Communications: radio wave antennas – Antennas – Balanced doublet - centerfed
Patent
1978-08-14
1980-08-12
Tubbesing, T. H.
Communications: radio wave antennas
Antennas
Balanced doublet - centerfed
343854, H01Q 326
Patent
active
042175879
ABSTRACT:
An electronically scanned phased array antenna system comprises a phase shift controller corresponding to each antenna array element for individually computing a phase shift value which governs the phase of the signal associated with the corresponding antenna element. The computed phase shift values of all the phase shift controllers effect a phased array on the signals of the antenna elements to point the antenna beam in a desired direction. Each of the phase shift controllers is programmed with a predetermined phase shift value increment for computing a sequence of phase shift values at specified intervals of a predetermined time pattern, each new phase shift value being preferably concurrently computed by the phase shift controllers at the specified time intervals. The phased arrays resulting from each of the newly-computed phase shift values of the sequence render the antenna beam to be scanned in a corresponding sequence of desired directions according to the specified intervals, which may be non-uniformly spaced, in the predetermined time patterns. Each predetermined phase shift value increment correspondly programmed into each phase shift controller may be based on a function of the geometric position of the correspondingly associated antenna element in the antenna array.
REFERENCES:
patent: 3454945 (1969-07-01), Hyltin
patent: 3484785 (1969-12-01), Sheldon et al.
patent: 3737899 (1973-06-01), Georgopoulos
patent: 3964065 (1976-06-01), Roberts et al.
patent: 4034374 (1977-07-01), Kruger
Tubbesing T. H.
Westinghouse Electric Corp.
Zitelli W. E.
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