Materials science

Telecommunications

Computer science

Antenna (radio)

Physics

Microstrip

Dielectric

Optics

Terahertz radiation

Resonator

Circular polarization

Dielectric resonator antenna

Optoelectronics

Axial ratio

Optik

A circularly polarized (CP) dielectric resonator (DR) antenna (DRA) is implemented and numerically analyzed for terahertz (THz) applications. A composite of different deformed geometries silicon based DRs is utilized for obtaining the orthogonal modes required for achieving the CP response in THz frequency range. A rectangular slab of silicon is kept at the top of the annular circular silicon DR rotated at around 45° for generating the orthogonal degenerate modes. The proposed THz CPDRA provides the 4.67%(3.97-4.16) axial ratio and 3.72%3.95-4.1THz impedance bandwidth. The top surface of annular DR is coated by the graphene material for obtaining the tunability in frequency response of antenna. In addition, the proposed antenna provides high gain and radiation efficiency in the THz frequencies.

Tunable terahertz circularly polarized dielectric resonator antenna