一种紧凑结构的宽频带圆极化微带天线

为了解决层叠结构微带天线剖面高、结构复杂的问题,首次将支节匹配技术用于层叠结构的微带天线中,实现了更佳的阻抗匹配,且降低了天线高度,并将馈电网络与激励贴片做于同一层,使得天线结构简单紧凑.所设计天线的高度为0.053λ,比传统的层叠结构微带天线降低了近50％,同时实现了29.2％的阻抗带宽、32.3％的3 dB轴比带宽...

Broadband circularly polarized microstrip antenna with compact configuration

To solve the problems of the stacked microstrip antennas that have high profile and complicated structure, the first time stub tuning matching technique was used in the stacked microstrip antenna, a better impedance bandwidth realized and the height of the antenna reduced. And the feeding network and the driven patch were designed on the same substrate to achieve simple structure. The antenna has a height of 0.053λ which has been reduced by 50% compared with the general stacked microstrip antenna, achieving a impedance bandwidth of 29.2%, a 3dB axial ratio bandwidth of 32.2%, and a 1dB gain bandwidth of 11.3%. The corresponding antenna was fabricated. The results indicate that the antenna has compact configuration, broad bandwidth and high gain. What's more, the ground plane has enough space for the phase shifting network, enabling the proposed antenna to enjoy good advantage in the phased array application.