Reconfigurable multifunctional graphene-based antenna for cancer therapy with THz wave ablation

In this article, a multifunctional THz antenna with reconfigurable frequency, polarization, and radiation pattern has been presented for use in cancer therapy. The antenna has been designed over a silicon dioxide (SiO2) substrate in which the E-shaped parasitic element is used symmetrically to control the current distribution, which determines the frequency range. The multilayer structure, non-radiating graphene ring, and graphene loads have been used for multifunctional reconfigurability. The graphene loads have been used for the creation of an electrostatic field effect by switching between metal and graphene on the main patch. In addition, the antenna performance parameters with increased Q factor have been strengthened by controlling the surface current of the antenna with graphene loads. The final antenna is 122.5% bandwidth in the range of 1.2-5 THz, and multi-polarization which is linear, circular, and elliptic polarization. The final antenna gain is increased up to 20.1 dBi, making it more attractive for therapy. Since radiation pattern orientation, high bandwidth, and circular polarization affect the treatment success rate in cancer treatment, a solution has been produced with an antenna with multifunctional reconfigurable properties. This antenna is aimed to be used in the treatment of cancerous tissue in the THz spectrum.