一种耦合馈电的毫米波双频微带天线

Millimeter-Wave Dual-Band Microstrip Antenna Fed by Electromagnetic Coupling

提出了一种工作在45GHz与60GHz的耦合馈电双频微带天线。根据传统的矩形微带天线设计公式确定了普通矩形微带天线的结构及其参数,在此基础上,在接地板上开圆形槽,并在辐射贴片上加载矩形寄生贴片,实现了天线的双频工作。以耦合馈电方式拓展了带宽,并在表面电流密集程度较高的地方加载矩形缝隙进一步增加了带宽。该款天线可以同时在45GHz(36.2~48GHz)和60GHz(55.5~66.1GHz)的频段下工作,相对带宽分别达到了28%和17.4%,最大增益达到了6.0dB和6.9dB。该双频天线结构相对简单,各项性能指标稳定,具有一定的应用价值。

A dual-band microstrip antenna operating at 45 GHz and 60 GHz is proposed. Firstly, the structure and parameters of a common rectangular microstrip antenna are determined in accordance with the traditional rectangular microstrip antenna design formula. On this basis, a circular groove is slotted on the grounding plate, and a rectangular parasitic patch is loaded on the radiation patch, thus to realize the dual-band millimeter-wave antenna. The bandwidth is broadened by the coupling feed method, and the rectangular slots are loaded in a place where the surface current density is high, this further increases the bandwidth. The antenna can operate at 45 GHz (36.2.48 GHz) and 60 GHz (55.5~66.1 GHz) bands, with relative bandwidths of 28% and 17.4%, respectively, and maximum gains of 6.0 dB and 6.9 dB. The dual-band antenna has relatively simple structure and stable performance indicators, which is of certain application value.