A Fully Integrated CMOS Power Amplifier with a 133% Relative Bandwidth upon Multilayer Inductors

The quality factor of the inductor in the matching network, which is one of the keys to realize a broadband PA, needs to be decreased for expanding the bandwidth. The paper presents multilayer inductors, which have low quality factor and can tolerate large current, for expanding the bandwidth. The multilayer inductors (MIs) are used in a CMOS PA, which reaches a good performance in the measured 133% relative bandwidth.