PHASE SHIFTER DEVICE INCLUDING MEMS SWITCHES AND DELAY LINES AND PORTABLE COMMUNICATION DEVICE USING THE SAME

摘要

A phase shifter device (1) for a portable communication device, said phase shifter device (1) comprising: a first in-port (22) for an incoming RF signal, and a second out-port (24) for an outgoing RF signal; a phase switch device (20) including a plurality micro-electro-mechanical (MEM) switches (40) controllable by a control unit (30), said phase switch device (20) being arranged to select one of a plurality of phase shift values corresponding to a switchable time delay line having corresponding different selectable lengths, provided by the phase switch device (20) to the incoming RF signal.