一种新型环状宽带圆极化微带天线设计

本文设计了一种新型的环状开缝的宽带圆极化微带贴片天线,通过等幅度90°相位差的L型探针馈电。通过在环状贴片上开槽可以有效的增加轴比和阻抗带宽。传统的圆极化天线带宽受限于阻抗、轴比和增益的公共带宽,本文提出的天线得到有效带宽从1.1GHz到1.9GHz,相对带宽达到了53%以上,频带覆盖了GPS、GALILEO、COMPASS、GLONASS四大导航系统。该天线性能较好,加工调试简便,在卫星导航等领域具有广阔的应用前景。

Design of New Annular Circular Polarization Broadband Microstrip Antenna

A new circular polarization (CP) broadband microstrip antenna with annular slot in the patch is designed in this paper, which is fed by the L-probe with its phase difference is 90°. Through slotting in the annular patch, the axial ratio and impedance bandwidth are effective increased. The bandwidth of traditional circular polarization is limited by the common bandwidth of impedance, axial ratio and gain. The relative bandwidth of proposed antenna is up to over 53%, with its effective bandwidth is 1.1GHz to 1.9GHz. The frequency band covers four navigation systems of GPS, GALILEO, COMPASS and GLONASS. The proposed antenna can be easily debugged with low cost and widely used in Global Satellite Navigation System.