一种四频段多L型缝隙天线研究与设计

设计了一款共面波导馈电的多L型缝隙天线.通过在一个三角形辐射贴片上开L形缝隙实现多频的性能, 优化调整L形缝隙的大小以及相关参数可以灵活控制其每个频段的带宽.该天线具有多频带、小型化等特性, 通过共面波导馈电和采用高介电常数基板的方法降低了天线的谐振频率, 使得天线可以工作在更低频段.通过电磁仿真软件HFSS13.0对天线性能进行大量仿真实验与计算, 该天线在回波损耗小于-10 dB以下时, 其工作频段为1.254~1.276 GHz、1.537~1.623 GHz、1.804~1.845 GHz、2.097~3 GHz.该天线的结构简单、易于加工实现, 能够满足GPS、第三代第四代移动终端内置天线的小型化和多频段的要求.

Design and implementation of a four-band microstrip antenna with multi-L-shaped slots fed by coplanar waveguide

A four-band microstrip antenna fed by coplanar wave-guide(CPW) with multi-L-shaped slots was designed. The performance of the multiple frequency was obtained by carving L-shaped slot on a radiation triangular patch, and by adjusting the L-shaped slots and relative parameters, its bandwidth of each frequency band can be controlled flexibly. The proposed antenna has the features of multi-bands and miniaturization. By using coplanar waveguide feed and adopting the method of high dielectric constant substrate, the resonance frequency of the antenna can be reduced so that the antenna can work at lower frequency. A large number of simulations and calculations by using HFSS13.0 software have been done, and the simulation results show that the antenna can work at 1.254~1.276 GHz, 1.537~1.623 GHz/1.804-1.845 GHz and 2.097~3 GHz when the return loss was less than -10 dB. Simple structure, easy processing and implementation of the antenna are able to meet the requirements of the built-in GPS, the mobile terminal antenna of the third generation, the fourth generation, and their miniaturization and multiband requirements.