Communications: directive radio wave systems and devices (e.g. – Directive – Including antenna pattern plotting
Reexamination Certificate
2007-10-04
2011-11-22
Liu, Harry (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including antenna pattern plotting
Reexamination Certificate
active
08063821
ABSTRACT:
A wide-angle null-fill antenna with no null in the depression angle range, an omni antenna using the same, and radio communication equipment. A null-fill antenna comprises a first antenna array including antenna elements arranged with a prescribed point as the center, and a second antenna array having amplitude characteristics substantially equal to those of the antenna elements forming the first antenna array. The first antenna array is excited so that the excitation amplitude distribution is to have symmetry with respect to the prescribed point, while the excitation phase distribution is to have point symmetry with respect to the prescribed point. The phase center of the first antenna array is substantially coincident with that of the second antenna array.
REFERENCES:
patent: 2898593 (1959-08-01), Ruze
patent: 3594811 (1971-07-01), Pierrot et al.
patent: 3877033 (1975-04-01), Unz
patent: 4090203 (1978-05-01), Duncan
patent: 4590480 (1986-05-01), Nikolayuk et al.
patent: H000137 (1986-10-01), Briggs et al.
patent: H000173 (1986-12-01), Claborn et al.
patent: 4819000 (1989-04-01), Meyer
patent: 5486838 (1996-01-01), Dienes
patent: 5638081 (1997-06-01), MacDonald et al.
patent: 5818385 (1998-10-01), Bartholomew
patent: 5973641 (1999-10-01), Smith et al.
patent: 6137448 (2000-10-01), Schadler
patent: 6311075 (2001-10-01), Bevan et al.
patent: 2002/0039381 (2002-04-01), Dooley et al.
patent: 2005/0003864 (2005-01-01), Elliot et al.
patent: 2005/0088358 (2005-04-01), Larry et al.
patent: 2006/0095206 (2006-05-01), Garin et al.
patent: 1 059 690 (2000-12-01), None
patent: 4-369104 (1992-12-01), None
patent: 6-291535 (1994-10-01), None
patent: 7-183724 (1995-07-01), None
patent: 8-146119 (1996-06-01), None
patent: H09-246859 (1997-09-01), None
patent: 9-304499 (1997-11-01), None
patent: 2001-211025 (2001-08-01), None
patent: 2001-320232 (2001-11-01), None
patent: 2005-506749 (2005-03-01), None
patent: WO 03/034547 (2003-04-01), None
patent: WO 2004/051796 (2004-06-01), None
European Search Report issued Oct. 19, 2005.
Dickstein & Shapiro LLP
Liu Harry
NEC Corporation
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