Direct digital synthesizer driven phased array antenna

Details Direct digital synthesizer driven phased array antenna Direct digital synthesizer driven phased array antenna

1997-01-21

1998-06-09

Tarcza, Thomas H.

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

Directive

Including a steerable array

342 81, 342154, 342157, H01Q 324

Patent

active

057641870

ABSTRACT:
A digitally beam formed phased array antenna capable of both transmitting and receiving signals is constructed from a series of digitally controlled antenna elements. To transmit signals, a series of direct digital synthesizers is used to drive the antenna elements forming the phased array. Each direct digital synthesizer is programmed from a common digital processor with specific time and phase delay information such that the signals from the array combine to form a desired antenna pattern. To receive signals, signals from each antenna element in the phased array are processed by analog to digital converter. The digitized signals are then preprocessed in a time and phase delay preprocessor which receives time and phase delay information from a corresponding direct digital synthesizer prior to signal combining in a common digital processor. The digitally beam formed antenna, thus formed, allows for remote reconfiguration, flexible partitioning, and generation of multiple and independent beams from a single phased array.

REFERENCES:
patent: 4219811 (1980-08-01), Herman et al.
patent: 4996532 (1991-02-01), Kirimoto et al.
patent: 5500871 (1996-03-01), Kato et al.
patent: 5541607 (1996-07-01), Reinhardt
patent: 5640670 (1997-06-01), Samueli et al.
H. Steyskal, Digital Beamforming at Rome Laboratory, pp. 100-126, Microwave Journal , Feb. 1996.

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