WAVEGUIDE HORN ANTENNA, ANTENNA DEVICE, AND RADAR DEVICE

WIPO Patent Application WO/2006/080130

A1

A waveguide horn antenna comprising, formed on a conductor member (2), a feed waveguide (3) and a radiating waveguide (1) having a radiation direction perpendicular to the electromagnetic wave propagation direction of this feed waveguide (3). The radiating waveguide (1) comprises a horn type waveguide (12) consisting of a tapered waveguide opening to the outside from the conductor member (2) and having its sectional area gradually increasing toward the opening, and a logarithmic spiral waveguide (11) that connects the horn type waveguide (12) with the feed waveguide (3) and has a shape of extending in a 270æ rotation from the connection surface with the feed waveguide (3) up to the connection surface with the horn type waveguide (12) while surrounding the circumference of the feed waveguide (3). The logarithmic spiral waveguide (11) has its side wall formed in a logarithmic spiral shape when viewed from a plane direction perpendicular to the signal propagation direction of the feed waveguide (3) and is formed in a shape of linearly extending in the signal propagation direction of the feed waveguide (3).

JPS5994902	REFLECTION MIRROR TYPE ANTENNA
JPH05259729	HORN ANTENNA
JP2759900	CIRCULARLY POLARIZED WAVE AND LINEARLY POLARIZED WAVE CONVERTER UNIFIED WITH HORN

NAGAI TOMOHIRO (JP)

PCT/JP2005/021205

August 03, 2006

November 18, 2005

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MURATA MANUFACTURING CO (JP)
NAGAI TOMOHIRO (JP)

H01Q13/02; H01P1/02

JPS5433104B1	1979-10-18
JPS5515366Y2	1980-04-09
JPS5548564Y2	1980-11-13
JPS4630256B2
JP2004172688A	2004-06-17
JP2004112660A	2004-04-08
JPH0619202Y2	1994-05-18
JP2003163501A	2003-06-06
JP2001305214A	2001-10-31
JPH10303612A	1998-11-13
JPS5223743A	1977-02-22

Komori, Hisao (Noninbashi Chuo-k, Osaka-shi Osaka 11, JP)

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