Antenna apparatus

Patent metadata

Field	Value
Publication number	US-10601143-B2
Application number	US-201616069093-A
Country	US
Kind code	B2
Filing date	Feb 26, 2016
Priority date	Feb 26, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A plurality of primary radiators ( 1 ) is classified by combinations of frequency and polarization of radiated radio waves, a plurality of primary radiators ( 1 ) belonging to the same class is arranged at positions corresponding to vertexes of one of triangles in a repeated triangle pattern TR Pattern , and the shape of a main reflector ( 2 ) and the shape and arrangement of the repeated triangle pattern TR Pattern are determined such that a direction of a line segment passing through positions corresponding to two vertexes in the triangle is different from a radiation direction of a sidelobe of a radio wave reflected by a main reflector ( 2 ) after having been radiated from a primary radiator ( 1 ) arranged at a position corresponding to the vertexes.

First claim

The invention claimed is:

1. An antenna apparatus comprising:
a plurality of primary radiators for radiating radio waves; and
a main reflector for reflecting the radio waves radiated from the plurality of primary radiators, wherein
the plurality of primary radiators is subdivided into a plurality of classes by combination of frequency and polarization of the radiated radio waves, each class comprising at least three primary radiators radiating radio waves having the same combination of frequency and polarization,
the main reflector reflects the radio waves radiated from the Plurality of classes, the radio waves reflected by the main reflector having a main lobe and sidelobes, a direction of the sidelobes being defined with respect to the main lobe as a feature based on a shape of the main reflector,
a plurality of primary radiators belonging to a same class is arranged, in a repeated triangle pattern in which a triangle is arranged repeatedly, at positions corresponding to vertexes of each triangle, and
the shape of the main reflector and a shape and arrangement of the repeated triangle pattern are determined such that a direction of a line segment passing through positions corresponding to two vertexes of each triangle in the repeated triangle pattern is different from the direction of the sidelobes.

2. The antenna apparatus according to claim 1 , wherein an aperture shape of the main reflector is a parallelogram, and
the repeated triangle pattern includes one or more triangles so as to form a same shape as the aperture shape.

3. The antenna apparatus according to claim 1 , wherein an aperture shape of the main reflector is a hexagon, and
the repeated triangle pattern includes one or more triangles so as to form a same shape as the aperture shape.

4. The antenna apparatus according to claim 1 , wherein an aperture shape of the main reflector is a triangle, and
the repeated triangle pattern includes one or more triangles so as to form a same shape as the aperture shape.

5. The antenna apparatus according to claim 1 , wherein each of the plurality of primary radiators includes a plurality of radiating elements, and
the antenna apparatus further comprises a beam forming circuit for exciting the plurality of radiating elements.

6. The antenna apparatus according to claim 1 , further comprising a secondary reflector for reflecting the radio waves radiated from the plurality of primary radiators toward the main reflector.

Assignees

• Mitsubishi Electric Corp

Inventors

• Tomura Takashi
• Takikawa Michio
• Inasawa Yoshio

Classifications

• H01Q25/007

  using two or more primary active elements in the focal region of a focusing device (for operation on different wavebands H01Q5/22) · CPC title

• H01Q19/17

  the primary radiating source comprising two or more radiating elements (H01Q19/15, H01Q25/00 take precedence) · CPC title

• H01Q19/19

  comprising one main concave reflecting surface associated with an auxiliary reflecting surface · CPC title

• H01Q19/192 Primary

  with dual offset reflectors · CPC title

• H01Q1/288 Primary

  Satellite antennas · CPC title