With the recent advancement in high-frequency microwave devices and applications, graphene-based antennas are showing real potential due to the unique properties of graphene material and its ability to operate at terahertz communication band (0.1 THz–10 THz). Herein, a very high-gain and ultrawide-band graphene-based patch antenna is proposed with the application of photonic crystal and dielectric grating. The designed antenna possesses a −10 dB impedance bandwidth of 9.552 THz with −10 dB operation from 0.448 THz to 10 THz, which is equivalent to 96.48 % of the complete terahertz communication band. Along with the ultrawide-band property, the antenna possesses a maximum gain of 21.22 dB and a maximum radiation efficiency of 93.23 %. The designed antenna is also analyzed for different periodicity, dimensions, and shapes of the photonic crystal. Where, the periodicity and dimensions of photonic crystal influence the antenna performance, the shape of the photonic crystal has little to no effect.

随着高频微波设备和应用的最新发展，基于石墨烯的天线由于石墨烯材料的独特性能及其在太赫兹通信频段（0.1 THz-10 THz）下工作的能力而显示出了巨大的潜力。在此，结合光子晶体和介电光栅，提出了一种高增益，超宽带的基于石墨烯的贴片天线。设计的天线具有9.552 THz的−10 dB阻抗带宽，在0.448 THz至10 THz的-10 dB工作频率下，相当于整个太赫兹通信频段的96.48％。天线具有超宽带特性，最大增益为21.22 dB，最大辐射效率为93.23％。还分析了所设计的天线的光子晶体的不同周期性，尺寸和形状。