Design of a Wideband Spaceborne Stacked GNSS Antenna Featuring Chamfered-Serrated Conductive Walls and a Cross-Shaped Shorting Stub

This paper proposes an improved three-layer patch stacked antenna design to address the efficiency and gain sag issues of traditional stacked GNSS antennas in a wide frequency band. The design utilizes conductive walls with chamfered and serrated structures and cross shaped short-circuit branches, effectively suppressing the in band sag phenomenon. The simulation results show that the antenna operates within the full GNSS frequency range of 1.16-1.61GHz, S11<-13dB， The in band gain is flat, with peak gain>5.5dBiC and axial ratio<1dB. This design significantly improves broadband performance and adaptability to onboard environments, providing a practical solution for onboard navigation receivers.

本文提出一种改进型三层贴片堆叠天线（three-layer patch stacked antenna）设计，以解决传统堆叠式全球导航卫星系统（Global Navigation Satellite System, GNSS）天线在宽频带内存在的效率与增益凹陷问题。该设计采用带有倒角锯齿结构的导电壁与十字形短路枝节，可有效抑制带内凹陷现象。仿真结果表明，该天线工作于1.16~1.61GHz的全GNSS频段范围内，S11参数小于-13dB，带内增益平坦，峰值增益大于5.5dBi，轴比（axial ratio）小于1dB。本设计显著提升了宽带性能与对车载/机载平台环境的适配性，为车载导航接收机提供了切实可行的解决方案。