ANTENNA DEVICE - MITSUBISHI ELECTRIC CORP

Title:

ANTENNA DEVICE

Document Type and Number:

WIPO Patent Application WO/2006/064536

Kind Code:

A1

Abstract:

An antenna device, wherein a disk-like reflector (3) reflecting radio radiated from the opening surface (1a) of a circular waveguide (1) is disposed on the circular waveguide (1) at a position facing the opening surface (1a) thereof, and an annular waveguide (4) forming the radiation characteristics of the radio reflected on the disk-like reflector (3) to rotationally symmetric radiation characteristics is formed around the disk-like reflector (3). Even when a large number of grooves (4a) must be formed to provide the rotationally symmetric radiation characteristics, the radial dimension of the disk-like reflector (3) must not be increased. Accordingly, since the presence of an auxiliary reflector does not result in the rise of side lobe level and the deterioration of gain, the gain can be increased, cross polarization can be reduced, and side lobe can be reduced.

Inventors:

ARAMAKI YOJI (JP)
YONEDA NAOFUMI (JP)
KONISHI YOSHIHIKO (JP)
NAITO IZURU (JP)
HORIE TOSHIYUKI (JP)
NUIMURA SHUJI (JP)

Application Number:

PCT/JP2004/018585

Publication Date:

June 22, 2006

Filing Date:

December 13, 2004

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
ARAMAKI YOJI (JP)
YONEDA NAOFUMI (JP)
KONISHI YOSHIHIKO (JP)
NAITO IZURU (JP)
HORIE TOSHIYUKI (JP)
NUIMURA SHUJI (JP)

International Classes:

H01Q13/02; H01Q19/18

Foreign References:

JPS62202605A	1987-09-07
JPH0642611B2	1994-06-01
JPH0448804A	1992-02-18
JPS5739603A	1982-03-04
JPH01500790A	1989-03-16
US3162858A	1964-12-22

Other References: