Metamaterial loaded star-shaped dielectric resonator antenna (SDRA) fed by aperture-coupled mechanism is used for the enhancement of bandwidth and gain. The star-shaped structure is made-up using biodegradable poly-lactic acid having a dielectric constant (ε_r) of 3.45 and loss tangent (tan δ) of 0.05, which adopt the cost-effective manufacturing i.e. additive manufacturing technique. The alteration in rectangular dielectric resonator antenna to make SDRA is the foundation for broad bandwidth while hybrid exciting-modes are due to feeding of two apertures (slots) of unequal length. Correspondingly, metamaterial i.e. an arrangement of the split-ring resonators have been used for gain enhancement of antenna. The enhanced peak gain of the metamaterial loaded SDRA is more than 12 dBi and the average radiating efficiency is ~ 81%. The proposed antenna attained a broad bandwidth of 41.1% ranging from 4.15 to 6.3 GHz which is suitable for the IEEE 802.11 WLAN standards and C-band wireless communications. The proposed antenna has also offer circularly polarized characteristics at 6 GHz. Thus such an antenna with a trait of circular polarization can be promising for other wireless applications.

通过孔径耦合机制馈入超材料负载的星形介电共振器天线（SDRA）用于提高带宽和增益。使用具有介电常数（_εr的可生物降解的聚乳酸）制成星形结构）为3.45，损耗角正切（tanδ）为0.05，这采用了具有成本效益的制造即增材制造技术。矩形介电谐振器天线的变化使SDRA成为宽带宽的基础，而混合激励模式是由于馈入了两个长度不等的孔（槽）。相应地，超材料，即开口环谐振器的布置已经用于天线的增益增强。负载超材料的SDRA的增强峰值增益大于12 dBi，平均辐射效率约为81％。拟议中的天线在4.15至6.3 GHz范围内获得了41.1％的宽带宽，适用于IEEE 802.11 WLAN标准和C波段无线通信。拟议的天线还具有6 GHz的圆极化特性。