A vector modulator is a very versatile device that can be used to adjust the amplitude and phase of a RF signal. i.e it combines the functions of phase shift and attenuator. A vector modulator is a key component in 5G networks and can be used as a beamformer. It can be used in generating complex signals such as QPSK and QAM. It is also used in digital predistortion networks for RF power amplifiers. Please visit the Signal Processing Group Inc website for more technical information and articles.