An annular dielectric resonator (DR) antenna (DRA) is implemented for THz applications. A silicon made DR is loaded with graphene disk for obtaining the tunability in the frequency response. The physical parameters of silicon annular DR can be set to obtain the resonance at any frequency in the lower THz band and can be tuned by changing the chemical potential of graphene nano-disk placed at the top of the DR. The response of antenna is preserved after changing the chemical potential of graphene. The higher order hybrid electromagnetic mode is excited in the antenna structure. The proposed research work provides a way to implement the antenna for THz frequency with high gain around 3.8 dBi and radiation efficiency in the range 72 − 75%.

环形介电共振器（DR）天线（DRA）用于THz应用。硅制DR装有石墨烯盘，以获得频率响应的可调性。可以设置硅环形DR的物理参数以获得较低THz频带中任何频率的谐振，并且可以通过更改放置在DR顶部的石墨烯纳米盘的化学势来进行调整。改变石墨烯的化学势后，天线的响应得以保留。高阶混合电磁模式在天线结构中被激发。拟议的研究工作为实现THz频率的天线提供了一种方法，该天线的增益约为3.8 dBi，辐射效率为72-75％。