A Cylindrical Dielectric Resonator antenna (CDRA) along with silicon based Rectangular Dielectric Resonator (RDR) slab is proposed in this paper for terahertz (THz) applications. This antenna provides multi-band response at different resonant frequencies. Unique feature of the proposed antenna is, it provides Circular Polarization (CP) behaviour at quad band in the field of THz dielectric resonator antennas and also CP tuning is achieved by varying graphene potential of the antenna. Furthermore this antenna shows both Right Hand CP (RHCP) and Left Hand CP (LHCP) behaviour at different resonant frequencies. A rectangular slab is incorporated with CDRA knows CPDRA to achieve CP response. Results show that a maximum gain of 6.67 dB, maximum radiation efficiency of 89%, 10 dB Impedance Bandwidth (IBW) of 4.66% (8.59-9THz), 2.98% (10.88–11.21THz), 4.83% (14.19–13.52THz) and 5.86% (15.88–16.84), Axial Ratio Bandwidth (ARBW) of 1.83% (8.66–8.82 THz), 2.16% (10.94–11.18), 3.84% (13.26–13.78 THz) and 4.8% (16.04–16.83 THz) is achieved by the combination of CDRA and Rectangular slab. For antenna tunability, the upper layer of CDRA is layered with graphene material and CP performance of antenna is analyzed for different values of graphene chemical potential. This new approach for the tuning and obtained results make the proposed Quad band CP DRA as unique and is suitable for THz applications.

本文提出了一种圆柱形介质谐振器天线 (CDRA) 和硅基矩形介质谐振器 (RDR) 板，用于太赫兹 (THz) 应用。该天线在不同的谐振频率下提供多频带响应。所提出的天线的独特之处在于，它在太赫兹介质谐振器天线领域中的四频段提供圆极化 (CP) 行为，并且通过改变天线的石墨烯电位来实现 CP 调谐。此外，该天线在不同谐振频率下显示右手 CP (RHCP) 和左手 CP (LHCP) 行为。矩形板与 CDRA 相结合，了解 CPDRA 以实现 CP 响应。结果表明，最大增益6.67 dB，最大辐射效率89%，10 dB阻抗带宽（IBW）4.66%（8.59-9THz），2.98%（10.88-11.21THz），4. 83% (14.19–13.52THz) 和 5.86% (15.88–16.84)，轴向比带宽 (ARBW) 1.83% (8.66–8.82 THz)，2.16% (10.94–11.18), (13.86%)– 3.87Hz 4.8% (16.04–16.83 THz) 是通过 CDRA 和矩形板的组合实现的。对于天线可调谐性，CDRA 的上层用石墨烯材料分层，并针对不同的石墨烯化学势值分析了天线的 CP 性能。这种用于调谐和获得结果的新方法使所提出的四频段 CP DRA 独一无二，适用于太赫兹应用。CDRA 的上层用石墨烯材料分层，并针对不同的石墨烯化学势值分析了天线的 CP 性能。这种用于调谐和获得结果的新方法使所提出的四频段 CP DRA 独一无二，适用于太赫兹应用。CDRA 的上层用石墨烯材料分层，并针对不同的石墨烯化学势值分析了天线的 CP 性能。这种用于调谐和获得结果的新方法使所提出的四频段 CP DRA 独一无二，适用于太赫兹应用。