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设计了一种新型小型化双频双圆极化微带天线。通过两个工作于主模的正方形贴片来实现双频双圆极化辐射,天线可工作在两个频点:1.616 GHz和2.495 GHz。在1.616 GHz频率辐射左旋圆极化波(LHCP),在2.495 GHz频率辐射右旋圆极化波(RHCP)。下层贴片开L型缝隙实现小型化,与普通的双频圆极化天线相比,其尺寸减小了21.65%,有效实现了小型化。天线采用同轴线单点馈电,且两层贴片之间未引入空气层,结构紧凑,便于加工。
A new miniaturized dual frequency dual circular polarization microstrip antenna was designed. Dual-band, double-circularly polarized radiation is achieved by two square patches working on the main mode, which operates at two frequencies: 1.616 GHz and 2.495 GHz. Left-handed circularly polarized (LHCP) radiation at a frequency of 1.616 GHz and right-handed circularly polarized (RHCP) radiation at a frequency of 2.495 GHz. The lower patch opens the L-shaped slot to achieve miniaturization. Compared with the common dual-frequency circularly polarized antenna, the size of the patch is reduced by 21.65%, which effectively realizes miniaturization. Antenna coaxial single-feed, and the introduction of two layers of air layer between the patch, compact, easy to process.