Communications: radio wave antennas – Antennas – Slot type
Patent
1991-06-07
1992-01-07
Wimer, Michael C.
Communications: radio wave antennas
Antennas
Slot type
343770, 333113, 333114, H01Q 1310
Patent
active
050795619
ABSTRACT:
An array antenna which includes a first waveguide 12 coupled to a second waveguide 20 by an L-shaped coupling slot 30. The slot 30 has a first portion 32 orthogonal to a second portion 34 thereof thereby providing the unique L-shape. In a specific embodiment, the slot 30 is located with the first portion 32 along the centerline and longitudinal axis of the first waveguide 12 and the second portion 34 along the centerline and longitudinal axis of the second waveguide 20. The folded short, as well as the tapered section of prior designs can be eliminated by use of the L-shaped coupling slot of the present invention in the first and last positions of the coupling slot because a short can be placed at the L-shaped slot. Hence, the L-shaped coupling slot of the present invention provides a more compact planar antenna than that afforded by conventional designs.
REFERENCES:
patent: 2473274 (1949-06-01), Bradley
patent: 2573746 (1951-11-01), Watson et al.
patent: 2993181 (1961-07-01), Friedman et al.
patent: 3230483 (1966-01-01), Kinsey
patent: 3281851 (1966-10-01), Goebels, Jr.
patent: 3537037 (1970-10-01), Brumbaugh
patent: 3720953 (1973-03-01), Ajioka
patent: 4303898 (1981-12-01), Kinsey et al.
Brown C. D.
Denson-Low W. K.
Heald R. M.
Hughes Aircraft Company
Le Hoang-anh
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