一种单层双频双圆极化微带天线的设计

A Single-Layer Dual-band Dual-circularly-polarized Microstrip Antenna

提出了一种新型的单层双频双圆极化天线单元及其阵列。天线单元由工作在低频的外部环形贴片和工作在高频的内部矩形贴片套叠构成。通过在两贴片上长宽比与切角的调节实现了低频左旋圆极化(LHCP)和高频右旋圆极化(RHCP)特性。为验证该方法的正确性,设计了一个工作在11.9 GHz/17.5 GHz的双频双圆极化单元,并在此基础上设计了一个4×4的双频双圆极化天线阵列。

A novel single-layer dual-band dual-circularly-polarized microstrip antenna element and array are proposed.The antenna element consists of an outside rectangular ring patch operating in lower band and an inside rectangular patch operating in high band.By optimizing the length-width ratio and perturbation segments of the antenna element,left-hand circularly polarization(LHCP) in lower band and right-hand circularly polarization(RHCP) in high band are achieved.To validate the design method,a dual-band dual-circularly-polarized antenna element operating at 11.9 GHz and 17.5 GHz is designed.Based on the element,a 4×4 dual-band dual-circularly-polarized antenna array is designed finally.