Denki Kogyo Company, Limited

Dkk Co., Ltd.

Ichiro Oshima

Keisuke Sato

Takayoshi Sasaki

Keizo Cho

Takuya Seki

Hitoshi Onoda

Tanan Hongnara

Naobumi Michishita

Katsumori Sasaki

Yoshiki Shirasawa

Provided is a reflect array that enables reflectance at a plurality of angles of incidence while maintaining a high gain without causing a decrease in the electric field intensity of a reflector plate, and that can simplify the installation of the reflect array. In the reflect array, a plurality of first elements and a plurality of second elements are arranged on XY plane. The first elements are arranged in Y direction to form a first row of elements. The second elements are arranged in Y direction to form a second row of elements. The first element rows and the second element rows are alternately arranged in X direction. The two angles of maximum reflectance are on the same positive or negative side of X-axis.

Reflect array, reflect array system, communication system, wall material with built-in reflect array, and mobile communication system

The present invention realizes a thin dual-polarized leaky-wave antenna which uses a CRLH (Composite Right/Left Handed) transmission line and capable of obtaining a high tilt angle in a directivity in the vertical plane while suppressing cross polarization and side lobe at a target operation frequency. Specifically, the present invention provides a leaky-wave antenna including a dielectric substrate, a ground surface formed on a bottom surface of the dielectric substrate, a ground unit formed on a top surface of the dielectric substrate, and a CRLH (Composite Right/Left Handed) transmission line which is arranged adjacent to the ground unit and formed on a top surface of the dielectric substrate and uses a coplanar transmission line with a ground, in which a series capacitor (C) and a parallel inductor (L) constituting the CRLH transmission line are formed on a top surface of the dielectric substrate.

Leaky-wave antenna

To provide a leaky-wave antenna that allows dual-polarization without limiting an emission range to either side. The antenna includes as an element unit (AE) a CRLH transmission line configured by multiply connecting CRLH unit cells (UC) in a periodic fashion between one ends and the other ends of two parallel lines (La, Lb). The respective unit cells (UC) have a left-handed series capacitor (CC) on each of the two parallel lines (La, Lb) and have a left-handed parallel inductor (L) between the two parallel lines (La, Lb). When power is fed between the two parallel lines (La, Lb), the two parallel lines (La, Lb) and the series capacitor (CC) serve to emit a vertical polarization component, and the parallel inductor (L) and a conductor between the two parallel lines (La, Lb) serve to emit a horizontal polarization component.

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Tokyo, Japan

Ichiro Oshima