  The concept and analysis of a Terahertz (THz) frequency-reconfigurable
antenna using graphene are presented. The antenna exploits dipole-like
plasmonic resonances that can be frequency-tuned on large range via the
electric field effect in a graphene stack. In addition to efficient dynamic
control, the proposed approach allows high miniaturization and good direct
matching with continuous wave THz sources. A qualitative model is used to
explain the excellent impedance stability under reconfiguration. These initial
results are very promising for future all-graphene THz transceivers and
sensors. Keywords: Reconfigurable antenna, Graphene, Plasmons, Terahertz,
frequency-tuning.
