Other

Nippon Steel Corporation

Tokyo Institute of Technology

Japan Aerospace Exploration Agency

Jiro Hirokawa

Naohisa Goto

Makoto Ando

Masahiro Uematsu

Takashi Ojima

Hirobumi Saito

Nobuharu Takahashi

Budhaditya Pyne

An antenna device includes: an antenna panel; one input terminal through which a high-frequency signal is input; and a feeding circuit which distributes the high-frequency signal input to the input terminal to a plurality of antenna elements provided on the antenna panel. The feeding circuit includes: at least one first-stage branch circuit which includes one input and two outputs; at least two second-stage branch circuits which receive outputs of the first-stage branch circuit and include one input and two outputs; and a combining circuit which includes two inputs and one output and receives two outputs selected from the outputs of the first-stage branch circuit and outputs of the second-stage branch circuit.

Antenna device

A slotted leaky waveguide array antenna of a one-axis tracking type wherein a feed section including a feed probe is kept in a stationary state to thereby keep a converter in a stationary state and a desired beam width is set in a tilt direction, includes a plurality of radiation waveguides arranged adjacent and parallel to each other, each of which has a plurality of slots arranged in a waveguide axial direction, and a feed waveguide for distributing to the respective radiation waveguides electromagnetic waves received through a feed section from a converter, and the antenna rotates in a substantially horizontal plane to track an azimuth direction, wherein the feed waveguide has a first section extended along one ends of the radiation waveguides and a second section extended from the feed section provided in the rotary center of the slotted leaky waveguide array antenna to the center of the first section, and wherein the radiation waveguides are formed with crossed slots having an identical offset, and the number of the crossed slots is preferably selected between 13 and 17.

Slotted leaky waveguide array antenna

Growing community of inventors

Tokyo, Japan

Jiro Hirokawa