An extremely low loss circle-based star shape photonic crystal fiber (CS-PCF) has been proposed for terahertz (THz) spectrum. A dielectric material TOPAS has been used for constructing the proposed model. Some important parameters for the proposed waveguide have been investigated a wide THz spectrum ranging from 0.5 to 2.50 THz. The simulation result exhibits an extremely-low material loss of 0.01607 cm⁻¹ and a large effective area of 1.386 $\times$ 10⁶ $\mathrm{\mu }$m² at 1.0 THz frequency with 55% core porosity. In addition, the proposed structure establishes comparatively higher core power fraction maintaining lower scattering loss about 1.235 $\times$ 10⁻¹⁵ dB/cm and 91.97% of bulk absorption material loss at the same operating frequency. From the above results, it is anticipated that proposed CS-PCF model of the THz waveguide will make the conventional communication very effective over the current designs.

对于太赫兹（THz）光谱，已经提出了一种极低损耗的基于圆形的星形光子晶体光纤（CS-PCF）。电介质材料TOPAS已用于构建建议的模型。已对拟议的波导的一些重要参数进行了研究，研究范围为0.5至2.50 THz的宽THz频谱。仿真结果显示出0.01607 cm ^-1的极低材料损耗和1.386的大有效面积$\times$10 ⁶ $\mathrm{\mu }$m ²在1.0 THz频率下具有55％的孔隙率。另外，提出的结构建立了相对较高的核心功率分数，并保持较低的散射损耗（约1.235）$\times$ 在相同的工作频率下，损耗为10 ^-15 dB / cm，占整体吸收材料损耗的91.97％。从以上结果可以预期，提出的太赫兹波导的CS-PCF模型将使常规通信在当前设计上非常有效。