Multi-band antenna feed with switchably shared I/O port

Details Multi-band antenna feed with switchably shared I/O port Multi-band antenna feed with switchably shared I/O port

1994-12-15

1997-06-03

Lee, Benny T.

Communications: radio wave antennas

Antennas

Wave guide type

343786, 343785, 333135, 333106, 333108, H01Q 1300, H01P 1213

Patent

active

056359446

ABSTRACT:
A single integrated antenna feed transmits and receives electromagnetic waves in the C, X, and Ku frequency bands. This antenna feed includes an inner metal tube which lies along a central axis, and an outer metal tube which surrounds and is coaxial with the inner metal tube. Through the inner tube, a passageway is provided which is sized to carry electromagnetic waves in the X-band and Ku-band, but reject electromagnetic waves in the C-band. Between the inner tube and the outer tube, another passageway is provided which is sized to carry electromagnetic waves in the C-band. An I/O port for the X and Ku-bands is provided by a first end of the inner tube, and an I/O port for the C-band is provided by a corresponding first end of the outer tube. This first end of the outer tube lies proximate to but not past the first end of the inner tube. A solid dielectric is inserted into and fills the first end of the inner tube; and, a hollow metal cone is attached to the first end of the outer tube.

REFERENCES:
patent: 2629048 (1953-02-01), Dyke et al.
patent: 3500419 (1970-03-01), Leitner et al.
patent: 4319206 (1982-03-01), Schuegraf
patent: 4785306 (1988-11-01), Adams
patent: 5003321 (1991-03-01), Smith et al.
patent: 5109232 (1992-04-01), Monte

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