ABSTRACT
With the acquaintance of the characteristics of the electromagnetic wave at the millimeter wave (mm-wave) band and the development of fabrication technology, the applications at the mm-wave band attract people to develop standards and circuits. The 7 GHz ISM band around 60 GHz makes the multi gigabit-per-second (Gbps) communication possible. The high attenuation of 60 GHz electromagnetic waves in oxygen enables the cooperation of more links in the same area with minimal interference, which greatly enhances the utilization rates of the frequency band. And this characteristic also makes the communication channels more secure [1-3]. At the same time, the 77-79 GHz is a proper band to realize highly accurate automobile radar. These characteristics drive people to develop high-performance mmwave front end to realize these interactive applications. Among all, mm-wave power amplifiers in the front end have great influence on the performance of the system because the power amplifiers usually consume most of the power and occupy a large quantity of chip area. In the past years, power amplifiers were usually made with an
10.1 Introduction ..................................................................................................245 10.2 Challenge ......................................................................................................246
