Beam forming network for butler matrix fed circular array

Communications: radio wave antennas – Antennas – Balanced doublet - centerfed

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Details

343854, G01S 114, H01Q 336, H01Q 340

Patent

active

043161928

ABSTRACT:
A circular multimode antenna array having N radiating elements, an NXN Butler matrix and N-1 phase shifters includes feed networks comprising a back fill-in network, a sum pattern power divider network, a difference pattern power divider network and a sum-difference combiner network. The various networks are used either alone or in simultaneous combination to provide sum and difference circular antenna patterns having omnidirectional side lobes.

REFERENCES:
patent: 3797019 (1974-03-01), Shestag et al.
patent: 3999182 (1976-12-01), Moeller et al.
patent: 4163974 (1979-08-01), Profera

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