一体化GPS磁窗天线的设计与实验研究

设计了一种用于减缓高超声速飞行器通信中断的、中心频率为1.575GHz、一体化GPS磁窗天线,并开展了静态验证实验。设计的磁窗天线由贴片微带天线和永磁体一体化组成,结构尺寸为100mm×100mm×75mm,并设计了防护结构。磁窗天线的贴片微带天线不会对永磁体磁场产生影响,而永磁体也不会改变贴片微带天线谐振频率;设计的磁场防护装置对天线轴向的磁场强度没有减弱,对非传播方向完全屏蔽,起到了保护作用。针对厚度为25.5mm、电子密度为6×1010~1×1011 cm-3的等离子体,设计的磁窗天线能将1.575GHz电磁波透射系数从-19~-23.5dB提高到-11~-16dB。研究结果表明:设计的一体化GPS磁窗天线能够一定程度减缓电子密度为6×1010~1×1011cm-3的等离子体对1.575GHz电磁波通信影响,且实现了磁窗天线的小型化,并提高了安全性。

Design and experimental research of an integrated GPS magneto window antenna

A 1.575 GHz integrated GPS magneto window antenna which aimed to reduce communication interruption of hypersonic aerial vehicle was designed, and a static verification experiment was done. The designed magneto window antenna was composed of a microstrip antenna and a permanent magnet. Its size was 100 mm100 mm75 mm, and a protection structure was designed. The microstrip antenna would not influence the magnetic field of the permanent magnet, and the permanent magnet would not change the resonant frequency of the microstrip antenna; the designed protection structure could eliminate all magnetic field in the non-propagation direction, and would not reduce the intensity of the magnetic field in the propagation direction. When tests were performed on plasmas of 25.5 mm in thickness and the electron density changed from 61010/cm3 to 11011/cm3 , the designed magneto window antenna raised the transmission coefficient from ［－19, －23.5］ dB to ［－11, －16］ dB. The results indicate that the designed GPS magneto window antenna could reduce the influence of plasma on the communication, the magneto window antenna size is miniaturized and the safety in communication is enhanced.