一种相位中心稳定的层叠双频导航天线设计

Design of dual-band stacked navigation antenna with stable phase center

摘要:

导航系统中，天线相位中心稳定性是高精确度导航定位的关键，为了达到这一技术要求，介绍了一种相位中心稳定度较高的层叠双频段圆极化导航天线。天线采用双层空气腔耦合天线结构，两馈电点馈电，可获得较宽的频带宽度和较高的相位中心稳定度。仿真和测量结果表明天线的相位中心稳定度小于1.72 mm，设计实用、可行。

Abstract:

The stability of antenna phase center is important for navigating and locating precisely in navigation system. To meet the technical requirements, a circularly polarized navigation antenna which is used in two frequency bands with high stability of phase center is designed. By using the structure of double air-box coupling antenna and feeding by two feed points，a wide frequency band and high phase center stability can be obtained. Both of the simulated results and the measured results show that the stability of phase center is less than 1.72 mm. The antenna is applicable and feasible.