Abstract: A wireless communication apparatus performs a first processing for changing the receiving beam in a first direction to determine a first angle for the receiving beam. The wireless communication apparatus performs a second processing for changing the receiving beam in the first direction from the first angle to determine a second angle that is a final angle for the receiving beam.

Abstract: A wireless communication apparatus performs a first processing for changing the receiving beam in a first direction to determine a first angle for the receiving beam. The wireless communication apparatus performs a second processing for changing the receiving beam in the first direction from the first angle to determine a second angle that is a final angle for the receiving beam.

Abstract: A radome (20) includes a first region (20A) and a second region (20B) having different radio-wave transmission characteristics from each other, and is configured to form a null pattern in substantially a front direction of an antenna by superimposing a first radio wave that has passed through the first region (20A) and a second radio wave that has passed through the second region (20B).

Abstract: The present disclosure aims to provide an antenna directivity adjustment apparatus and an antenna directivity adjustment method capable of preventing an antenna gain from being reduced and easily adjusting a direction of an antenna. An antenna directivity adjustment apparatus (1) includes: a second antenna (2) that is opposed to a radiation surface (100a) of a first antenna (100) and receives radio waves output from the first antenna (100); and an output unit (3) that is provided in the second antenna (2), converts a first beam width of the received radio waves into a second beam width wider than the first beam width, and outputs the radio waves having the second beam width.

Abstract: A mounting unit (210) securely mounts a radio wave reflection device (200) on a stable installation place such as a pole (20). A reflector unit (300) holds two reflectors (350, 360) at a tilt angle of 45°, allowing the two reflectors (350, 360) to be coaxial and rotatable independently of each other. A joint unit (220) connects the reflector unit (300) and the mounting unit (210). The joint unit (220) has rotational freedom along two axes (AZ axis and EL axis) orthogonal to each other. A radio wave reflecting device that relays, by reflection, radio communications between a first antenna device and a second antenna device distant from each other is thereby provided.

Abstract: A radome (20) includes a first region (20A) and a second region (20B) having different radio-wave transmission characteristics from each other, and is configured to form a null pattern in substantially a front direction of an antenna by superimposing a first radio wave that has passed through the first region (20A) and a second radio wave that has passed through the second region (20B).

Abstract: The present disclosure aims to provide an antenna directivity adjustment apparatus and an antenna directivity adjustment method capable of preventing an antenna gain from being reduced and easily adjusting a direction of an antenna. An antenna directivity adjustment apparatus (1) includes: a second antenna (2) that is opposed to a radiation surface (100a) of a first antenna (100) and receives radio waves output from the first antenna (100); and an output unit (3) that is provided in the second antenna (2), converts a first beam width of the received radio waves into a second beam width wider than the first beam width, and outputs the radio waves having the second beam width.

Abstract: A planar antenna according to the present invention includes a plurality of antenna elements arranged thereon and characterized in that two opposite corner parts from among corners of an N-gon (N is an even number equal to or greater than four) are cut out. For example, a planar antenna has a shape in which two opposite corner parts from among four corner parts included in a rectangle (11) (N=4) are cut out. The planar antenna may be composed by combining a plurality of square antenna units on which a plurality of antenna elements are arranged.

Abstract: A planar antenna according to the present invention includes a plurality of antenna elements arranged thereon and characterized in that two opposite corner parts from among corners of an N-gon (N is an even number equal to or greater than four) are cut out. For example, a planar antenna has a shape in which two opposite corner parts from among four corner parts included in a rectangle (11) (N=4) are cut out. The planar antenna may be composed by combining a plurality of square antenna units on which a plurality of antenna elements are arranged.

Abstract: A reflector device having first and second reflector plates to which a reflective surface is attached, respectively, at a prescribed angle of inclination in relation to an axis of rotation, wherein the first reflector plate (1) and the second reflector plate are positioned so as to face one another, and the first reflector plate and/or the second reflector plate are/is capable of rotating around the axis of rotation.

Abstract: A mounting unit (210) securely mounts a radio wave reflection device (200) on a stable installation place such as a pole (20). A reflector unit (300) holds two reflectors (350, 360) at a tilt angle of 45°, allowing the two reflectors (350, 360) to be coaxial and rotatable independently of each other. A joint unit (220) connects the reflector unit (300) and the mounting unit (210). The joint unit (220) has rotational freedom along two axes (AZ axis and EL axis) orthogonal to each other. A radio wave reflecting device that relays, by reflection, radio communications between a first antenna device and a second antenna device distant from each other is thereby provided.

Abstract: An antenna device includes a reflector which forms an offset antenna with a portion of a rotational paraboloid being cut out, and a primary radiator which radiates a beam having an elliptical cone shape to an aperture plane of the reflector. A reflector contour of the aperture plane of the reflector is formed in an elliptical shape along an isolux line of an elliptical beam radiated from the primary radiator. Accordingly, a loss due to spillover of the reflector is compensated for in a space in which the reflector contour of the present embodiment protrudes from a general reflector contour having a virtual elliptical shape formed to be perpendicular to an axis of a beam incident on an aperture plane of the reflector. In a space in which the general reflector contour protrudes from the reflector contour of the present embodiment, degradation of illuminance efficiency of the reflector is compensated.

Abstract: A reflector device having first and second reflector plates to which a reflective surface is attached, respectively, at a prescribed angle of inclination in relation to an axis of rotation, wherein the first reflector plate (1) and the second reflector plate are positioned so as to face one another, and the first reflector plate and/or the second reflector plate are/is capable of rotating around the axis of rotation.

Abstract: An antenna device includes a reflector which forms an offset antenna with a portion of a rotational paraboloid being cut out, and a primary radiator which radiates a beam having an elliptical cone shape to an aperture plane of the reflector. A reflector contour of the aperture plane of the reflector is formed in an elliptical shape along an isolux line of an elliptical beam radiated from the primary radiator. Accordingly, a loss due to spillover of the reflector is compensated for in a space in which the reflector contour of the present embodiment protrudes from a general reflector contour having a virtual elliptical shape formed to be perpendicular to an axis of a beam incident on an aperture plane of the reflector. In a space in which the general reflector contour protrudes from the reflector contour of the present embodiment, degradation of illuminance efficiency of the reflector is compensated.

Abstract: A direction deciding unit calculates a plane the perpendicular of which is a directional vector from the wireless communication apparatus toward a radio station. A group deciding unit decides, as groups, antenna combinations each consisting of some ones but not all of a plurality of antennas. A distance calculating unit calculates the distances each between the coordinates of antennas projected, in parallel with the directional vector, onto the plane, and further calculates, for each group, as a group shortest-distance of the group, the shortest one of the calculation results of the distances each between the coordinates of the antennas constituting the group. An identifying unit identifies a group the group shortest-distance of which is the longest. A plurality of communication units communicate with the radio station by use of respective ones of a plurality of antennas in the group identified by the identifying unit.

Abstract: An array antenna includes: a plurality of first antenna elements arrayed at specified element intervals on a plane of a board; a plurality of second antenna elements arrayed at the element intervals in parallel to an array direction of the first antenna elements on the plane; a first power supply circuit for supplying electric power to the respective first antenna elements by a line branched at a first branch point on the plane; and a second power supply circuit for supplying electric power to the respective second antenna elements by a line branched at a second branch point shifted by a specified distance in the array direction with respect to the first branch point on the plane.

Abstract: A direction deciding unit calculates a plane the perpendicular of which is a directional vector from the wireless communication apparatus toward a radio station. A group deciding unit decides, as groups, antenna combinations each consisting of some ones but not all of a plurality of antennas. A distance calculating unit calculates the distances each between the coordinates of antennas projected, in parallel with the directional vector, onto the plane, and further calculates, for each group, as a group shortest-distance of the group, the shortest one of the calculation results of the distances each between the coordinates of the antennas constituting the group. An identifying unit identifies a group the group shortest-distance of which is the longest. A plurality of communication units communicate with the radio station by use of respective ones of a plurality of antennas in the group identified by the identifying unit.

Abstract: An object of the present invention is to provide an antenna device that exhibits, in wireless communication of an omni-cell system for simultaneously transmitting a plurality of data corresponding to one another, excellent cost performance, and can reduce antenna loss and prevent radio wave interference. This antenna device includes a plurality of sector antennas 11 disposed so that a maximum radial direction where radiation intensity of a radio wave becomes maximum is radially set. The plurality of sector antennas 11 simultaneously transmit a plurality of wireless signals corresponding to one another.

Abstract: An array antenna includes: a plurality of first antenna elements arrayed at specified element intervals on a plane of a board; a plurality of second antenna elements arrayed at the element intervals in parallel to an array direction of the first antenna elements on the plane; a first power supply circuit for supplying electric power to the respective first antenna elements by a line branched at a first branch point on the plane; and a second power supply circuit for supplying electric power to the respective second antenna elements by a line branched at a second branch point shifted by a specified distance in the array direction with respect to the first branch point on the plane.

Abstract: A first printed circuit board for vertical polarized wave has a plurality of vertical polarized wave elements which serves as antenna elements, and a first feeder circuit which is connected to the plurality of vertical polarized wave elements. A second printed circuit board for horizontal polarized wave has a second feeder circuit which is connected to a plurality of horizontal polarized wave elements which serves as antenna elements, and is mounted with the plurality of horizontal polarized wave elements. A cutout portion is provided between the adjacent two vertical polarized wave elements of the first printed circuit board, and the first and second printed circuit boards are arranged parallel so that the horizontal polarized wave elements are arranged in the cutout portions of the first printed circuit board.