Modified difference mode coaxial antenna with flared aperture

Details Modified difference mode coaxial antenna with flared aperture Modified difference mode coaxial antenna with flared aperture

1981-09-28

1984-04-17

Lieberman, Eli

Communications: radio wave antennas

Antennas

Wave guide type

343769, H01Q 1302

Patent

active

044438044

ABSTRACT:
A coaxial radiating waveguide antenna is disclosed, comprising two conductive concentric right circular cylinders forming a cavity. Equally spaced within the cavity is a set of probes phased in such a manner as to produce TE.sub.21 or a higher order difference mode of radiation. One side of the toroidal antenna is sealed by a flat conductive ring; the other side is generally open and terminates in two flared regions which serve to shape the beam in the desired fashion. A broad null surrounds the boresight axis with major lobes disposed approximately 45.degree. therefrom in the case of TE.sub.31 propagation. The resulting radiation can be circularly or linearly polarized.

REFERENCES:
patent: 3508277 (1970-04-01), Ware et al.
patent: 3581311 (1971-05-01), Kach
patent: 3665481 (1972-05-01), Low et al.
patent: 3739386 (1973-06-01), Jones, Jr.
patent: 3864687 (1975-02-01), Walters et al.
patent: 3918064 (1975-11-01), Gustincic
patent: 4041499 (1977-08-01), Liu et al.
patent: 4110751 (1978-08-01), Reggia et al.

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