Improved Gain Graphene Based Leaky Wave Antenna Loaded by Dielectric Slab in THz Regime

A sinusoidally modulated graphene microstrip linebased leaky wave antenna that operates in the THz regime ispresented. The dispersion diagram of the unit cell of the antennais obtained by numerical simulation with commercial software.As a second step, the radiation pattern of the designed leakywave antenna is calculated: the main beam angle scans withthe operating frequency according to the dispersion diagram. Toincrease the gain, the antenna is loaded with a dielectric slab ontop of it acting as a partially reflecting surface. By optimizing theheight and distance of the slab, increase in the gain is achievedas it is demonstrated by numerical simulations.