ABSTRACT
The millimeter-wave range usually starts at 30 GHz and ends at 300 GHz entering the sub-millimeter-
wave range. Below 100 GHz there are many possible applications of wireless communication systems,
radars, and navigation systems, which are handicapped by the high costs of the front-end electronics.
Beyond 100 GHz the applications are still explorative. A major breakthrough is expected for all these
applications, if low-cost silicon technologies can serve the markets. Currently, the silicon-germanium
HBT technology is the most promising approach to fulfill the requirements. The design, the state-of-the-
art performance, and some technological aspects of analog silicon-based millimeter-wave integrated
circuits using mostly HBT technologies are discussed in this chapter.
