基于3D打印技术的宽带圆形微带天线

该文介绍了一款环形耦合的圆形贴片天线。采用圆形金属贴片作为天线的辐射贴片，通过在介质板上引入两个谐振环，产生两个新的工作谐振频段。通过调节圆形贴片和耦合环之间的高度，进一步拓宽了天线的工作频段。通过3D打印技术对不规则的介质基板进行加工制作，有效解决了传统加工方法加工难度大及生产周期长的问题。测试结果表明，该天线在3.8～5.8 GHz工作频段内，回波损耗小于-10 dB;在5.1 GHz时，天线增益达到8.4 dBi;天线相对带宽为42%,且具有良好的全向辐射特性。天线的测试结果与仿真结果基本吻合。

Broadband Circular Microstrip Antenna Based on 3D Printing Technology

A circular patch antenna with annular coupling is proposed in this paper. Using the circular metal patch as the radiation patch of the antenna, two new resonant bands are generated by introducing two resonant rings onto the dielectric plate. By adjusting the height between the circular patch and the coupling ring, the operating frequency band of the antenna is further broadened. The irregular dielectric substrate is processed by 3D printing technology, which effectually solves the problems of difficult processing and long production cycle of traditional processing methods. The measured results show that the return loss is less than 10 dB in the operating frequency band of 3.8~5.8 GHz. At 5.1 GHz, the antenna gain reaches 8.4 dBi. The relative bandwidth of the antenna is 42%, and it has good omnidirectional radiation characteristics. The measured results are in good consistent with the simulation ones.