Abstract
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.