Digital beam-forming network having a reduced complexity and array antenna comprising the same
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United States of America Patent
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Jan 23, 2018
Issued Date -
N/A
app pub date -
Dec 20, 2013
filing date -
Dec 20, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A digital beam-forming network for an array antenna having N>1 antenna ports, to be associated to respective antenna elements, and M≧1 beam ports (BP), corresponding to respective antenna beams. The digital beam-forming network comprises a plurality of complex weighting elements interconnected through summing nodes. At least one of the complex weighting elements is connected to either two antenna ports, to be associated with respective antenna elements which are arranged symmetrically with respect to the symmetry axis, or two beam ports corresponding to respective antenna beams pointing toward directions which are symmetrical with respect to the symmetry axis, or both. The digital beam forming network can be a part of an array antenna comprising N antenna elements, NS of which are arranged according to an array pattern having a symmetry axis, NS being an even integer different from zero.
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