特定电磁环境下“北斗一号”系统与GPS组合接收机天线的设计与评估

Design and Evaluation of "BD-1" System & GPS Combined Receiver Antenna for Special Environment

针对"北斗一号"("BD-1")系统与GPS系统组合接收机在特定电磁环境下的需求,设计了一种组合接收机天线。该组合天线融合了四臂螺旋天线(FHA)与GPS微带天线的特点,并考虑了天线的空间结构。设计的组合天线具有良好的电磁兼容性,仿真结果表明该天线对于接收"北斗"和GPS信号都具有较好的圆极化轴比和增益方向图。研制的组合天线在微波暗室测试中和实际使用中都取得了较好结果。

In order to satisfy the need of ＂BD-1＂ system ＆ GPS combined receiver for special environment, a combined receiver antenna has been designed. The combined antenna integrates the characteristics of both the FHA（four helix antenna） and the micro-stripe antenna of GPS, the space structure of the antenna is improved and the antenna possesses good electromagnetic compatibility. The simulation indicated that the polarization axial ratio and antenna gain pattern of this antenna are good for ＂BD-1＂ signal and GPS signal. Besides, this combined antenna showed fairly good characteristic in the tests conducted in the microwave darkroom and in the practical application.