US 10,594,045 B2Granted

Waveguide device and antenna array

AssigneesNidec Corporation, Wgr Co., Ltd.

InventorsHideki Kirino, Hiroyuki Kamo

Life of this patent

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Abstract

An antenna array according to an embodiment includes a conductive member having a first and second slots adjacent to each other. The conductive surface on a front side of the conductive member is shaped so as to define a first and second horns respectively communicating with the first and second slots. The respective E planes of slots are on the same plane, or on a plurality of planes which are substantially parallel to each other. In an E-plane cross section of the first horn, a length from one of two intersections between the E plane and an edge of the first slot to one of two intersections between the E plane and an edge of the aperture plane of the first horn is longer than a length from the other intersection between the E plane and the edge of the first slot to the other intersection between the E plane and the edge of the aperture plane of the first horn, the lengths extending along an inner wall surface of the first horn.

Claims20

Dependent claims

A waveguide device comprising:

a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side;
a waveguide member provided at the rear side of the first electrically conductive member, the waveguide member having an electrically-conductive waveguide face of a stripe shape that opposes the second electrically conductive surface, the waveguide member extending in a manner of following along the second electrically conductive surface;
a second electrically conductive member provided at the rear side of the first electrically conductive member, the second electrically conductive member supporting the waveguide member, the second electrically conductive member having a third electrically conductive surface on the front side that opposes the second electrically conductive surface, and a fourth electrically conductive surface on the rear side;
and
an artificial magnetic conductor extending on both sides of the waveguide member, the artificial magnetic conductor being provided on at least one of the second electrically conductive surface and the third electrically conductive surface, wherein,
the second electrically conductive surface, the waveguide face, and the artificial magnetic conductor define a waveguide extending in a gap between the second electrically conductive surface and the waveguide face;
the second electrically conductive member includes
a port at a position adjacent to one end of the waveguide member, the port communicating from the fourth electrically conductive surface to the waveguide, and
a choke structure at a position opposing the one end of the waveguide member via the port;
the choke structure includes an electrically-conductive ridge at a position adjacent to the port and includes one or more electrically conductive rods provided on the third electrically conductive surface with a gap from a farther end of the ridge from the port;
and
when an electromagnetic wave propagating in the waveguide has a central wavelength λ0 in free space, the ridge has a length equal to or greater than λ0/16 and less than λ0/4 in a direction along the waveguide.

9 more elements

A waveguide device comprising:

a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side;
a waveguide member provided at the rear side of the first electrically conductive member, the waveguide member having an electrically-conductive waveguide face of a stripe shape that opposes the second electrically conductive surface, the waveguide member extending in a manner of following along the second electrically conductive surface;
a second electrically conductive member provided at the rear side of the first electrically conductive member, the second electrically conductive member supporting the waveguide member, the second electrically conductive member having a third electrically conductive surface on the front side that opposes the second electrically conductive surface, and a fourth electrically conductive surface on the rear side;
and
an artificial magnetic conductor extending on both sides of the waveguide member, the artificial magnetic conductor being provided on at least one of the second electrically conductive surface and the third electrically conductive surface, wherein,
the second electrically conductive surface, the waveguide face, and the artificial magnetic conductor define a waveguide extending in a gap between the second electrically conductive surface and the waveguide face;
the first electrically conductive member includes a port provided at a position opposing a portion of the waveguide face adjacent to one end of the waveguide member, the port communicating from the first electrically conductive surface to the second electrically conductive surface;
the second electrically conductive member includes a choke structure in a region containing the one end of the waveguide member;
the choke structure comprises a waveguide member end portion and one or more electrically conductive rods, the waveguide member end portion spanning from an edge of an opening of the port to an edge of the one end of the waveguide member as projected onto the waveguide face, the one or more electrically conductive rods being provided on the third electrically conductive surface with a gap from the one end of the waveguide member;
and
when an electromagnetic wave propagating in the waveguide has a central wavelength λ0 in free space, the waveguide member end portion has a length equal to or greater than λ0/16 and less than λ0/4 in a direction along the waveguide.

8 more elements

A waveguide device comprising:

a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side;
a waveguide member provided at the rear side of the first electrically conductive member, the waveguide member having an electrically-conductive waveguide face of a stripe shape that opposes the second electrically conductive surface, the waveguide member extending in a manner of following along the second electrically conductive surface;
a second electrically conductive member provided at the rear side of the first electrically conductive member, the second electrically conductive member supporting the waveguide member, the second electrically conductive member having a third electrically conductive surface on the front side that opposes the second electrically conductive surface, and a fourth electrically conductive surface on the rear side;
and
an artificial magnetic conductor extending on both sides of the waveguide member, the artificial magnetic conductor being provided on at least one of the second electrically conductive surface and the third electrically conductive surface, wherein,
the second electrically conductive surface, the waveguide face, and the artificial magnetic conductor define a waveguide extending in a gap between the second electrically conductive surface and the waveguide face;
the second electrically conductive member includes
a port at a position adjacent to one end of the waveguide member, the port communicating from the fourth electrically conductive surface to the waveguide, and
a choke structure at a position opposing the one end of the waveguide member via the port;
the choke structure includes an electrically-conductive ridge at a position adjacent to the port and includes one or more electrically conductive rods provided on the third electrically conductive surface with a gap from a farther end of the ridge from the port;
the ridge includes a first portion adjacent to the port and a second portion adjacent to the first portion;
and
a distance between the first portion and the second electrically conductive surface is longer than a distance between the second portion and the second electrically conductive surface.

10 more elements

A waveguide device comprising:

a first electrically conductive member having a first electrically conductive surface on a front side and a second electrically conductive surface on a rear side;
a waveguide member provided at the rear side of the first electrically conductive member, the waveguide member having an electrically-conductive waveguide face of a stripe shape that opposes the second electrically conductive surface, the waveguide member extending in a manner of following along the second electrically conductive surface;
a second electrically conductive member provided at the rear side of the first electrically conductive member, the second electrically conductive member supporting the waveguide member, the second electrically conductive member having a third electrically conductive surface on the front side that opposes the second electrically conductive surface, and a fourth electrically conductive surface on the rear side;
and
an artificial magnetic conductor extending on both sides of the waveguide member, the artificial magnetic conductor being provided on at least one of the second electrically conductive surface and the third electrically conductive surface, wherein,
the second electrically conductive surface, the waveguide face, and the artificial magnetic conductor define a waveguide extending in a gap between the second electrically conductive surface and the waveguide face;
the first electrically conductive member includes a port provided at a position opposing a portion of the waveguide face adjacent to one end of the waveguide member, the port communicating from the first electrically conductive surface to the second electrically conductive surface;
the second electrically conductive member includes a choke structure in a region containing the one end of the waveguide member;
the choke structure comprises a waveguide member end portion and one or more electrically conductive rods, the waveguide member end portion spanning from an edge of an opening of the port to an edge of the one end of the waveguide member as projected onto the waveguide face, the one or more electrically conductive rods being provided on the third electrically conductive surface with a gap from the one end of the waveguide member;
at a site opposing the waveguide member end portion, the second electrically conductive surface of the first electrically conductive member includes a first portion adjacent to the port and a second portion adjacent to the first portion;
and
a distance between the first portion and the waveguide face is longer than a distance between the second portion and the waveguide face.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/150,385Filed 3 Oct 2018 · continuation
Priority: JP 2016-0756845 Apr 2016
Published: US 2019/0036230 A131 Jan 2019
Granted: 17 Mar 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification12 codes

H01Q 21/064
Two dimensional planar arrays: using horn or slot aerials
H01P 3/123
Hollow waveguides: with a complex or stepped cross-section, e.g. ridged or grooved waveguides
H01P 5/10
For linking dissimilar lines or devices: for coupling balanced lines or devices with unbalanced lines or devices
H01P 5/12
Coupling devices of the waveguide type: coupling devices having more than two ports