一种宽带圆极化微带阵列天线设计

Design of Broadband Circularly Polarized Microstrip Array Antenna

设计了一种用于S频段卫星通信的宽带圆极化微带阵列天线。天线单元采用双层圆形微带贴片结构,使用双点同轴馈电和带状线结构的圆极化,天线阵列按2×4的矩形结构组阵。仿真结果表明,设计的天线增益不小于15 dBi,轴比小于2.5 dB,驻波小于1.2。该天线不仅频带宽、增益高、轴比低,而且具有轻便、易集成等特点。

A broadband circularly polarized microstrip array antenna for s-band satellite communication is designed.The antenna unit adopts the structure of double-layer circular microstrip patch,uses twopoint coaxial feed and circular polarization of stripline structure,and the antenna array is composed of 2×4 rectangular structure.Simulation results indicate that the designed antenna gain is not less than 15 dBi,the axial ratio less than 2.5dB and the VSWR(voltage standing wave ratio)less than 1.2.The antenna not only has wide frequency band,high gain and low axial ratio,but also has the characteristics of portability and easy integration.