Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1989-12-18
1990-11-27
Blum, Theodore M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342360, H01Q 322, H01Q 324, H01Q 326
Patent
active
049739719
ABSTRACT:
An apparatus and method for generating a directional beam for radiating or receiving electromagnetic signals having a constant beamwidth over a predetermined frequency range has been described incorporating a circular array antenna, a Butler matrix, a plurality of phase shifters, a plurality of transmission line lengths, and a power divider. The invention overcomes the problem of constant beamwidth over a predetermined frequency range such as one and one half octaves.
REFERENCES:
patent: 4316192 (1982-02-01), Acoraci
patent: 4414550 (1983-11-01), Tresselt
patent: 4641142 (1987-02-01), Greving et al.
patent: 4652879 (1987-03-01), Rudish et al.
Acoraci Joseph H.
Sinsky Allen I.
Wischhusen Carl B.
Allied-Signal Inc.
Blum Theodore M.
Massung Howard G.
Walsh Robert A.
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