Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Reexamination Certificate
1999-07-16
2001-06-19
Le, Hoanganh (Department: 2821)
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
C343S818000, C343S835000
Reexamination Certificate
active
06249260
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to antennas of the T-Top type, particularly for achieving omni-directional horizontally-polarized operation.
BACKGROUND OF THE INVENTION
Both monopole and T-Top antennas have been used in aircraft for some time. T-Top antennas generate a radiation pattern of a natural elliptical shape and are limited in capacity for omni-directional horizontally-polarized operation.
SUMMARY OF EMBODIMENTS OF THE INVENTION
According to an embodiment of the invention, an antenna array in an elliptical T-Top section sits on a vertical blade support structure, and includes two bent dipole antenna elements which appear back to back on a printed circuit board with fully integrated micro-strip balun transformers.
According to an embodiment two very short director structures extending between opposite tips of opposite dipoles shape the radiation pattern and force it more circular from its more natural elliptical shape.
According to another embodiment, a Wilkinson divider drives the baluns 180 degrees out of phase. A single connector feeds the Wilkinson divider.
REFERENCES:
patent: 2700104 (1955-01-01), Bowman
patent: 2968038 (1961-01-01), Hauptschein
patent: 3604006 (1971-09-01), Rogers
patent: 3739390 (1973-06-01), Poppe, Jr. et al.
patent: 3945013 (1976-03-01), Brunner et al.
patent: 4008479 (1977-02-01), Smith
patent: 4072952 (1978-02-01), Demko
patent: 4083050 (1978-04-01), Hall
patent: 4084162 (1978-04-01), Dubost et al.
patent: 4160977 (1979-07-01), Davis
patent: 4329690 (1982-05-01), Parker
patent: 4331961 (1982-05-01), Davis
patent: 4392139 (1983-07-01), Aoyama et al.
patent: 4438437 (1984-03-01), Burgmyer
patent: 4573056 (1986-02-01), DuDome et al.
patent: 4635066 (1987-01-01), St. Clair et al.
patent: 4686536 (1987-08-01), Allcock
patent: 4825220 (1989-04-01), Edward et al.
patent: 4847626 (1989-07-01), Kahler et al.
patent: 4868577 (1989-09-01), Wingard
patent: 4870426 (1989-09-01), Lamberty et al.
patent: 5021799 (1991-06-01), Kobus et al.
patent: 5148183 (1992-09-01), Aldama
patent: 5191352 (1993-03-01), Branson
patent: 5198826 (1993-03-01), Ito
patent: 5272485 (1993-12-01), Mason et al.
patent: 5300936 (1994-04-01), Izadian
patent: 5313218 (1994-05-01), Busking
patent: 5489912 (1996-02-01), Holloway
patent: 5495260 (1996-02-01), Couture
patent: 5532708 (1996-07-01), Krenz et al.
patent: 5572226 (1996-11-01), Tuttle
patent: 5610620 (1997-03-01), Stites et al.
patent: 5614917 (1997-03-01), Kennedy et al.
patent: 5621420 (1997-04-01), Benson
patent: 5838285 (1998-11-01), Tay et al.
patent: 5892486 (1999-04-01), Cook et al.
patent: 5999141 (1999-12-01), Weldon
Comant Industries, Inc.
Le Hoang-anh
Stanger Lee
Tran Thuy Vinh
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