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1. (WO2017190811) BEAM FORMING USING AN ANTENNA ARRANGEMENT

Pub. No.:    WO/2017/190811    International Application No.:    PCT/EP2016/075517
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Tue Oct 25 01:59:59 CEST 2016
IPC: H01Q 1/24
H01Q 3/26
H01Q 25/00
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: GIRNYK, Maksym
PETERSSON, Sven
Title: BEAM FORMING USING AN ANTENNA ARRANGEMENT
Abstract:
There are provided mechanisms for beam forming using an antenna array comprising dual polarized elements. A method comprises generating one or two beam ports. The one or two beam ports are defined by combining at least two non-overlapping subarrays. Each subarray has two subarray ports. The two subarray ports have identical power patterns and mutually orthogonal polarizations. The at least two non-overlapping subarrays are combined via expansion weight vectors or expansion weight arrays. The expansion weights and map the one or two beam ports to subarray ports such that the one or two beam ports have the same power pattern as the subarrays. At least some of the expansion weights have identical non-zero magnitude and are related in phase to form a transmission lobe. The method comprises transmitting signals using said one or two beam ports.