Patent ID: 11962336
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. The active antenna system according to claim 15, wherein: N1 first level radio chain entities;
said first level radio chain entities of said at least two levels of radio chain entities being associated with a first frequency range encompassing at least one first level radio frequency band;
each of said first level radio chain entities having a respective first level radio transceiver arrangement being connected to a respective one of N1 antenna multiplexers;
each of said first level radio chain entities is comprised in one of N2 second level radio chain entities, whereby each second level radio chain entity comprises a set of at least one of said first level radio chain entities;
said second level radio chain entities being associated with a second frequency range encompassing at least one second level radio frequency band;
said second frequency range being situated at lower frequencies than said first frequency range;
each of said second level radio chain entities having a respective second level radio transceiver arrangement connected via second level splitter arrangements to N1/N2 respective antenna multiplexers of said N1 antenna multiplexers;
where N1 is an integer ≥4, N2 is an integer ≥2 and N1/N2 is an integer ≥2; and
wherein said number of combinations of said plurality of antenna subarrays and available polarizations thereof is equal to N1.