Abstract
Owing to the fascinating features of graphene material, graphene-based patch antennas have quickly attracted attentions in communication technologies for high-speed data transfer in terahertz band. Herein, we present in this chapter a careful study of a new ultra-wide band (UWB) graphene-based plasmonic terahertz (THz) antenna operating in the range of 7.4–8.4 THz, with a huge bandwidth of 1000 GHz. The resonant part of the antenna consists of a modified circular ring patch, designed on 2.4 µm-thick silicon laminate with a high permittivity of 11.9. The resonating frequencies and the antenna operation band can be controllable by adjusting the graphene layers’ chemical potential, where the desired UWB behavior is attained whit a chemical potential of 2 eV. The suggested antenna possesses a super compact geometry of 24 × 24 µm along with attractive radiation behavior in terms of gain (up to 5.5 dB) radiation efficiency (>97%). In addition, a high impedance matching is achieved which contributes in very low reflection coefficient of −53.5 dB. According to the outcomes realized, it can be inferred that the proffered THz antenna would be an excellent solution for various applications in terahertz regime, including the explosive detection, material characterization, homeland defense, security scanning, biomedical imagine, sensing, video rate imaging system and the upcoming short-range high-speed wireless indoor communications.
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