ABSTRACT
This chapter focuses on how the development of SiGe HBT technology fits into the overall picture of semiconductor technologies with potential for high-speed/high-frequency applications. Circuits operating at mm-wave frequencies have traditionally been implemented in III–V semiconductors due to the higher mobility in these materials. Applications of mm-wave and THz frequencies led by the silicon integrated technologies can be subdivided into communication, radar, imaging, and sensing areas. The chapter describes some of these applications and the recent, state-of-the-art hardware developments in the corresponding areas as it relates to DOTSEVEN. Three-dimensional THz imaging based on the principle of computed tomography (THz-CT) is one of the emerging applications that may be explored in commercial imaging and sensing applications. THz-CT offers volumetric object reconstruction with an image contrast based on the characteristic THz absorption of the illuminated material.
