Communications: radio wave antennas – Antennas – Wave guide type
Reexamination Certificate
2006-09-12
2009-11-24
Chen, Shih-Chao (Department: 2821)
Communications: radio wave antennas
Antennas
Wave guide type
C343S779000
Reexamination Certificate
active
07623084
ABSTRACT:
A feed assembly (26) for an antenna system (38) includes a first feed element (30) that propagates a first beam (32) and a second feed element (34) that propagates a second beam (36). The second feed element (34) is collocated with, but displaced vertically from, the first feed element (30) to achieve angular diversity in elevation. Each of the feed elements (30, 34) has an elongated conical shape and is formed from a dielectric material. The feed assembly (26) operates within the Ku-band frequency range to yield high gain, collimated, independent first and second beams (32, 36). The feed assembly (26) can be implemented in a tropospheric scatter communication system (38) in conjunction with a reflector (22) to provide concurrent transmit and receive capability via the two independent, angularly separated first and second beams (32, 36).
REFERENCES:
patent: 2956276 (1960-10-01), Friis
patent: 2956277 (1960-10-01), Crawford
patent: 4253193 (1981-02-01), Kennard et al.
patent: 4564935 (1986-01-01), Kaplan
patent: 4777491 (1988-10-01), Bassi et al.
patent: 4794400 (1988-12-01), Campora et al.
Chen Shih-Chao
General Dynamics C4 Systems, Inc.
Meschkow & Gresham PLC
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