Abstract
With the rapid development of the semiconductor industry, our daily life is flooded with all kinds of wireless communication products which bring a lot of convenience to people. Power amplifiers (PA) are essential to equipment such as high-end smartphones, wireless sensing radar or satellite communication systems, etc. The energy of radio signals continuously attenuate when propagating through the atmosphere. If there is no PA in a wireless communication radio frequency (RF) frontend circuit, the purpose of wireless communication cannot be achieved. In this thesis, an S-band (2~5 GHz) and a V-band (57~63 GHz) class AB PA are proposed and implemented. The two frequency bands are chosen because they are located in industrial, scientific and medical (ISM) band, which can be used arbitrary without a license. Because of free of charge, the band is the research focus of many relevant units. The S-band PA is integrated in an ultra-wideband (UWB) impulse-radio (IR) radar system, which can accomplish contactless vital signs sensing such as heartbeat and breathing rate. The function will effectively promote the practicability and convenience of the medical care. On the other hand, the V-band PA a phase-locked loop (PLL) with the same band are combined into a complete wireless transmitter RF frontend. Frequencies around 60 GHz is easy to be absorbed by oxygen in air, so the band is suitable for short-range applications with high data-rate transmission. For example, integrate whole household electronic devices can be accessed or controlled from anywhere in a house by a man-machine interface.