using two or more spaced independent antennas

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Radio transmission systems, i.e. using radiation field > Diversity systems; Multi-antenna systems, i.e. transmission or reception using multiple antennas > using two or more spaced independent antennas

CPC:

Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) > Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas (RAKE receivers H04B1/7115) > using two or more spaced independent antennas

Of 7 combined children, 6 exist in both systems.

1 codes are CPC-only extensions.

Child Classifications

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H04B 7/04013 +1 CPC CPC only CPC only
H04B 7/0404 the mobile station comprising multiple antennas, e.g. to provide uplink diversity since 2017 IPC+CPC Available in IPC and CPC
H04B 7/0408 using two or more beams, i.e. beam diversity since 2017 IPC+CPC Available in IPC and CPC
H04B 7/0413 MIMO systems since 2017 IPC+CPC Available in IPC and CPC
H04B 7/0491 using two or more sectors, i.e. sector diversity since 2017 IPC+CPC Available in IPC and CPC
H04B 7/06 at the transmitting station +4 CPC IPC+CPC Available in IPC and CPC
H04B 7/08 at the receiving station +5 CPC IPC+CPC Available in IPC and CPC