Waveguide device and antenna device including the waveguide device

Patent metadata

Field	Value
Publication number	US-10027032-B2
Application number	US-201615292431-A
Country	US
Kind code	B2
Filing date	Oct 13, 2016
Priority date	Oct 15, 2015
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

A waveguide device includes: a first conductive member having an electrically conductive surface; a second conductive member having a plurality of electrically conductive rods arrayed thereon, each conductive rod having a leading end opposing the conductive surface; and a waveguide member having an electrically conductive waveguide face opposing the conductive surface, the waveguide member being disposed among the conductive rods and extending along the conductive surface. The waveguide member includes at least one of a bend and a branching portion. A measure of an outer shape of a cross section of at least one of the plurality of conductive rods that is adjacent to the bend or the branching portion, taken perpendicular to an axial direction of the at least one conductive rod, monotonically decreases from a root that is in contact with the second conductive member toward a leading end.

First claim

What is claimed is:

1. A waveguide device comprising:
a first electrically conductive member having an electrically conductive surface which is shaped as a plane or a curved surface;
a second electrically conductive member having a plurality of electrically conductive rods arrayed thereon, each electrically conductive rod having a leading end opposing the electrically conductive surface of the first electrically conductive member; and
a waveguide member having an electrically conductive waveguide face opposing the electrically conductive surface of the first electrically conductive member, the waveguide member being disposed among the plurality of electrically conductive rods and extending along the electrically conductive surface, wherein,
the waveguide member includes at least one of a bend at which the direction that the waveguide member extends changes and a branching portion at which the direction that the waveguide member extends ramifies into two or more directions; and
a measure of an outer shape of a cross section of at least one of the plurality of electrically conductive rods that is adjacent to the bend or the branch, taken perpendicular to an axial direction of the at least one electrically conductive rod, monotonically decreases from a root that is in contact with the second electrically conductive member toward the leading end.

2. The waveguide device of claim 1 , wherein the at least one electrically conductive rod has a side face which is tilted with respect to the axial direction of the electrically conductive rod.

3. The waveguide device of claim 1 , wherein the waveguide member is a ridge on the second electrically conductive member.

4. The waveguide device of claim 2 , wherein the waveguide member is a ridge on the second electrically conductive member.

5. The waveguide device of claim 1 , wherein,
the waveguide device is used for at least one of transmission and reception of an electromagnetic wave of a predetermined band;
an electromagnetic wave that has a highest frequency among electromagnetic waves in the predetermined band has a wavelength λmin free space; and
electrically conductive rods among the plurality of electrically conductive rods that are adjacent to the waveguide member have a height which is smaller than λm/2.

6. The waveguide device of claim 4 , wherein,
the waveguide device is used for at least one of transmission and reception of an electromagnetic wave of a predetermined band;
an electromagnetic wave that has a highest frequency among electromagnetic waves in the predetermined band has a wavelength λmin free space; and
electrically conductive rods among the plurality of electrically conductive rods that are adjacent to the waveguide member have a height which is smaller than λm/2.

7. The waveguide device of claim 5 , wherein the distance between the electrically conductive surface and the waveguide face is λm/4 or less.

8. The waveguide device of claim 6 , wherein the distance between the electrically conductive surface and the waveguide face is λm/4 or less.

9. The waveguide device of claim 5 , wherein the distance between the electrically conductive surface and the root of each electrically conductive rod is smaller than λm/2.

10. The waveguide device of claim 8 , wherein the distance between the electrically conductive surface and the root of each electrically conductive rod is smaller than λm/2.

11. The waveguide device of claim 1 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

12. The waveguide device of claim 2 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

13. The waveguide device of claim 3 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

14. The waveguide device of claim 4 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

15. The waveguide device of claim 5 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

16. The waveguide device of claim 6 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

17. The waveguide device of claim 10 , wherein the area of a cross section of the at least one electrically conductive rod taken perpendicular to the axial direction is smaller at the leading end than at the root that is in contact with the second electrically conductive member.

18. An antenna device comprising:
the waveguide device of claim 1 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

19. An antenna device comprising:
the waveguide device of claim 2 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

20. An antenna device comprising:
the waveguide device of claim 3 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

21. An antenna device comprising:
the waveguide device of claim 4 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

22. An antenna device comprising:
the waveguide device of claim 5 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

23. An antenna device comprising:
the waveguide device of claim 11 ; and
an antenna element being connected to a waveguide extending between the electrically conductive surface and the waveguide face of the waveguide device to allow an electro-magnetic wave having propagated through the waveguide to be emitted into space.

24. An antenna device comprising:
the waveguide device of claim 12 ; and
an antenna element being connected to a waveguide extending between the ele

Assignees

• Nidec Corp
• Wgr Co Ltd

Inventors

• Kirino Hideki
• Kamo Hiroyuki

Classifications

• H01Q21/0006

  Particular feeding systems · CPC title

• H01Q21/064

  using horn or slot aerials (slotted waveguides arrays H01Q21/005) · CPC title

• H01Q13/16 Primary

  Folded slot antennas · CPC title

• H01P3/00 Primary

  Waveguides; Transmission lines of the waveguide type · CPC title

• H01Q11/14

  with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effect (H01Q11/20 takes precedence) · CPC title