Title:
ANTENNA
Document Type and Number:
WIPO Patent Application WO/2013/150996
Kind Code:
A1
Abstract:
[Problem] To provide an antenna having a compact structure without reducing antenna properties. [Solution] An antenna (10) is provided with a waveguide (14) for supplying power, a sub-reflector (12), and a main reflector (11). The waveguide (14) for supplying power transmits electromagnetic waves comprising vertically polarized waves and horizontally polarized waves. The sub-reflector (12) is arranged so as to face an opening in the waveguide (14) for supplying power, and reflects the electromagnetic waves radiated from the opening. The main reflector (11) is arranged to as to face the sub-reflector (12), and radiates, to the exterior, electromagnetic waves that have been reflected by the sub-reflector (12). The surface of the main reflector (11) is a shape wherein a line that passes through the one side and the other side of a prescribed emission line at least once each circles the rotational axis. The surface of the sub-reflector (12) has a shape wherein a stepped or wave shaped line circles the rotational axis.
Inventors:
YANO KOHJI (JP)
Application Number:
PCT/JP2013/059845
Publication Date:
October 10, 2013
Filing Date:
April 01, 2013
Export Citation:
Assignee:
FURUNO ELECTRIC CO (JP)
International Classes:
H01Q19/19; H01Q15/14; H01Q19/13; H01Q21/24
Domestic Patent References:
| WO2005018049A1 | 2005-02-24 |
Foreign References:
| JPH05275920A | 1993-10-22 | |||
| JPH0888512A | 1996-04-02 | |||
| JPH09199924A | 1997-07-31 | |||
| JP2002198730A | 2002-07-12 | |||
| JPH0248804A | 1990-02-19 | |||
| JPH05152835A | 1993-06-18 | |||
| JP2011239281A | 2011-11-24 | |||
| JPH0628818Y2 | 1994-08-03 | |||
| JPH1127036A | 1999-01-29 |
Other References:
See also references of EP 2835868A4
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