Patent ID: 11894615

Abstract:
A control system is presented for controlling operation of a phased-array antenna comprising N antenna elements each comprising H and V polarization terminals. The control system includes: an analogue circular polarization system (ACTS) and a digital polarization control system (DPCS). The ACPS comprises an array of N analogue circular polarization circuits (ACPCs) associated with said N antenna elements, respectively, such that each ACPC is connectable to the V and H polarization terminals of the respective antenna element. The ACPS is configured and operable with N analog circular polarization signal components each being either left or right circular polarization signal. The DPCS comprises: an array of N convertors associated with said N ACPCs, respectively, for converting between the N analog circular polarization (ACP) signals and N respective digital circular polarization (DCP) signals, such that each antenna element is associated with a respective single one of said N convertors; an array of N digital polarization controlled beamformers (DPCBs) connectable to said N convertors; and a plurality of digital signal splitters and/or combiners. Each DPCB comprises at least two beam forming channels associated with at least two, first and second, respective beams of different beam directions and/or different polarizations being operated by the antenna element, and is configured and operable to apply phase shifting to the respective DCP signal based on data indicative of a beaming direction (α) of a respective beam to be operated and the left or right polarization of circular polarization signal, and a relative phase (Φ) associated with the beaming direction (α) and a location of the respective antenna element in the array, to thereby form at leasttwo phase shifted signals corresponding to said at least two, first and second, respective beams. Digital signal splitters and/or combiners operate to separately combine the phase shifted signals corresponding to respectively the at least first and second beams, wherein at least two convertors of said N convertors are connected to a respective one of the signal splitters and/or combiners, and wherein each digital splitter and/or combiner, connected to the at least two converters, converts between the DCP signals of opposite left and right circular polarizations of the at least two convertors and V and H linear polarization components and splits and/or combines the opposite left and right circular polarization signals of the at least two convertors.