realizing miniaturization while securing desired input impedance.

Growing community of inventors

Tokyo, Japan

Eiji Hankui