Patent ID: 11923878
Assignee: FUJITSU LIMITED
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A wireless device comprising a plurality of antenna elements and plurality of wireless signal processing circuits provided in respective correspondence with the plurality of antenna elements,
each of the plurality of wireless signal processing circuits comprising:
a plurality of phase switchers provided on each of plurality of paths along which an in-phase signal is distributed and each of plurality of paths along which a quadrature signal is distributed, the in-phase signal being in phase with a transmission signal and the quadrature signal being rotated 90° in phase from the transmission signal, each phase switcher switching a phase rotation amount of the one of the in-phase signal and the quadrature signal that is distributed along the corresponding path selectively in accordance with a transmission direction of the transmission signal, and the phase switcher rotating the phase of the signal;
a plurality of variable amplifiers provided in respective correspondence with the plurality of phase switchers, each variable amplifier altering an amplitude of one of an input signal or an output signal of the corresponding phase switcher in accordance with the transmission direction of the transmission signal;
a plurality of mixers provided in respective correspondence with the plurality of phase switchers and the plurality of variable amplifiers, each mixer up-converting a frequency of the signal processed by the corresponding phase switcher and variable amplifier; and
a combination section that combines outputs from the plurality of mixers corresponding to different ones of the plurality phase switchers and outputs a common signal corresponding to one antenna element of a plurality of antenna elements.