中文摘要：

为了提高无线通信应用中THz天线的性能,在微波段双频偶极天线基础上设计适用于THz频段的双频偶极天线.该天线通过结合交叉电极结构来提高天线的激光耦合效率以及所能承受的激光功率,采用双层衬底材料来改善天线的电学辐射特性.仿真结果表明,以反射损耗和辐射阻抗等作为目标对天线的结构参数进行优化,当天线工作谐振频率点分别为0.2和0.65THz时天线的反射损耗均小于-25dB,且辐射阻抗达到局部极大值.对天线的结构参数研究表明,改变天线的电极间隙能够使天线工作在需要的高频谐振频率.

英文摘要：

A dual-frequency dipole antenna used within THz frequency band was presented based on that used within microwave band in order to improve the performance of THz antenna for wireless communications application.The structures of interdigitated electrode and dual-layer substrate were introduced to improve the coupling efficiency of irradiated light,the laser power that the antenna can sustain and the electrical radiation characteristics of the antenna,respectively.The simulation results demonstrate that,the return loss at two resonant frequencies of 0.2 THz and 0.65 THz are both lower than-25 dB through optimizing its structure parameters when adopting return loss and radiation resistance as the objectives.The radiation resistance is also local maximum.The research on its structure parameters also shows that the high working resonant frequency can be achieved by changing the electrode distance.