Patent ID: 8050639

Claim:
A multi-antenna communication apparatus comprising a multi-antenna receiver for simultaneously receiving signals using a plurality of antennas, the multi-antenna communication apparatus comprising: N antennas; N switches operable to receive signals from the N antennas, respectively; a switch control circuit operable to repeatedly control the N switches so as to be ON, one by one, for a predetermined time period in a predetermined sequence, the switch control circuit including a reducing means for reducing a difference between any two voltage waveforms output from any two consecutive switches of the N switches; a signal shaping section operable to receive, as serial signals, reception signals outputted by the N switches in accordance with a control performed by the switch control circuit, and shape the serial signals; an AD converter operable to analog-to-digital convert, in synchronization with a time at which the switch control circuit performs the control, the serial signals having been shaped by the signal shaping section; and a serial-to-parallel conversion section operable to convert, into parallel signals, the serial signals having been digitalized by the AD converter, so as to generate, in the predetermined sequence, N signals corresponding to the N antennas.