Graphene FET for Microwave and Terahertz Applications

A graphene based FET can be used for a variety of applications. It can be utilized in the fascinating field of nano-scale device electronics or microwave and terahertz based guided wave components. In this chapter, a review of graphene field effect transistors has been presented in RF and bio-sensor circuits. It begins with an overview of the superior properties of graphene in graphene FETs, moving further to the characterization and fabrication challenges, and thereafter, their application in bioanalytical sensing and high frequency devices has been investigated. Graphene material has potential advantages in the form of low losses and power dissipation due to its high thermal, electrical conductivities and mobilities. It leads to better performance and efficiency relative to its silicon counterparts in various applications. It has some design and fabrication challenges owing to its high surface density and single atomic thickness. It also shows limitations in terms of bandgap variation, high fabrication costs and current saturation features.

Keywords: Biosensing, Detectors, Graphene, High frequency devices, Terahertz.