Horn antenna

Patent metadata

Field	Value
Publication number	US-2017288291-A1
Application number	US-201615511435-A
Country	US
Kind code	A1
Filing date	May 31, 2016
Priority date	Jun 3, 2015
Publication date	Oct 5, 2017
Grant date	—

Abstract

Lower-limit frequency reflection characteristics of a horn antenna are improved even though element spacing, of less than or equal to one wavelength, is a spacing at which grating lobes do not occur in an antenna radiation pattern. The horn antenna includes a horn antenna and a conductor grid that divides an aperture A of the horn antenna in a grid pattern and that electrically connects to an inner surface of the horn antenna at the aperture A of the horn antenna. Width of the conductor grid in a direction orthogonal to a horn antenna aperture plane differs from electrical length of the path of the horn antenna of the conductor grid portion at the frequency of power supplied to the horn antenna.

First claim

1 . A horn antenna comprising:
a horn antenna; and a conductor grid to divide an aperture of the horn antenna in a grid shape and electrically connect to an inner surface of the horn antenna at the aperture of the horn antenna, wherein a width of the conductor grid in a direction orthogonal to an aperture plane of the horn antenna is different from an electrical length, at a frequency of power supplied to the horn antenna, of a path of a portion of the horn antenna at the conductor grid.

2 . The horn antenna according to claim 1 , wherein the conductor grid is meanderingly shaped in the direction orthogonal to the aperture plane of the horn antenna.

3 . The horn antenna according to claim 2 , wherein the conductor grid comprises:
a conductor pattern having a grid-like shape intermittently arranged alternatingly at a front and a back of a dielectric plate in which the aperture of the horn antenna is arranged; and vias connecting the conductor pattern of the front and the back.

4 . The horn antenna according to claim 1 , wherein the conductor grid is bent and tilted in the direction orthogonal to the aperture plane of the horn antenna.

5 . The horn antenna according to claim 1 , wherein the conductor grid comprises:
conductor patterns intermittently formed in the grid shape on a dielectric plate in which the aperture of the horn antenna is arranged; and reactance elements interconnecting the conductor patterns, the interconnected conductor patterns being mutually adjacent.

6 . The horn antenna according to claim 1 , wherein the conductor grid comprises a conductor pattern continuously formed in the grid shape on a dielectric plate in which the aperture of the horn antenna is arranged.

7 . The horn antenna according to claim 1 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

8 . The horn antenna according to claim 1 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

9 . An array antenna comprising:
a plurality of horn antennas according to claim 1 disposed in a matrix pattern.

10 . The horn antenna according to claim 2 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

11 . The horn antenna according to claim 3 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

12 . The horn antenna according to claim 4 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

13 . The horn antenna according to claim 5 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

14 . The horn antenna according to claim 6 , wherein the conductor grid is fixed by a conductor to the inner surface of the horn antenna.

15 . The horn antenna according to claim 2 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

16 . The horn antenna according to claim 3 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

17 . The horn antenna according to claim 4 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

18 . The horn antenna according to claim 5 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

19 . The horn antenna according to claim 6 , wherein the conductor grid is fixed to the inner surface of the horn antenna through an electrically conductive elastic body.

Assignees

• Mitsubishi Electric Corp

Inventors

• Arai Shinji
• Takahashi Tomohiro

Classifications

• H01Q13/06

  Waveguide mouths (horns H01Q13/02) · CPC title

• H01Q15/24

  Polarising devices; Polarisation filters  (H01Q15/12, H01Q15/22 take precedence) · CPC title

• H01Q15/10

  comprising three-dimensional [3D] array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric · CPC title

• H01Q21/06

  Arrays of individually energised antenna units similarly polarised and spaced apart · CPC title

• H01P11/006 Primary

  Manufacturing dielectric waveguides · CPC title