專利摘要：
A vector modulator includes a quadrature component generator (12), configured to generate an input in-phase signal (I i) and an input quadrature signal (Qi) according to an input radio frequency (RF) signal (RFin); a switching circuit (14), receiving a plurality of bits (B1,...,BN), comprising a plurality of switches controlled by the plurality of bits, configured to generate an output in-phase signal (Io) and an output quadrature signal (Qo) according to the plurality of bits (B1,...,BN), where the output in-phase signal (Io) and the output quadrature signal (Qo) are related to input in-phase signal (Ii) and the input quadrature signal (Qi); and a combining module (16), configured to generate an output RF signal (RFout) according to the output in-phase signal (Io) and the output quadrature signal (Qo).