Antenna system for producing variable-size beams

Details Antenna system for producing variable-size beams Antenna system for producing variable-size beams

2008-01-01

2008-01-01

Tarcza, Thomas H. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S354000, C342S372000, C342S374000, C342S379000, C455S562100

Reexamination Certificate

active

07315279

ABSTRACT:
An antenna system has multiple antenna feed elements combined in a number of element sets independently controlled to provide a beam of a variable size. Multiple input power dividers are provided for dividing an input signal, and multiple phase controllers are respectively connected to outputs of the power dividers for producing a plurality of phase-shifted signals having prescribed phases. The phase-shifted signals are supplied to respective inputs of a hybrid matrix. Predetermined outputs of the hybrid matrix are connected to summation circuitry for providing in-phase power summation of signals produced at these outputs. The antenna elements in at least one of the element sets are controlled by a sum signal produced by the summation circuitry. The other element sets may be controlled by respective output signals of the hybrid matrix.

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